National Aggregates of Geospatial Data Collection:
Population, Landscape and Climate Estimates (PLACE)
Version II
May 8, 2007

Socioeconomic Data and Applications Center (SEDAC)
Center for International Earth Science Information Network (CIESIN)
Columbia University
61 Route 9W
P.O. Box 1000
Palisades, NY 10964

Please address comments to SEDAC User Services
http://sedac.custhelp.com/
(845) 365-8969

This document outlines the basic methodology and datasets used to construct the PLACE II update. Please see the disclaimer and use restrictions at the end of the document, as well as a suggested citation. We appreciate all feedback regarding this dataset, such as: suggestions, discovery of errors, difficulties in using the data, format preferences, etc. 

Introduction

The National Aggregates of Geospatial Data collection is designed to help make geospatial data accessible to analysts in tabular form, aggregated to the national level.  Data were chosen that met the following criteria:

1.	They were global in scope (though some omit coverage for polar regions).
2.	They were capable of meaningful aggregation at the national level.
3.	They were relevant to understanding human-environment interactions.

This is an update to the initial collection that can grow over time as need and feasibility dictates.

Data Format

The data are available in tabular (spreadsheet) format, as a downloadable Excel formatted file from the PLACE web site (http://sedac.ciesin.columbia.edu/place). 

Basic method:

All data were assigned to a Geographic (WGS84) coordinate system and resampled to match the 2.5 arc-minute grid format, resolution and extent of the GPWv3 Population (POP), Administrative Boundary (ADM) and Land Area (LA) grids. Simple cross-tabular evaluations were performed, overlaying classes within each thematic variable, (Density Zones, Coastal Proximity Zones, Climate Zones, Elevation Zones and Biomes) with country boundaries. This returned layers of the classes for each input grid, by country. Since the comparisons were run at the cell level, population and area values could be queried for each pixel, from the underlying POP (1990 and 2000) and LA layers, summed and reported by population and area, by class, by country. 

Source Data

The following input layers were used to calculate PLACE II aggregations. Brief descriptions are given for each dataset, along with the location of more complete documentation, metadata and web addresses for the source datasets.  A complete listing of input variables and classification schema employed is found at the end of this document.

National Boundaries, Shorelines, Population, Land Area, Population Density Classes

The suite of Gridded Population of the World (GPW v3) datasets was used.  GPWv3 includes global estimates of human population for the years 1990 and 2000, formatted in 2.5 arc-minute grid cells. The products include raw population counts (#’s of persons, in thousands), population density (persons per square km), land area (area square km, net of permanent ice and water), national identifier, national boundaries, and coastlines. 

GPWv3 was produced by the Columbia University Center for International Earth Science Information Network (CIESIN) in collaboration with the Centro Internacional de Agricultura Tropical (CIAT). 

Population 

PLACE II use the GPWv3 UN-adjusted population values from 1990 and 2000. Population totals for each country, as presented in the output table (GPW90POP and GPW00POP), were calculcated using a GIS overlay process. Total POP values for all pixels that overlap those for each unique ADM value were summarized, one each of 1990 and 2000 GPW POP layers. Per class percentages were calculated as fractions of this GIS summarized value. Regions where input layers did not contain values (most often true of smaller, island nations), are presented as Missing Data. The sum of all per class percentages, by country, together with the Missing Data values, will equal 100 percent of the GIS calculated POP. While real-world country boundaries changed during the 1990 to 2000 period, for consistency sake, we employed a uniform ADM geography for all analyses; that of the 2000 circa layer.  

Because most countries’ national statistical offices report census data values that differ from United Nations population estimates, GPWv3 data are made available as either adjusted to the UN estimates or in their unadjusted form.  For the UN adjustment, a national-level conversion factor representing the difference between the estimates from each national statistical office and the UN estimate is applied to the population values.  Users wishing to utilize unadjusted population values can find the conversion factors used for each country at: 
http://sedac.ciesin.columbia.edu/gpw/spreadsheets/GPW3_GRUMP_SummaryInformation_Oct05prod.xls (see Excel page Codebok).

Land Area

The GPWv3 global Land Area (LA) grid was used for calculating the size (square km) and percentage land area, per class, by country for each input layer. The GPW LA grid has been calibrated to more precisely represent the actual per cell area (sq.km), which varies latitudinally. The total LA land area values for pixels matching those for a particular ADM unit were summarized using a GIS overlay processes (presented as GPW90AREA and GPW00AREA, which are identical values). Per class percentages, by class by country, were calculated as fractions of this summed national value.  Areas where input layers did not contain spatial information consistent with those region grown to match GPW V3 extents are presented as Missing Data. The total of per class values, together with Missing Values, will equal 100 percent of the GIS calculated area. Large inland water bodies and permanent ice have been removed from the analysis. All region growing processes employed either a focal majority function (categorical data e.g. Biomes) or an averaging function (continuous data, e.g. Elevation).

Coastal Proximity Zones

Coastal proximity zones (regions within 100 or 200km of a coast) were created from the GPWv3 shoreline vector layer. Global coastline features were subset into seven continental coverages (North America, South America, Europe, Africa, Asia, Oceania and Australia), with each projected into a continent-specific Lambert Conformal Polyconic projection. Buffers (100km and 200km) for each of the seven continental line coverages were created from the shorelines, and then clipped to include just the inland portions of the buffer zones. The resulting data layers were projected back into Geographic space and merged, one each for 100km and 200km global coastal zones. 

Population Density Zones

Population Density layers, for 1990 and 2000 were created by dividing the 1990 and 2000 UN-adjusted population (POP) count grids by the land area (LA) grid. The resulting grid layers, one each for 1990 and 2000, were then aggregated to match the 12 population density classes described below. 

Source Information: Center for International Earth Science Information Network (CIESIN), Columbia University; and Centro Internacional de Agricultura Tropical (CIAT). 2005. Gridded Population of the World Version 3 (GPWv3): Population Grids. Palisades, NY: Socioeconomic Data and Applications Center (SEDAC), Columbia University. Available at http://sedac.ciesin.columbia.edu/gpw. .

Elevation Zones

Digital elevation data were obtained as a 1-kilometer resolution elevation/bathymetry raster product from ISciences, L.L.C. (http://www.isciences.com/). Elevation zones were created by aggregating ranges of land elevation values into 12 thematic elevation classes, as described below. The 2004 ISciences data were resampled from their native 30 arc-second resolution to match GPW V3’s population and land area 2.5 arc-minute spatial footprint. ISciences’ TerraViva! SRTM elevation product combines NASA’s Shuttle Radar Topographic Mission (SRTM30) digital elevation data with bathymetric values to produce a seamless, globally consistent land elevation and marine depth layer. Gaps and voids in the original SRTM (v1) data were supplemented by elevation data from the NOAA GLOBE project, http://www.ngdc.noaa.gov/mgg/topo/globe.html) to provide a high-quality global coverage of all land surface areas. 

Source Information: ISciences, L.L.C. 300 N. Fifth Ave. Suite 120., Ann Arbor, MI 48104  http://www.isciences.com/

Climate Zones

The Köppen Climate Classification map of the world, from the U.N. Food and Agriculture Organization (FAO), Sustainable Development Agrometeorology Group (February 2006), was selected to represent global climatological regions. The classification system is based on annual and monthly averages of temperature and precipitation ranges.  Map data were received by CIESIN as .5 degree grids, in geographic projection and resampled to match the extent and resolution of GPWv3 (2.5 arc-minute). The 46 climate zones fall within 5 broad classes, based on general annual distributions of temperature and rainfall. Tropical systems are coded as “A”, Dry systems as “B”, Temperate systems “C”, Cold systems as “D” and Polar systems as “E”. Each of these 5 main classes contains combinations of two levels of subclass identifiers, based on seasonality, precipitiation and temperature patterns. While map outputs depict generalized climate patterns at the superclass level, the full array of 46 detailed classes were used for the analysis and are presented as such in the tables. For more information see FAO’s Sustainable Development (SD) Dimensions web site. 

Source Information: FAO's Sustainable Development Department (SD) – 2006. Global Climate Maps. Köeppen Climate Classification Map. http://www.fao.org/sd/EIdirect/climate/EIsp0002.htm

Biomes

Global Biome data were obtained from the World Wildlife Fund (WWF) Terrestrial Ecoregions of the World dataset, in February, 2006. The data depict global terrestrial vegetation biodiversity patterns for the world’s 825 ecoregions and 14 biomes.  The data are distributed in vector format, created to be used at the scale of 1:1 million. CIESIN converted the data to raster grid format, and clipped and resampled to match the 2.5 arc-minute format, resolution and extent of GPWv3. Biome classes 99 (Rock and Ice ) and 98 (Lake) from the WWF data were recoded to match the dominant surrounding Biome class, to avoid “losing” population numbers for areas where Lake and Rock\Ice class edges did not correspond precisely to GPWv3 edges. 

Source Information: http://www.worldwildlife.org/science/ecoregions/terrestrial.cfm.  See also Olson, D.M., E. Dinerstein, E.D. Wikramanayake, N.D. Burgess, G.V.N. Powell, E.C. Underwood, J.A. D'Amico, H.E. Strand, J.C. Morrison, C.J. Loucks, T.F. Allnutt, J.F. Lamoreux, T.H. Ricketts, I. Itoua, W.W. Wettengel, Y. Kura, P. Hedao, and K. Kassem. 2001. Terrestrial ecoregions of the world: A new map of life on Earth. BioScience 51(11): 933-938.

Updates, Geospatial Processing & Known Errors

All Data Rasterized

PLACE II relies on raster-based data for all calculations, whereas PLACE I used a combination of raster and vector inputs.  PLACE II eliminates some of the inherent spatial error involved when analyzing raster and vector data (Fig. 1) within a common geospatial workspace by converting and processing all data to a common global grid format, resolution and coordinate system. While this process actually adds a measure of error (since raster depictions at 2.5 arc-minutes cannot represent small and\or linear features (islands or shorelines) quite as precisely and accurately as vector data), at the same time it standardizes the distribution of the cross-tabulated error, since all variables will have very nearly the same number of input units (pixels) and their placement and cross-tabular analyses, will be uniformly assessed. 

In addition, all datasets were adjusted to match the raster footprint and extent of the GPWv3 National Boundary land area as well as the shorelines, internal waterbodies and islands (Fig. 2). Areas extending outside of GPW V3 shorelines (mostly along shorelines) were clipped; voids, relative to inland portions of GPW V3 shorelines, were resampled or “region grown”, as previously described. The resulting “edge-matched” datasets provide a spatially consistent and reproducible product.

Fig. 1. Vector and Raster data examples

Note however, the resampling methods utilized did not estimate values for spatially discontinuous regions, such as small islands. Therefore, regions for which input layers do not contain data and GPW V3 sets do are reported as Missing Data. 

Fig. 2. GPW V3 extent                    Biomes over GPW V3         Biomes resampled to match GPW V3

Coastal Zones

The continental scale Lambert Conformal Polyconic projections used here produced coastal zone distance errors in the range of 0-15% for latitudes of 0 (equator) to 70 degrees (north and south). This projection produces greater distance errors in the coastal zone buffers (up to 27%) for higher and lower latitudes (80 degrees, north and south), though population counts for these zones tend to be quite low. 

Error Measurement

One quantitative check of the data presented is the difference between the GIS calculated total, (notated in the docutment as “implicit total area” and “implicit total population”) and the value reported by our refernce sources as the actual land area or population. Both values are presented in the data table. 

Acknowledgment

Funding for this dataset was provided under the U.S. National Aeronautics and Space Administration (NASA) Socioeconomic Data and Applications Center (SEDAC) contract NAS5-98162 to the Center for International Earth Science Information Network (CIESIN) of Columbia University. We wish to acknowledge Dr. Peter Dana, University of Texas at Austin, for his kind help and suggestions with geodetic considerations. We also wish to thank the hard, dedicated work of the many CIESIN staff that made completion of this update possible. 

National Aggregates of Geospatial Data: Population, Landscape and Climate Estimates (PLACE II)
Alpha Release
May, 2007

Codebooks – Area & Population

VARIABLE NAME	VARIABLE DESCRIPTION	
ISO3	International Standards Organization unique three-letter country or area code.	
CONT	continent name.	
CNTRYAR	country or area name.	
ARDN1	 land area (sq. km.), where the population density is: 0 person per sq. km.ž	
ARDN2	 land area (sq. km.), where the population density is: 0-2 persons per sq. km.ž	
ARDN3	 land area (sq. km.), where the population density is: 2-5 persons per sq. km.ž	
ARDN4	 land area (sq. km.), where the population density is: 5-10 persons per sq. km.ž	
ARDN5	 land area (sq. km.), where the population density is: 10-15 persons per sq. km.ž	
ARDN6	 land area (sq. km.), where the population density is: 15-50 persons per sq. km.ž	
ARDN7	 land area (sq. km.), where the population density is: 50-100 persons per sq. km.ž	
ARDN8	 land area (sq. km.), where the population density is: 100-500 persons per sq. km.ž	
ARDN9	 land area (sq. km.), where the population density is: 500-1000 persons per sq. km.ž	
ARDN10	 land area (sq. km.), where the population density is: 1000-10000 persons per sq. km.ž	
ARDN11	 land area (sq. km.), where the population density is: 10000-50000 persons per sq. km.ž	
ARDN12	 land area (sq. km.), where the population density is: >50000 persons per sq. km.ž	
ARDN00	land area (sq. km.), where the population density data are missing.ž	
PARDN1	percent land area, where the population density is: 0 persons per sq. km.ž	
PARDN2	percent land area, where the population density is: 0-2 persons per sq. km.ž	
PARDN3	percent land area, where the population density is: 2-5 persons per sq. km.ž	
PARDN4	percent land area, where the population density is: 5-10 persons per sq. km.ž	
PARDN5	percent land area, where the population density is: 10-15 persons per sq. km.ž	
PARDN6	percent land area, where the population density is: 15-50 persons per sq. km.ž	
PARDN7	percent land area, where the population density is: 50-100 persons per sq. km.ž	
PARDN8	percent land area, where the population density is: 100-500 persons per sq. km.ž	
PARDN9	percent land area, where the population density is: 500-1000 persons per sq. km.ž	
PARDN10	percent land area, where the population density is: 1000-10000 persons per sq. km.ž	
PARDN11	percent land area, where the population density is: 10000-50000 persons per sq. km.ž	
PARDN12	percent land area, where the population density is: >50000 persons per sq. km.ž	
PARDN00	percent land area, where the population density data are missing.ž	
AREL1	land area (sq. km.), where the elevation is: <5 meters. ž	
AREL2	land area (sq. km.), where the elevation is: 5-10 meters. ž	
AREL3	land area (sq. km.), where the elevation is: 10-25 meters. ž	
AREL4	land area (sq. km.), where the elevation is: 25-50 meters. ž	
AREL5	land area (sq. km.), where the elevation is: 50-100 meters. ž	
AREL6	land area (sq. km.), where the elevation is: 100-200 meters. ž	
AREL7	land area (sq. km.), where the elevation is: 200-400 meters. ž	
AREL8	land area (sq. km.), where the elevation is: 400-800 meters. ž	
AREL9	land area (sq. km.), where the elevation is: 800-1500 meters. ž	
AREL10	land area (sq. km.), where the elevation is: 1500-3000 meters. ž	
AREL11	land area (sq. km.), where the elevation is: 3000-5000 meters. ž	
AREL12	land area (sq. km.), where the elevation is: >5000 meters. ž	
AREL00	land area (sq. km.), where the elevation data are missing. ž	
PAREL1	percent land area, where the elevation is: <5 meters. ž	
PAREL2	percent land area, where the elevation is: 5-10 meters. ž	
PAREL3	percent land area, where the elevation is: 10-25 meters. ž	
PAREL4	percent land area, where the elevation is: 25-50 meters. ž	
PAREL5	percent land area, where the elevation is: 50-100 meters. ž	
PAREL6	percent land area, where the elevation is: 100-200 meters. ž	
PAREL7	percent land area, where the elevation is: 200-400 meters. ž	
PAREL8	percent land area, where the elevation is: 400-800 meters. ž	
PAREL9	percent land area, where the elevation is: 800-1500 meters. ž	
PAREL10	percent land area, where the elevation is: 1500-3000 meters. ž	
PAREL11	percent land area, where the elevation is: 3000-5000 meters. ž	
PAREL12	percent land area, where the elevation is: >5000 meters. ž	
PAREL00	percent land area, where the elevation data are missing. ž	
ARCZ1	land area (sq. km.), in climatic zone: Tropical Rain Forest, no dry season, >60mm rain in driest month Af	
ARCZ2	land area (sq. km.), in climatic zone: Tropical Rain Forest, no dry season, >60mm rain in driest month, annual range temperature<5°C Afi	
ARCZ3	land area (sq. km.), in climatic zone: Tropical, Monsoon Type, Short dry season, ground wet all year Am	
ARCZ4	land area (sq. km.), in climatic zone: Tropical, Monsoon Type, Short dry season, ground wet all year, Annual range temperature< 5°C Ami	
ARCZ5	land area (sq. km.), in climatic zone: Tropical, Distinct Dry Searon. One Month with precipitation <60mm Aw	
ARCZ6	land area (sq. km.), in climatic zone: Tropical, Distinct Dry Searon. One Month with precipitation <60mm. Annual range of temperature< 5 °C Awi	
ARCZ7	land area (sq. km.), in climatic zone: Polar, no month with temperature > 10°C EF	
ARCZ8	land area (sq. km.), in climatic zone: Polar, no month with temperature > 10°C, average temperature of coldest month < -38°C. EFd	
ARCZ9	land area (sq. km.), in climatic zone: Polar, tundra, avg temperatureof warmest month > 0°C ET	
ARCZ10	land area (sq. km.), in climatic zone: Polar, tundra, avg temperatureof warmest month > 0°C. avg temperatureof coldest month < -38°C. ETd	
ARCZ11	land area (sq. km.), in climatic zone: Temperate, avg. temp. of coldest month < 18 °C and > -3 °C., avg. temp. warmest month >10 °C. C	
ARCZ12	land area (sq. km.), in climatic zone: Temperate, avg. temp. of coldest month < 18 °C and > -3 °C., avg. temp. warmest month >10 °C. Hot summer, Avg temperatureof month >22 °C. Ca	
ARCZ13	land area (sq. km.), in climatic zone: Temperate, avg. temp. of coldest month < 18 °C and > -3 °C., avg. temp. warmest month >10 °C. Cool summer, Avg temperatureof month <22 °C. Cb	
ARCZ14	land area (sq. km.), in climatic zone: Temperate, avg. temp. of coldest month < 18 °C and > -3 °C., avg. temp. warmest month >10 °C. Cool short Summer, less than 4 months > 10 °C. Cc	
ARCZ15	land area (sq. km.), in climatic zone: Temperage, at least 30mm precipitation in driest month, difference between wettest\driest months < than for Cw and Cs Cf	
ARCZ16	land area (sq. km.), in climatic zone: Temperage, at least 30mm precipitation in driest month, difference between wettest\driest months < than for Cw and Cs. Hot Summer, Avg. temp. warmest month > 22 °C. Cfa	
ARCZ17	land area (sq. km.), in climatic zone: Temperage, at least 30mm precipitation in driest month, difference between wettest\driest months < than for Cw and Cs. Cool Summer, Avg. temp. warmest month < 22 °C. Cfb	
ARCZ18	land area (sq. km.), in climatic zone: Temperage, at least 30mm precipitation in driest month, difference between wettest\driest months < than for Cw and Cs. Cool short Summer, less than 4 months > 10 °C. Cfc	
ARCZ19	land area (sq. km.), in climatic zone: Temperate, Winter dry season. At least 10X as much precipitation in wettest month Summer as driest month Winter. Cw	
ARCZ20	land area (sq. km.), in climatic zone: Temperate, Winter dry season. At least 10X as much precipitation in wettest month Summer as driest month Winter. Hot Summer, avg. temperaturewarmest month > 22°C. Cwa	
ARCZ21	land area (sq. km.), in climatic zone: Temperate, Winter dry season. At least 10X as much precipitation in wettest month Summer as driest month Winter. Cool Summer, avg. temperaturewarmest month < 22 °C Cwb	
ARCZ22	land area (sq. km.), in climatic zone: Temperate, Winter dry season. At least 10X as much precipitation in wettest month Summer as driest month Winter. Cool short Summer, less than 4 months > 10°C. Cwc	
ARCZ23	land area (sq. km.), in climatic zone: Temperate, Summer dry season. At least 3X as much rain in wettest month of Winter as in driest month Summer. Summer < 30mm precipitation. Cs	
ARCZ24	land area (sq. km.), in climatic zone: Temperate, Summer dry season. At least 3X as much rain in wettest month of Winter as in driest month Summer. Summer < 30mm precipitation. Hot Summer, Avg. temperaturewarmest month > 22 °C. Csa	
ARCZ25	land area (sq. km.), in climatic zone: Temperate, Summer dry season. At least 3X as much rain in wettest month of Winter as in driest month Summer. Summer < 30mm precipitation. Cool Summer, avg. temperaturewarmest month < 22 °C. Csb	
ARCZ26	land area (sq. km.), in climatic zone: Temperate, Summer dry season. At least 3X as much rain in wettest month of Winter as in driest month Summer. Summer < 30mm precipitation. Cool, short Summer, less than 4 months > 10 °C. Csc	
ARCZ27	land area (sq. km.), in climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. hot summer, avg. temperatureof warmest month > 22°C Da	
ARCZ28	land area (sq. km.), in climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. Cool summer, avg temperaturewarmest month < 22°C Db	
ARCZ29	land area (sq. km.), in climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. Cool, short summer less than four months > 10°C Dc	
ARCZ30	land area (sq. km.), in climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. Avg temperatureof coldest month < -38°C Dd	
ARCZ31	land area (sq. km.), in climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. at least 30 mm rain in driest month, difference between wettest month\driest month less than for Cw and Cs Dfa	
ARCZ32	land area (sq. km.), in climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. at least 30 mm rain in driest month, difference between wettest month\driest month less than for Cw and Cs. Cool summer, avg temperatureof warm Dfb	
ARCZ33	land area (sq. km.), in climatic zone: Cold, Avg temp of warmest month > 10°C and coldest month < -3°C. at least 30 mm rain in driest month, difference between wettest month\driest month less than for Cw and Cs. Cool, short summer less than four months > 10°C Dfc	
ARCZ34	land area (sq. km.), in climatic zone: Cold. Avg temp of warmest month > 10°C and that of coldest month < -3°C. winter dry season - at least 10 times as much precip in wettest month of summer as in driest month of winter. hot summer, avg temp of warmest month > 22°C Dwa	
ARCZ35	land area (sq. km.), in climatic zone: Cold. Avg temperatureof warmest month > 10°C and that of coldest month < -3°C. winter dry season - at least 10 times as much precipitation in wettest month of summer as in driest month of winter. cool summer, avg te Dwb	
ARCZ36	land area (sq. km.), in climatic zone: Cold. Avg temperatureof warmest month > 10°C and that of coldest month < -3°C. winter dry season - at least 10 times as much precipitation in wettest month of summer as in driest month of winter. cool, short summer Dwc	
ARCZ37	land area (sq. km.), in climatic zone: Cold. Avg temperatureof warmest month > 10°C and that of coldest month < -3°C. winter dry season - at least 10 times as much precipitation in wettest month of summer as in driest month of winter. avg temperatureof coldest Dwd	
ARCZ38	land area (sq. km.), in climatic zone: Dry, Steppe Vegetation Type BS	
ARCZ39	land area (sq. km.), in climatic zone: Dry, Steppe Vegetation Type, Subtropical desert, avg. temperature>18 °C BSh	
ARCZ40	land area (sq. km.), in climatic zone: Dry, Steppe Vegetation Type, cool dry climate, middle latitude deserts BSk	
ARCZ41	land area (sq. km.), in climatic zone: Dry, Steppe Vegetation Type, temp. of warmest month < 18 °C BSk'	
ARCZ42	land area (sq. km.), in climatic zone: Desert Vegetation Type BW	
ARCZ43	land area (sq. km.), in climatic zone: Desert Vegetation Type, Subtropical desert, avg. temperature> 18 °C. BWh	
ARCZ44	land area (sq. km.), in climatic zone: Desert Vegetation Type, cool dry climate of middle latitude deserts BWk	
ARCZ45	land area (sq. km.), in climatic zone: Desert Vegetation Type, temperatureof warmest month < 18 °C. BWk'	
ARCZ00	land area (sq. km.), where climatic zone data are missing.	
PARCZ1	percent land area (sq. km.), in climatic zone: Tropical Rain Forest, no dry season, >60mm rain in driest month Af	
PARCZ2	percent land area (sq. km.), in climatic zone: Tropical Rain Forest, no dry season, >60mm rain in driest month, annual range temperature<5°C Afi	
PARCZ3	percent land area (sq. km.), in climatic zone: Tropical, Monsoon Type, Short dry season, ground wet all year Am	
PARCZ4	percent land area (sq. km.), in climatic zone: Tropical, Monsoon Type, Short dry season, ground wet all year, Annual range temperature< 5°C Ami	
PARCZ5	percent land area (sq. km.), in climatic zone: Tropical, Distinct Dry Searon. One Month with precipitation <60mm Aw	
PARCZ6	percent land area (sq. km.), in climatic zone: Tropical, Distinct Dry Searon. One Month with precipitation <60mm. Annual range of temperature< 5 °C Awi	
PARCZ7	percent land area (sq. km.), in climatic zone: Polar, no month with temperature > 10°C EF	
PARCZ8	percent land area (sq. km.), in climatic zone: Polar, no month with temperature > 10°C, average temperature of coldest month < -38°C. EFd	
PARCZ9	percent land area (sq. km.), in climatic zone: Polar, tundra, avg temperatureof warmest month > 0°C ET	
PARCZ10	percent land area (sq. km.), in climatic zone: Polar, tundra, avg temperatureof warmest month > 0°C. avg temperatureof coldest month < -38°C. ETd	
PARCZ11	percent land area (sq. km.), in climatic zone: Temperate, avg. temp. of coldest month < 18 °C and > -3 °C., avg. temp. warmest month >10 °C. C	
PARCZ12	percent land area (sq. km.), in climatic zone: Temperate, avg. temp. of coldest month < 18 °C and > -3 °C., avg. temp. warmest month >10 °C. Hot summer, Avg temperatureof month >22 °C. Ca	
PARCZ13	percent land area (sq. km.), in climatic zone: Temperate, avg. temp. of coldest month < 18 °C and > -3 °C., avg. temp. warmest month >10 °C. Cool summer, Avg temperatureof month <22 °C. Cb	
PARCZ14	percent land area (sq. km.), in climatic zone: Temperate, avg. temp. of coldest month < 18 °C and > -3 °C., avg. temp. warmest month >10 °C. Cool short Summer, less than 4 months > 10 °C. Cc	
PARCZ15	percent land area (sq. km.), in climatic zone: Temperage, at least 30mm precipitation in driest month, difference between wettest\driest months < than for Cw and Cs Cf	
PARCZ16	percent land area (sq. km.), in climatic zone: Temperage, at least 30mm precipitation in driest month, difference between wettest\driest months < than for Cw and Cs. Hot Summer, Avg. temp. warmest month > 22 °C. Cfa	
PARCZ17	percent land area (sq. km.), in climatic zone: Temperage, at least 30mm precipitation in driest month, difference between wettest\driest months < than for Cw and Cs. Cool Summer, Avg. temp. warmest month < 22 °C. Cfb	
PARCZ18	percent land area (sq. km.), in climatic zone: Temperage, at least 30mm precipitation in driest month, difference between wettest\driest months < than for Cw and Cs. Cool short Summer, less than 4 months > 10 °C. Cfc	
PARCZ19	percent land area (sq. km.), in climatic zone: Temperate, Winter dry season. At least 10X as much precipitation in wettest month Summer as driest month Winter. Cw	
PARCZ20	percent land area (sq. km.), in climatic zone: Temperate, Winter dry season. At least 10X as much precipitation in wettest month Summer as driest month Winter. Hot Summer, avg. temperaturewarmest month > 22°C. Cwa	
PARCZ21	percent land area (sq. km.), in climatic zone: Temperate, Winter dry season. At least 10X as much precipitation in wettest month Summer as driest month Winter. Cool Summer, avg. temperaturewarmest month < 22 °C Cwb	
PARCZ22	percent land area (sq. km.), in climatic zone: Temperate, Winter dry season. At least 10X as much precipitation in wettest month Summer as driest month Winter. Cool short Summer, less than 4 months > 10°C. Cwc	
PARCZ23	percent land area (sq. km.), in climatic zone: Temperate, Summer dry season. At least 3X as much rain in wettest month of Winter as in driest month Summer. Summer < 30mm precipitation. Cs	
PARCZ24	percent land area (sq. km.), in climatic zone: Temperate, Summer dry season. At least 3X as much rain in wettest month of Winter as in driest month Summer. Summer < 30mm precipitation. Hot Summer, Avg. temperaturewarmest month > 22 °C. Csa	
PARCZ25	percent land area (sq. km.), in climatic zone: Temperate, Summer dry season. At least 3X as much rain in wettest month of Winter as in driest month Summer. Summer < 30mm precipitation. Cool Summer, avg. temperaturewarmest month < 22 °C. Csb	
PARCZ26	percent land area (sq. km.), in climatic zone: Temperate, Summer dry season. At least 3X as much rain in wettest month of Winter as in driest month Summer. Summer < 30mm precipitation. Cool, short Summer, less than 4 months > 10 °C. Csc	
PARCZ27	percent land area (sq. km.), in climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. hot summer, avg. temperatureof warmest month > 22°C Da	
PARCZ28	percent land area (sq. km.), in climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. Cool summer, avg temperaturewarmest month < 22°C Db	
PARCZ29	percent land area (sq. km.), in climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. Cool, short summer less than four months > 10°C Dc	
PARCZ30	percent land area (sq. km.), in climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. Avg temperatureof coldest month < -38°C Dd	
PARCZ31	percent land area (sq. km.), in climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. at least 30 mm rain in driest month, difference between wettest month\driest month less than for Cw and Cs Dfa	
PARCZ32	percent land area (sq. km.), in climatic zone: Cold, Avg temperature of warmest month > 10°C and coldest month < -3°C. at least 30 mm rain in driest month, difference between wettest month\driest month less than for Cw and Cs. Cool summer, avg temperature of warm Dfb	
PARCZ33	percent land area (sq. km.), in climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. at least 30 mm rain in driest month, difference between wettest month\driest month less than for Cw and Cs. Cool, short summer less than Dfc	
PARCZ34	percent land area (sq. km.), in climatic zone: Cold. Avg temperatureof warmest month > 10°C and that of coldest month < -3°C. winter dry season - at least 10 times as much precipitation in wettest month of summer as in driest month of winter. hot summer, avg tem Dwa	
PARCZ35	percent land area (sq. km.), in climatic zone: Cold. Avg temperatureof warmest month > 10°C and that of coldest month < -3°C. winter dry season - at least 10 times as much precipitation in wettest month of summer as in driest month of winter. cool summer, avg te Dwb	
PARCZ36	percent land area (sq. km.), in climatic zone: Cold. Avg temperatureof warmest month > 10°C and that of coldest month < -3°C. winter dry season - at least 10 times as much precipitation in wettest month of summer as in driest month of winter. cool, short summer Dwc	
PARCZ37	percent land area (sq. km.), in climatic zone: Cold. Avg temperatureof warmest month > 10°C and that of coldest month < -3°C. winter dry season - at least 10 times as much precipitation in wettest month of summer as in driest month of winter. avg temperatureof coldest Dwd	
PARCZ38	percent land area (sq. km.), in climatic zone: Dry, Steppe Vegetation Type BS	
PARCZ39	percent land area (sq. km.), in climatic zone: Dry, Steppe Vegetation Type, Subtropical desert, avg. temperature>18 °C BSh	
PARCZ40	percent land area (sq. km.), in climatic zone: Dry, Steppe Vegetation Type, cool dry climate, middle latitude deserts BSk	
PARCZ41	percent land area (sq. km.), in climatic zone: Dry, Steppe Vegetation Type, temp. of warmest month < 18 °C BSk'	
PARCZ42	percent land area (sq. km.), in climatic zone: Desert Vegetation Type BW	
PARCZ43	percent land area (sq. km.), in climatic zone: Desert Vegetation Type, Subtropical desert, avg. temperature> 18 °C. BWh	
PARCZ44	percent land area (sq. km.), in climatic zone: Desert Vegetation Type, cool dry climate of middle latitude deserts BWk	
PARCZ45	percent land area (sq. km.), in climatic zone: Desert Vegetation Type, temperatureof warmest month < 18 °C. BWk'	
PARCZ46	percent land area (sq. km.), where climatic zone data are missing.	

		

		

		
		
ISO3	International Standards Organization unique three-letter country or area code.	
CONT	continent name.	
CNTRYPOP	country or area name.	
POPDN1	number of persons living in area(s) where the population density is: 0 person per sq. km.*	
POPDN2	number of persons living in area(s) where the population density is: 0-2 persons per sq. km. *	
POPDN3	number of persons living in area(s) where the population density is: 2-5 persons per sq. km. *	
POPDN4	number of persons living in area(s) where the population density is: 5-10 persons per sq. km. *	
POPDN5	number of persons living in area(s) where the population density is: 10-15 persons per sq. km. *	
POPDN6	number of persons living in area(s) where the population density is: 15-50 persons per sq. km. *	
POPDN7	number of persons living in area(s) where the population density is: 50-100 persons per sq. km. *	
POPDN8	number of persons living in area(s) where the population density is: 100-500 persons per sq. km.*	
POPDN9	number of persons living in area(s) where the population density is: 500-1000 persons per sq. km. *	
POPDN10	number of persons living in area(s) where the population density is: 1000-10000 persons per sq. km. *	
POPDN11	number of persons living in area(s) where the population density is: 10000-50000 persons per sq. km. *	
POPDN12	number of persons living in area(s) where the population density is: >50000 persons per sq. km. *	
POPDN00	number of persons living in area(s) where the population density data are missing. *	
PPOPDN1	percent population, in area(s) where the population density is: 0 persons per sq. km. *	
PPOPDN2	percent population, in area(s) where the population density is: 0-2 persons per sq. km. *	
PPOPDN3	percent population, in area(s) where the population density is: 2-5 persons per sq. km. *	
PPOPDN4	percent population, in area(s) where the population density is: 5-10 persons per sq. km. *	
PPOPDN5	percent population, in area(s) where the population density is: 10-15 persons per sq. km. *	
PPOPDN6	percent population, in area(s) where the population density is: 15-50 persons per sq. km. *	
PPOPDN7	percent population, in area(s) where the population density is: 50-100 persons per sq. km. *	
PPOPDN8	percent population, in area(s) where the population density is: 100-500 persons per sq. km. * 	
PPOPDN9	percent population, in area(s) where the population density is: 500-1000 persons per sq. km. *	
PPOPDN10	percent population, in area(s) where the population density is: 1000-10000 persons per sq. km. *	
PPOPDN11	percent population, in area(s) where the population density is: 10000-50000 persons per sq. km. *	
PPOPDN12	percent population, in area(s) where the population density is: >50000 persons per sq. km. *	
PPOPDN00	percent population, in area(s) where the population density data are missing. *	
POPEL1	population living in area(s) where the elevation is: <5 meters. *	
POPEL2	population living in area(s) where the elevation is: 5-10 meters. *	
POPEL3	population living in area(s) where the elevation is: 10-25 meters. *	
POPEL4	population living in area(s) where the elevation is: 25-50 meters. *	
POPEL5	population living in area(s) where the elevation is: 50-100 meters. *	
POPEL6	population living in area(s) where the elevation is: 100-200 meters. *	
POPEL7	population living in area(s) where the elevation is: 200-400 meters. *	
POPEL8	population living in area(s) where the elevation is: 400-800 meters. *	
POPEL9	population living in area(s) where the elevation is: 800-1500 meters. *	
POPEL10	population living in area(s) where the elevation is: 1500-3000 meters. *	
POPEL11	population living in area(s) where the elevation is: 3000-5000 meters. *	
POPEL12	population living in area(s) where the elevation is: >5000 meters. *	
POPEL00	population living in area(s) where the elevation data are missing. *	
PPOPEL1	percent population, in area(s) where the elevation is: <5 meters. *	
PPOPEL2	percent population, in area(s) where the elevation is: 5-10 meters. *	
PPOPEL3	percent population, in area(s) where the elevation is: 10-25 meters. *	
PPOPEL4	percent population, in area(s) where the elevation is: 25-50 meters. *	
PPOPEL5	percent population, in area(s) where the elevation is: 50-100 meters. *	
PPOPEL6	percent population, in area(s) where the elevation is: 100-200 meters. *	
PPOPEL7	percent population, in area(s) where the elevation is: 200-400 meters. *	
PPOPEL8	percent population, in area(s) where the elevation is: 400-800 meters. *	
PPOPEL9	percent population, in area(s) where the elevation is: 800-1500 meters. *	
PPOPEL10	percent population, in area(s) where the elevation is: 1500-3000 meters. *	
PPOPEL11	percent population, in area(s) where the elevation is: 3000-5000 meters. *	
PPOPEL12	percent population, in area(s) where the elevation is: >5000 meters. *	
PPOPEL00	percent population, in area(s) where the elevation data are missing. *	
POPCZ1	population in  climatic zone: Tropical Rain Forest, no dry season, >60mm rain in driest month Af	
POPCZ2	population in  climatic zone: Tropical Rain Forest, no dry season, >60mm rain in driest month, annual range temperature<5°C Afi	
POPCZ3	population in  climatic zone: Tropical, Monsoon Type, Short dry season, ground wet all year Am	
POPCZ4	population in  climatic zone: Tropical, Monsoon Type, Short dry season, ground wet all year, Annual range temperature< 5°C Ami	
POPCZ5	population in  climatic zone: Tropical, Distinct Dry Searon. One Month with precipitation <60mm Aw	
POPCZ6	population in  climatic zone: Tropical, Distinct Dry Searon. One Month with precipitation <60mm. Annual range of temperature< 5 °C Awi	
POPCZ7	population in  climatic zone: Polar, no month with temperature > 10°C EF	
POPCZ8	population in  climatic zone: Polar, no month with temperature > 10°C, average temperature of coldest month < -38°C. EFd	
POPCZ9	population in  climatic zone: Polar, tundra, avg temperatureof warmest month > 0°C ET	
POPCZ10	population in  climatic zone: Polar, tundra, avg temperatureof warmest month > 0°C. avg temperatureof coldest month < -38°C. ETd	
POPCZ11	population in  climatic zone: Temperate, avg. temp. of coldest month < 18 °C and > -3 °C., avg. temp. warmest month >10 °C. C	
POPCZ12	population in  climatic zone: Temperate, avg. temp. of coldest month < 18 °C and > -3 °C., avg. temp. warmest month >10 °C. Hot summer, Avg temperatureof month >22 °C. Ca	
POPCZ13	population in  climatic zone: Temperate, avg. temp. of coldest month < 18 °C and > -3 °C., avg. temp. warmest month >10 °C. Cool summer, Avg temperatureof month <22 °C. Cb	
POPCZ14	population in  climatic zone: Temperate, avg. temp. of coldest month < 18 °C and > -3 °C., avg. temp. warmest month >10 °C. Cool short Summer, less than 4 months > 10 °C. Cc	
POPCZ15	population in  climatic zone: Temperage, at least 30mm precipitation in driest month, difference between wettest\driest months < than for Cw and Cs Cf	
POPCZ16	population in  climatic zone: Temperate, at least 30mm precipitation in driest month, difference between wettest\driest months < than for Cw and Cs. Hot Summer, Avg. temp. warmest month > 22 °C. Cfa	
POPCZ17	population in  climatic zone: Temperate, at least 30mm precipitation in driest month, difference between wettest\driest months < than for Cw and Cs. Cool Summer, Avg. temp. warmest month < 22 °C. Cfb	
POPCZ18	population in  climatic zone: Temperage, at least 30mm precipitation in driest month, difference between wettest\driest months < than for Cw and Cs. Cool short Summer, less than 4 months > 10 °C. Cfc	
POPCZ19	population in  climatic zone: Temperate, Winter dry season. At least 10X as much precipitation in wettest month Summer as driest month Winter. Cw	
POPCZ20	population in  climatic zone: Temperate, Winter dry season. At least 10X as much precipitation in wettest month Summer as driest month Winter. Hot Summer, avg. temperaturewarmest month > 22°C. Cwa	
POPCZ21	population in  climatic zone: Temperate, Winter dry season. At least 10X as much precipitation in wettest month Summer as driest month Winter. Cool Summer, avg. temperaturewarmest month < 22 °C Cwb	
POPCZ22	population in  climatic zone: Temperate, Winter dry season. At least 10X as much precipitation in wettest month Summer as driest month Winter. Cool short Summer, less than 4 months > 10°C. Cwc	
POPCZ23	population in  climatic zone: Temperate, Summer dry season. At least 3X as much rain in wettest month of Winter as in driest month Summer. Summer < 30mm precipitation. Cs	
POPCZ24	population in  climatic zone: Temperate, Summer dry season. At least 3X as much rain in wettest month of Winter as in driest month Summer. Summer < 30mm precipitation. Hot Summer, Avg. temperaturewarmest month > 22 °C. Csa	
POPCZ25	population in  climatic zone: Temperate, Summer dry season. At least 3X as much rain in wettest month of Winter as in driest month Summer. Summer < 30mm precipitation. Cool Summer, avg. temperaturewarmest month < 22 °C. Csb	
POPCZ26	population in  climatic zone: Temperate, Summer dry season. At least 3X as much rain in wettest month of Winter as in driest month Summer. Summer < 30mm precipitation. Cool, short Summer, less than 4 months > 10 °C. Csc	
POPCZ27	population in  climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. hot summer, avg. temperatureof warmest month > 22°C Da	
POPCZ28	population in  climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. Cool summer, avg temperaturewarmest month < 22°C Db	
POPCZ29	population in  climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. Cool, short summer less than four months > 10°C Dc	
POPCZ30	population in  climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. Avg temperatureof coldest month < -38°C Dd	
POPCZ31	population in  climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. at least 30 mm rain in driest month, difference between wettest month\driest month less than for Cw and Cs Dfa	
POPCZ32	population in  climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. at least 30 mm rain in driest month, difference between wettest month\driest month less than for Cw and Cs. Cool summer, avg temperature of warmest month < 22°C Dfb	
POPCZ33	population in  climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. at least 30 mm rain in driest month, difference between wettest month\driest month less than for Cw and Cs. Cool, short summer less than four months > 10°C Dfc	
POPCZ34	population in  climatic zone: Cold. Avg temperatureof warmest month > 10°C and that of coldest month < -3°C. winter dry season - at least 10 times as much precipitation in wettest month of summer as in driest month of winter. hot summer, avg tem Dwa	
POPCZ35	population in  climatic zone: Cold. Avg temperatureof warmest month > 10°C and that of coldest month < -3°C. winter dry season - at least 10 times as much precipitation in wettest month of summer as in driest month of winter. hot summer, avg temperatureof warmest month > 22°C Dwb	
POPCZ36	population in  climatic zone: Cold. Avg temperatureof warmest month > 10°C and that of coldest month < -3°C. winter dry season - at least 10 times as much precipitation in wettest month of summer as in driest month of winter. cool summer, avg temperatureof warmest month < 22°C Dwc	
POPCZ37	population in  climatic zone: Cold. Avg temperatureof warmest month > 10°C and that of coldest month < -3°C. winter dry season - at least 10 times as much precipitation in wettest month of summer as in driest month of winter. cool, short summer less than four months > 10°C Dwd	
POPCZ38	population in  climatic zone: Dry, Steppe Vegetation Type BS	
POPCZ39	population in  climatic zone: Dry, Steppe Vegetation Type, Subtropical desert, avg. temperature>18 °C BSh	
POPCZ40	population in  climatic zone: Dry, Steppe Vegetation Type, cool dry climate, middle latitude deserts BSk	
POPCZ41	population in  climatic zone: Dry, Steppe Vegetation Type, temp. of warmest month < 18 °C BSk'	
POPCZ42	population in  climatic zone: Desert Vegetation Type BW	
POPCZ43	population in  climatic zone: Desert Vegetation Type, Subtropical desert, avg. temperature> 18 °C. BWh	
POPCZ44	population in  climatic zone: Desert Vegetation Type, cool dry climate of middle latitude deserts BWk	
POPCZ45	population in  climatic zone: Desert Vegetation Type, temperatureof warmest month < 18 °C. BWk'	
POPCZ00	population where climatic zone data are missing.	
PPOPCZ1	percent population, in  climatic zone: Tropical Rain Forest, no dry season, >60mm rain in driest month Af	
PPOPCZ2	percent population, in  climatic zone: Tropical Rain Forest, no dry season, >60mm rain in driest month, annual range temperature<5°C Afi	
PPOPCZ3	percent population, in  climatic zone: Tropical, Monsoon Type, Short dry season, ground wet all year Am	
PPOPCZ4	percent population, in  climatic zone: Tropical, Monsoon Type, Short dry season, ground wet all year, Annual range temperature< 5°C Ami	
PPOPCZ5	percent population, in  climatic zone: Tropical, Distinct Dry Searon. One Month with precipitation <60mm Aw	
PPOPCZ6	percent population, in  climatic zone: Tropical, Distinct Dry Searon. One Month with precipitation <60mm. Annual range of temperature< 5 °C Awi	
PPOPCZ7	percent population, in  climatic zone: Polar, no month with temperature > 10°C EF	
PPOPCZ8	percent population, in  climatic zone: Polar, no month with temperature > 10°C, average temperature of coldest month < -38°C. EFd	
PPOPCZ9	percent population, in  climatic zone: Polar, tundra, avg temperatureof warmest month > 0°C ET	
PPOPCZ10	percent population, in  climatic zone: Polar, tundra, avg temperatureof warmest month > 0°C. avg temperatureof coldest month < -38°C. ETd	
PPOPCZ11	percent population, in  climatic zone: Temperate, avg. temp. of coldest month < 18 °C and > -3 °C., avg. temp. warmest month >10 °C. C	
PPOPCZ12	percent population, in  climatic zone: Temperate, avg. temp. of coldest month < 18 °C and > -3 °C., avg. temp. warmest month >10 °C. Hot summer, Avg temperatureof month >22 °C. Ca	
PPOPCZ13	percent population, in  climatic zone: Temperate, avg. temp. of coldest month < 18 °C and > -3 °C., avg. temp. warmest month >10 °C. Cool summer, Avg temperature of month <22 °C. Cb	
PPOPCZ14	percent population, in  climatic zone: Temperate, avg. temp. of coldest month < 18 °C and > -3 °C., avg. temp. warmest month >10 °C. Cool short Summer, less than 4 months > 10 °C. Cc	
PPOPCZ15	percent population, in  climatic zone: Temperage, at least 30mm precipitation in driest month, difference between wettest\driest months < than for Cw and Cs Cf	
PPOPCZ16	percent population, in  climatic zone: Temperage, at least 30mm precipitation in driest month, difference between wettest\driest months < than for Cw and Cs. Hot Summer, Avg. temp. warmest month > 22 °C. Cfa	
PPOPCZ17	percent population, in  climatic zone: Temperage, at least 30mm precipitation in driest month, difference between wettest\driest months < than for Cw and Cs. Cool Summer, Avg. temp. warmest month < 22 °C. Cfb	
PPOPCZ18	percent population, in  climatic zone: Temperage, at least 30mm precipitation in driest month, difference between wettest\driest months < than for Cw and Cs. Cool short Summer, less than 4 months > 10 °C. Cfc	
PPOPCZ19	percent population, in  climatic zone: Temperate, Winter dry season. At least 10X as much precipitation in wettest month Summer as driest month Winter. Cw	
PPOPCZ20	percent population, in  climatic zone: Temperate, Winter dry season. At least 10X as much precipitation in wettest month Summer as driest month Winter. Hot Summer, avg. temperature of warmest month > 22°C. Cwa	
PPOPCZ21	percent population, in  climatic zone: Temperate, Winter dry season. At least 10X as much precipitation in wettest month Summer as driest month Winter. Cool Summer, avg. temperature of warmest month < 22 °C Cwb	
PPOPCZ22	percent population, in  climatic zone: Temperate, Winter dry season. At least 10X as much precipitation in wettest month Summer as driest month Winter. Cool short Summer, less than 4 months > 10°C. Cwc	
PPOPCZ23	percent population, in  climatic zone: Temperate, Summer dry season. At least 3X as much rain in wettest month of Winter as in driest month Summer. Summer < 30mm precipitation. Cs	
PPOPCZ24	percent population, in  climatic zone: Temperate, Summer dry season. At least 3X as much rain in wettest month of Winter as in driest month Summer. Summer < 30mm precipitation. Hot Summer, Avg. temperature warmest month > 22 °C. Csa	
PPOPCZ25	percent population, in  climatic zone: Temperate, Summer dry season. At least 3X as much rain in wettest month of Winter as in driest month Summer. Summer < 30mm precipitation. Cool Summer, avg. temperature warmest month < 22 °C. Csb	
PPOPCZ26	percent population, in  climatic zone: Temperate, Summer dry season. At least 3X as much rain in wettest month of Winter as in driest month Summer. Summer < 30mm precipitation. Cool, short Summer, less than 4 months > 10 °C. Csc	
PPOPCZ27	percent population, in  climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. hot summer, avg. temperature of warmest month > 22°C Da	
PPOPCZ28	percent population, in  climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. Cool summer, avg temperature warmest month < 22°C Db	
PPOPCZ29	percent population, in  climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. Cool, short summer less than four months > 10°C Dc	
PPOPCZ30	percent population, in  climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. Avg temperatureof coldest month < -38°C Dd	
PPOPCZ31	percent population, in  climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. at least 30 mm rain in driest month, difference between wettest month\driest month less than for Cw and Cs Dfa	
PPOPCZ32	percent population, in  climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. at least 30 mm rain in driest month, difference between wettest month\driest month less than for Cw and Cs. Cool summer, avg temperature of warmest month < 22°C Dfb	
PPOPCZ33	percent population, in  climatic zone: Cold, Avg temperatureof warmest month > 10°C and coldest month < -3°C. at least 30 mm rain in driest month, difference between wettest month\driest month less than for Cw and Cs. Cool, short summer less than four months > 10°C  Dfc	
PPOPCZ34	percent population, in  climatic zone: Cold. Avg temperatureof warmest month > 10°C and that of coldest month < -3°C. winter dry season - at least 10 times as much precipitation in wettest month of summer as in driest month of winter. hot summer, avg temperature of warmest month > 22°C Dwa	
PPOPCZ35	percent population, in  climatic zone: Cold. Avg temperatureof warmest month > 10°C and that of coldest month < -3°C. winter dry season - at least 10 times as much precipitation in wettest month of summer as in driest month of winter. cool summer, avg temperature of warmest month < 22°C Dwb	
PPOPCZ36	percent population, in  climatic zone: Cold. Avg temperatureof warmest month > 10°C and that of coldest month < -3°C. winter dry season - at least 10 times as much precipitation in wettest month of summer as in driest month of winter. cool, short summer less than four months > 10°C Dwc	
PPOPCZ37	percent population, in  climatic zone: Cold. Avg temperatureof warmest month > 10°C and that of coldest month < -3°C. winter dry season - at least 10 times as much precipitation in wettest month of summer as in driest month of winter. avg temperature of coldest month < -38°C Dwd	
PPOPCZ38	percent population, in  climatic zone: Dry, Steppe Vegetation Type BS	
PPOPCZ39	percent population, in  climatic zone: Dry, Steppe Vegetation Type, Subtropical desert, avg. temperature>18 °C BSh	
PPOPCZ40	percent population, in  climatic zone: Dry, Steppe Vegetation Type, cool dry climate, middle latitude deserts BSk	
PPOPCZ41	percent population, in  climatic zone: Dry, Steppe Vegetation Type, temp. of warmest month < 18 °C BSk'	
PPOPCZ42	percent population, in  climatic zone: Desert Vegetation Type BW	
PPOPCZ43	percent population, in  climatic zone: Desert Vegetation Type, Subtropical desert, avg. temperature> 18 °C. BWh	
PPOPCZ44	percent population, in  climatic zone: Desert Vegetation Type, cool dry climate of middle latitude deserts BWk	
PPOPCZ45	percent population, in  climatic zone: Desert Vegetation Type, temperatureof warmest month < 18 °C. BWk'	
PPOPCZ00	percent population, where climatic zone data are missing.	
POPCP1	population, within 100 km of the coast.	
POPCP2	population, within 200 km of the coast.	
PPOPCP1	percent population, within 100 km of the coast.	
PPOPCP2	percent population, within 200 km of the coast.	
POPBI1	population in  the biome class of:  tropical & subtropical moist broadleaf forests.	
POPBI2	population in  the biome class of:  tropical & subtropical dry broadleaf forests.	
POPBI3	population in  the biome class of:  tropical & subtropical coniferous forests.	
POPBI4	population in  the biome class of:  temperate broadleaf & mixed forests.	
POPBI5	population in  the biome class of:  temperate conifer forests.	
POPBI6	population in  the biome class of: boreal forests/taiga.	
POPBI7	population in  the biome class of: tropical & subtropical grasslands, savannas & shrublands.	
POPBI8	population in  the biome class of: temperate grasslands, savannas & shrublands.	
POPBI9	population in  the biome class of: flooded grasslands & savannas.	
POPBI10	population in  the biome class of: montane grasslands & shrublands.	
POPBI11	population in  the biome class of: tundra.	
POPBI12	population in  the biome class of: Mediterranean forests, woodlands & scrub.	
POPBI13	population in  the biome class of: deserts & xeric shrublands.	
POPBI14	population in  the biome class of: mangroves.	
POPBI00	population where the biome data are missing.	
PPOPBI1	percent population,  in the biome class of: tropical & subtropical moist broadleaf forests.	
PPOPBI2	percent population,  in the biome class of: tropical & subtropical dry broadleaf forests.	
PPOPBI3	percent population,  in the biome class of: tropical & subtropical coniferous forests.	
PPOPBI4	percent population,  in the biome class of: temperate broadleaf & mixed forests.	
PPOPBI5	percent population,  in the biome class of: temperate conifer forests.	
PPOPBI6	percent population,  in the biome class of: boreal forests/taiga.	
PPOPBI7	percent population,  in the biome class of: tropical & subtropical grasslands, savannas & shrublands.	
PPOPBI8	percent population,  in the biome class of: temperate grasslands, savannas & shrublands.	
PPOPBI9	percent population,  in the biome class of: flooded grasslands & savannas.	
PPOPBI10	percent population,  in the biome class of: montane grasslands & shrublands.	
PPOPBI11	percent population,  in the biome class of: tundra.	
PPOPBI12	percent population,  in the biome class of: Mediterranean forests, woodlands & scrub.	
PPOPBI13	percent population,  in the biome class of: deserts & xeric shrublands.	
PPOPBI14	percent population,  in the biome class of: mangroves.	
		
*	Population figures are expressed in thousands.	
	Categories are mutually exclusive.  Where number values within variable description overlap (between class breakdowns), the higher end of the lower range is inclusive and the lower end of the higher range is exclusive.  For example, ARDN1 is defined as “land area (sq. km.), where the population density is: 0 person per sq. km.” and ARDN2 is defined as “land area (sq. km.), where the population density is: 0-2 persons per sq. km.” Although the labels suggest possible overlap, ARDN2 is actually calculated as >0-2 persons per sq. km.  Likewise, POPDN2 is actually calculated as, "number of persons living in area(s) where the population density is: >0-2 persons per sq. km.".	

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Citation

The following citation is recommended when using data from this collection:

Center for International Earth Science Information Network (CIESIN), Columbia University, 2007. National Aggregates of Geospatial Data: Population, Landscape and Climate Estimates Version 2 (PLACE II), Palisades, NY: CIESIN, Columbia University. Available at: http://sedac.ciesin.columbia.edu/place