Downloads
Overview
The polygon feature class, named COQ2025INDEX_POLY, is an index for the original spring 2025 GeoTiff images and the MassGIS-produced JPEG 2000 images. It contains a field to store the Web links for the JPEG 2000 free downloads. Each tile in the 18N and 19N UTM Zones measures 1,500 m x 1,500 m. The tiles on Cape Cod measure 750 m x 750 m.
Production
The index polygons were delivered to MassGIS with the 2025 imagery from vendor NV5, one index for each of the two UTM Zones (18N and 19N) that cover Massachusetts, and a separate shapefile with the Cape Cod delivery area. MassGIS projected each layer to the NAD 1983 Mass. State Plane Mainland Meters coordinate system and merged them into this one feature class, and added some attribute fields. Note that MassGIS did not project the imagery; all imagery was kept in the original UTM projections as delivered by NV5.
Attributes
The COQ2025INDEX_POLY polygon attribute table contains the following fields:
| Field | Description |
|---|---|
| TILENAME | Unique 11-character ID for each 1,500 m x 1,500 m tile. Image names that begin with "18" are referenced to the UTM NAD 1983 (2011) Zone 18N coordinate system. Image names that begin with "19" are referenced to the UTM NAD 1983 (2011) Zone 19N coordinate system. For tiles on Cape Cod, the IDs are 14 characters and include a directional ("_NE","_NW", "_SE", "_SW") for each 750 m x 750 m tile. |
| URL | Web link for downloading JPEG 2000 tiles |
| ZONE | UTM Zone |
Maintenance
MassGIS maintains this layer. No updates are planned.
| Date published: | March 30, 2026 |
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