The Official Website of the Office of Geographic and Environmental Information (MassGIS)

 
   
 
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Free GIS data may be accessed from the individual datalayer description (metadata) pages.

MassGIS distributes vector data in Shapefile format and raster (image) data in TIFF, MrSID, JPEG 2000 and ERDAS Imagine formats.

Note on MassGIS data coordinate system/projection:
All data distributed by MassGIS are registered to the NAD83 datum, Massachusetts State Plane Mainland Zone coordinate system. Units are in meters. Please note that if you are using data in other projections or in other units (e.g. feet) your data will not be spatially aligned to MassGIS data unless your GIS software supports on-the-fly projection. Currently some shapefile .exes do not contain .prj files, which provides spatial reference information for ArcGIS 8.x and above.

Note on using MassGIS data:
When using MassGIS data on maps or in digital applications, source credit should be stated as "Office of Geographic and Environmental Information (MassGIS), Commonwealth of Massachusetts Executive Office of Environmental Affairs"


Other Useful Links:
  • Instructions
    • How to Access Data
    • Common Download Problems
    • A note to DXF users

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Last Updated 2/28/2007
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