Geographic Data Resources
“CrimeStat III is a spatial statistics program for the analysis of crime incident locations. The program inputs incident locations (e.g., robbery locations) in ‘dbf’, ‘shp’, ASCII or ODBC-compliant formats using either spherical or projected coordinates. It calculates various spatial statistics and writes graphical objects to ArcGIS®, MapInfo®, Surfer for Windows®, and other GIS packages.”
“ESRI provides a full spectrum of ready-to-use, high-quality geospatial data for your GIS visualization and analysis projects.” Specific areas of data that are available to ArcGIS users for no additional cost include World imagery, streets and physical maps and Census TIGER files. Additional data sources available for a fee.
“geodata.gov is a geographic information system (GIS) portal, also known as the Geospatial One-Stop, that serves as a public gateway for improving access to geospatial information and data under the Geospatial One-Stop e-government initiative.”
A site that allows users to store, organize and share geodata.
GIS Data Depot
A site that includes both free and purchasable data sources at state and county level as well as data for other countries outside the U.S.
National Oceanographic Data Center
“The NODC archives and distributes global oceanographic data and information. The data is used to preserve a historical record of the Earth’s changing environment for ocean climate research, and for operational applications.”
GISDATA from USGS
“GISDATA is a place we provide access to geospatial datasets that have been specially prepared for seamless access and delivery. Some data serve many applications and have national extent. Other data were prepared for a particular time or event, and usually for a limited region.”
USC GIS Research Laboratory
Provides services on geocoding addresses, normalization and parsing of addresses, associating Census data with coordinate data, shortest distance calculations and polygon tracing.
“Free climate data for ecological modeling and GIS. WorldClim is a set of global climate layers (climate grids) with a spatial resolution of about 1 square kilometer. The data can be used for mapping and spatial modeling in a GIS or with other computer programs.”