Notes:

• Each "TIFF", "MrSID" or "JPEG 2000" link below leads to a listing of downloadable images (may take several seconds to load).
• The smaller the resolution, the clearer the images will appear when zoomed in to large scales.
• Most images are tiled by the Orthophoto Quad Index (4 km. x 4 km. tiles named according to the 5- or 6-digit ID).
  See this index to determine which image tiles to download, or download a .dbf file of tile IDs and corresponding towns.
  (See link below for NOAA Charts' tiling scheme).
• All imagery is referenced to the Massachusetts State Plane Mainland NAD83 Meters coordinate system (Fipszone 2001). Imagery for Martha's Vineyard and Nantucket is also available in Island Zone (Fipszone 2002) where indicated with * ; Island Zone imagery is tiled by the OQISLE index layer.
• All imagery is available statewide unless indicated with a "Status Map" link.
• See the Introduction to MrSID page for details on viewing and using MrSID imagery.
• See the Introduction to JPEG 2000 page for details on viewing and using JPEG 2000 imagery.
• Please note that storing the files in a folder that contains a dot (period) in the folder name may result in improper registration of the images in GIS software.

• For Tiffs - download the .tif (image), .tfw (header) and .aux (spatial reference for ArcGIS) files.
• For MrSIDs - download the .sid (image), .sdw (header) and .aux (spatial reference for ArcGIS) files.
• For JPEG 2000 - download the .jp2 (image), .j2w (header) and .aux (spatial reference for ArcGIS) files.
• Approximate file size for each image appears in parentheses after each download link.
• Note that the header ("world") files are not used by all software.
  

Click on thumbnail image for a larger sample.

	USGS Color Ortho Imagery (2008)  [ Datalayer Description ] Compressed from original 30cm and 15cm resolution GeoTIFFs (refer to the 8-digit tile numbers on the index): 30cm MrSID (4 to 5 MB) 15cm MrSID (10 to 20 MB) Note: DBF image catalogs are also stored on the ftp server
	1:5,000 Color Ortho Imagery (2005)  [ Datalayer Description ] Compressed from original 1/2-meter resolution GeoTIFFs: MrSID (10 MB): Original | Contrast Stretched JPEG 2000 (15 MB): Original | Contrast Stretched What's the difference between the Original and Contrast Stretched imagery? Note: DBF image catalogs are also stored on the ftp server
	1:5,000 Color Ortho Imagery (2001, 2003)  [ Datalayer Description ] 1/2-meter resolution: MrSID (10.5 MB) 1-meter resolution: MrSID  (2.5 MB)
	1:5,000 Black & White Digital Orthophoto Images (1992-1999)  [ Datalayer Description ] 1/2-meter resolution: MrSID  (4.3 MB) * 1-meter resolution: TIFF  (16 MB) | MrSID  (1 MB) * 2-meter resolution: TIFF  (4 MB) * 5-meter resolution: TIFF  (640 KB) *
	1:10,000 Coastal Color Ortho Images (1994)  [ Datalayer Description | Index Map ] 1-meter resolution: MrSID  (2 MB)
	1:12,000 USGS Black & White Digital Ortho Images (1992, 1995)  [ Datalayer Description | Status Map ] 1-meter resolution: TIFF  (16 MB) 2-meter resolution: TIFF  (4 MB) 5-meter resolution: TIFF  (640 KB)
	Scanned 1:25,000 USGS Topographic Quad Images  [ Datalayer Description ] MrSID  (330 KB) TIFF  (2 MB) *
	Scanned NOAA Nautical Charts  [ Datalayer Description | Index List ] MrSID  (size varies) TIFF  (size varies)
	Shaded Relief (1:5,000)  [ Datalayer Description ] MrSID in .exe file, with metadata and ArcGIS 9.0 layer file (67 MB)
	Crop Evapotranspiration and Potential Evaporation Grids  [ Datalayer Description ] Exported (.e00) ESRI Grids in .exe file (1 MB)
	Impervious Surface Images  [ Datalayer Description ] ERDAS Imagine (.img) Images in self-extracting .exes (3 - 25 MB for each .exe)

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Last Updated 12/10/2007. Send Questions/Comments to michael.trust@state.ma.us
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