Spring 2011 Rhode Island Department of Environmental Management Statewide Orthophotography

Multispectral (4-band), 6-inch spatial resolution orthorectified digital aerial photographs of the State of Rhode Island were collected April 29 - May 2, 2011. These images were contracted by a partnership consisting of the Rhode Island Department of Environmental Management, Rhode Island Department of Transportation, United States Geological Survey, and RIGIS.

More information about these images is available within this metadata record (traditional html, text, and xml metadata formats are also available).

This tile index shapefile is helpful for GIS users to display the location of each aerial photograph, helping to identify which to download. Most of the GeoTIFF formatted files are approximately 400 MB large (amounting to a total collection size of 607 GB), while the 10:1 compressed JPEG2000 formatted files are about 40 MB large (total collection size of 60 GB). The JPEG2000 file formatted files are of excellent quality and are recommended unless if you have a specific need for the larger file size.

 

Three options are available to traditionally download these images:

1) Download individual tiles using this map.

2) Download images on a municipal basis (download manager friendly).
Get started by selecting a municipality:

3) Download individual images or the entire collection of 1,630 images (download manager friendly).

 

Three options are available for viewing these images online, courtesy of the URI Geospatial Extension Program's Rhode Island Digital Atlas initiative:

1) Online Map: Rhode Island Aerial Photography (this map includes layers for most imagery available from RIGIS!).

2) Esri ArcGIS Server Map Services:
   - true color representation (also available as WMS, KMZ)
   - false color representation (also available as WMS, KMZ).

3) Esri ArcGIS Server Image Service (also available as WCS, WMS, KMZ).

Note: When in doubt, choose a map service since they're more responsive. For Esri ArcGIS users, the advantages of the image service include the ability to view particular spectral band combinations, adjust the appearance of the images, perform queries, use the images at larger map scales than these map services permit, and even download individual JPEG2000 tiles available from RIGIS. The trade-off of using the image service is that it will likely redraw more slowly than the map service while panning & zooming.