Free Data
ArcGIS Online Map Services
These free map services can be used with ArcGIS 9.3 Service Pack 1, ArcGIS 9.3.1, ArcGIS 10, and ArcGIS Web Mapping.
- Basemaps—World Imagery, World Street Map, World Topographic Map, World Shaded Relief, World Physical Map, World Terrain Base, USA Topographic Maps, and Ocean Basemap.
- Demographic Maps—Details about the US population, including average household size, median age, population density, retail spending potential, and more.
- Reference Maps—World Boundaries and Places, World Boundaries and Places Alternate, World Reference Overlay, and World Transportation.
- Specialty Maps—DeLorme World Basemap, World Navigation Charts, and Soil Survey Map.
ArcGIS Online Image Services
Dynamic image services based on Global Land Survey (GLS) datasets created by the US Geological Survey (USGS) and the National Aeronautics and Space Administration (NASA) using Landsat images.
Geographic Data Portals
Geodata.gov is part of the E·Gov initiative providing access to geospatial data and information.
Downloadable Data
Download in shapefile format for an area of interest.
Note: The following data is no longer available:
- FEMA Q3 Flood Data
- TomTom Dynamap/Canada Street Data
- TomTom Dynamap/2000 US Street Data
- USGS NED
- Esri World Basemap Data—GIS Tutorial, workbook errata
