There are 14 eelgrass data layers from several sources and each has been categorized as either "Current" (generated after 1992) or "Historical" (generated before 1992) data. They are also projected into RI State Plane Feet NAD83. Below is the name of the data layer as it appears on the maps, a link to its metadata, a description of the layer and its source, and a link to download its file. At the bottom of this page is a list of other data used in the project and links to their files and/or metadata.

Data Layer	Metadata	Description	Files
Current URI/NRS Eelgrass Polygons	Metadata	2000 URI Natural Resources Science field data and aerial interpretation of Ninigret Pond.	ninigret.e00 (7 kb) e00 urinrs_shp.zip (6 kb) shp
Data Layer	Metadata	Description	Files
Current URI/GSO Ninigret Pond Eelgrass Densities	Metadata	2000 URI Graduate School of Oceanography interpolated grid data of Ninigret Pond.	ninigrid_shp.zip (264 kb) shp
Current URI/GSO Quonochontaug Pond Eelgrass Densities	Metadata	2000 URI Graduate School of Oceanography interpolated grid data of Quonochontaug Pond	quonniegrid_shp.zip (23 kb) shp
Data Layer	Metadata	Description	Files
Current URI/GSO Quonochontaug Pond Eelgrass Polygons	Metadata	2000 URI Graduate School of Oceanography general eelgrass survey of Quonochontaug Pond. Not geographically referenced; extents are only approximations.	fordpolys_shp.zip (6 kb) shp
Data Layer	Metadata	Description	Files
Current CRMC Eelgrass Polygons	Metadata	1999-2000 CRMC & RIDEM shoreline eelgrass survey.	crmcpolys_shp.zip (2 kb) shp
Current CRMC Eelgrass Lines	Metadata	1999-2000 CRMC & RIDEM shoreline eelgrass survey.	crmclines_shp.zip (10 kb) shp
Current CRMC Eelgrass Points	Metadata	1999-2000 CRMC & RIDEM shoreline eelgrass survey.	crmcpts_shp.zip (2 kb) shp
Current Block Island Eelgrass Lines	Metadata	1999-2000 CRMC & RIDEM shoreline eelgrass survey.	crmcbi_shp.zip (6 kb) shp
Data Layer	Metadata	Description	Files
Current RIDEM/F&W Eelgrass Points	Metadata	1999-2000 RI DEM Department of Fish & Wildlife eelgrass points taken from field observations in Narragansett Bay. Not geographically referenced; extents are only approximations.	dfwpts.e00 (26 kb) e00
Data Layer	Metadata	Description	Files
Current NBEP Eelgrass Polygons	Metadata	1996 Narragansett Bay Estuary Program polygon data from 1996 true color aerial photography delineation. Synonymous with RIGIS data.	nbeppolys_shp.zip (17kb) shp
Current NBEP Eelgrass Lines	Metadata	1996 Narragansett Bay Estuary Program line data from 1996 true color aerial photography delineation. Synonymous with RIGIS data.	nbeplines_shp.zip(2kb) shp
Data Layer	Metadata	Description	Files
Historical NBP Eelgrass Polygons	Metadata	1988 Narragansett Bay Project polygon data from 1988 aerial photography delineation.	Narrbayproj_shp.zip (32 kb) shp
Data Layer	Metadata	Description	Files
Historical RIAF Eelgrass Points	Metadata	1848-1994 Rhode Island Aqua Fund historical point data. Collected from personal accounts (P), herbarium specimens (H), literature review (L), or NOAA charts (C).	riafpts_shp.zip (12 kb) shp
Historical RIAF Eelgrass Polygons	Metadata	1848-1994 Rhode Island Aqua Fund historical polygon data. Collected from personal accounts (P), herbarium specimens (H), literature review (L), or NOAA charts (C).	FILE

The following layers are also included for reference:

• Bathymetry Grid Model - bathyzip.zip (15 Mb) - metadata
• State and Town Boundaries - available from RIGIS
• Major and All Roads - available from RIGIS
• Water Classification (RIDEM) & Types (CRMC) - available from RIGIS (see also classification descriptions)
• Major Rivers, Primary Streams, and Ponds - available from RIGIS
• Narragansett Bay National Estuarine Research Reserve Boundary - nbnerr_bndy_shp.zip (9kb)
• NOAA Nautical Charts - available from RIGIS