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FEMA Q3 flood data available on Geography Network

ESRI, the leading developer of geographic information system (GIS) software, has announced that Federal Emergency Management Agency (FEMA) flood data has been added to the Geography Network’s extensive collection of georeferenced data. The Geography Network ( www.geographynetwork.com) is a framework for building and launching a commercial data distribution mechanism over the Internet.

Geography Network users can now download FEMA Q3 Flood Data to use with GIS software such as ArcGIS and ArcExplorer—Java Edition. Using GIS software, users can overlay the Q3 Flood Data with their own information (street networks, land parcels, customer addresses, etc.) to display zones of potential flood risk and identify future marketing opportunities. Q3 Flood Data is available for 1,293 U.S. counties, representing 76 percent of U.S. households.
The digital Q3 Flood Data contains the following vectorized (lines and areas) data features:

  • One percent (100 year) and 0.2 percent (500 year) annual chance floodplain boundaries (including velocity zones)
  • Flood insurance zone designations
  • Floodway boundaries (when available)
  • Political boundaries (state, county, and community)
  • Community and map panel identification numbers
  • Flood Insurance Rate Map Panel neatlines
  • U.S. Geological Survey 7.5-minute (1:24,000 scale) topographic map quadrangle neat lines