2011 RIDEM Digital True Color Orthophotography

Contributor: 
Rhode Island Department of Environmental Management
U.S. Geological Survey

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. These images are available from RIGIS in both GeoTIFF and JPEG2000 (JP2) formats.

This tile index shapefile is helpful for GIS users to display the approximate location of each aerial photograph, helping to identify which images to download. This index shapefile is the same for both GeoTIFF and JP2 images. 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 for downloading these images:

1) Download individual tiles using this interactive web map: GeoTIFF and JPEG2000

2) Download tiles on a municipal basis using the dropdown menu at the bottom of this page (download manager friendly)

3) Download individual images, or the entire collection of images: GeoTIFF and JPEG2000 (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 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 the same 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.

Publish Date: 
12/2011

2011 JPEG2000 Municipal Download

2011 GeoTIFF Municipal Download