This web mapping application allows users to estimate the populations in proximity to natural disasters, and to assess exposure. To return an estimate of the population exposed to natural disasters, you can use one of two tools (found in the upper left):

• Click on to define a polygon.
• Click on to define a circle.

To turn layers on and off, click on in the upper right.

For additional information on how these and other tools work, click on the '?' icon.

You can also click on a point feature such as a power plant, dam, or earthquake to retrieve more information.

Information on natural disasters and environment displayed in this application are updated as follows:

• Fire information from the MODIS active fire instrument is updated every day. This layer is courtesy of NASA EOSDIS LANCE.
• Aerosol Optical Depth and Corrected Reflectance information is updated every day. These layers are courtesy of NASA EOSDIS GIBS.
• Global 250m Water Map is courtesy of NASA EOSDIS GIBS.
• Earthquake information is updated every day. Earthquake alerts are courtesy of USGS.
• Flood and tornado warnings (US only) are updated as they are issued. These are courtesy of NOAA.

Zoom Control and Layer Switcher Tools

Population Estimation Tools

Polygon Tool

• Select the polygon tool from the menu buttons on the top left of map
• Position the cursor to an area of interest
• Click to lay in the major vertices of your polygon encomapssing the area you'd like to get a population estimate
• Click on the first vertice drawn or double click the last point drawn to complete shape and get your population estimate

Circle Tool

• Select the circle tool from the menu buttons on the top left of map
• Position the cursor to an area of interest
• Click and drag to draw a circle to cover the area you'd like to get a population estimate for. Release mouse to get your estimate.

Edit Tool

• Tool is inactive until either a circle or polygon has been drawn
• Select the edit tool from the menu buttons on the top left of map. You are now in edit mode.
• Resize and/or move the circle you'd like to edit to cover new area of interest
• Resize the polygon you'd like to edit by clicking and dragging vertices to cover a new area of interest
• Click save to get your estimate and leave edit mode.

Delete Tool

• Tool is inactive until either a circle or polygon has been drawn
• Select the delete tool from the menu buttons on the top left of map. You are now in delete mode.
• Click on either the circle or polygon to be deleted. This will remove the shape from the display
• Click save to delete the shape and leave delete mode