June 2012 Rhode Island Eelgrass Mapping Task Force Orthophotography

Multispectral (4-band), 0.5-meter spatial resolution orthorectified digital aerial photographs of Narragansett Bay, Rhode Island coastal waters, and some inland areas were collected June 26 & 28, 2012. These images were contracted by the Rhode Island Eelgrass Mapping Task Force in partnership with the National Oceanic and Atmospheric Administration (NOAA), and with the support of the Rhode Island Habitat Restoration Trust Fund.

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 76 MB large (amounting to a total collection size of 101 GB), while the ~10:1 compressed JPEG2000 formatted files are about 7 MB large (total collection size of 11 GB). The JPEG2000 file formatted files 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: Barrington Bristol Charlestown Cranston East Greenwich East Providence Exeter Hopkinton Jamestown Johnston Little Compton Middletown Narragansett New Shoreham Newport North Kingstown North Providence Pawtucket Portsmouth Providence Richmond South Kingstown Tiverton Warren Warwick West Warwick Westerly

3) Download individual images or the entire collection of 1,396 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.