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GIS Data and Websites

Where can you get data to use in a GIS? The UM Libraries have geospatial data in the collections, many websites have free data, and data can also be purchased.


Some of the databases that the UM Libraries subscribe to contain data that can be exported into a GIS.

CD collection at McKeldin

McKeldin Library is a Federal Depository Library, so we receive government information for our collection.  Often this is in the format of CDs that contain geospatial data.  Also, we sometimes buy GIS data on CDs.  CDs containing GIS data can be found through the catalog, and are physically stored on the fourth floor of McKeldin Library in the computer, GIS and microforms lab.  To access data on CDs, you will need to know the call number, and you can ask at the Information Desk for the cabinets to be unlocked for you.  There are also two workstations with ArcGIS 9.3 in the fourth floor lab.

Some of our most-used CDs with GIS data include:

  • ESRI Data and Maps
  • ArcUSA 1:2M Coterminous U.S.
  • ArcWorld 1.3M Continental Coverage
  • Digital Chart of the World
  • Datamocracy GIS Bundles For MD, VA, DC, DE, WV, and KY
  • Digital Line Graph (DLG) Data
  • CensusCD: Neighborhood Change Database
  • CensusCD 1970 and CensusCD 1980
  • Business demographics 2007
  • CrimeReportsCD
  • DRG’s (Digital Raster Graphics)
  • Scanned Images of USGS 7.5’ Topographic Quadrangles (Prince Georges & Montgomery Counties, MD)
  • US Digital Topography for GIS
  • US Digital Orthophoto Quadrangle Data
  • DHCD Technology Toolbox Data: Historic Sites Layer 
  • City of Baltimore GIS Data