In Spring 2019, with funding from several State partners, MassGIS contracted with the U.S. Geological Survey\n for statewide, 15 cm resolution, 16-bit, 4-band (RGB-IR) digital \northophotos. The data were delivered in early 2020 as 10,218 individual \n1,500 m x 1,500 m tiles in a GeoTIFF format. To allow for easier \ndistribution of this free imagery, MassGIS compressed the GeoTIFFS into \nthe JPEG 2000 format, which retains the IR band. This hosted tile service was created\n using JPEG 2000 versions of the imagery.
Project specifications are based on the American Society of Photogrammetry and Remote Sensing\n (ASPRS) standards. The data were developed based on a horizontal \nprojection/datum of NAD 1983 2011 UTM zones 18N and 19N meters and a \nvertical projection/datum of NAVD 88 (GEOID 12B) meters.
This \ndigital orthoimagery was created to provide easily accessible geospatial\n data which are readily available to enhance the capability of federal, \nstate, and local emergency responders, as well as to plan for homeland \nsecurity efforts. These data also support The National Map.
These\n images can serve a variety of purposes, from general planning to field \nreference for spatial analysis, to a tool for data development and \nrevision of vector maps. The imagery can also serve as a reference layer\n or basemap for myriad applications inside geographic information system\n (GIS) software and web-based maps.
For more information see the imagery's MassGIS metadata page.
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