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GIS (Geographic Information Systems)

Start here for general GIS questions.

HIFLD - Homeland Infrastructure Foundation - Level Data

The HIFLD data collection is provided by the U.S. Department of Homeland Security and includes national scale geospatial data that could be used to support community preparedness, resiliency, research, and other applications.  The datasets are available for download in multiple formats and many can also be accessed as web services.  See the HIFLD Open Data page for more details and access to the datasets.

HiFLD Catagoires