Extensive field surveys began in 1993 to identify, map, and document use of feeding and roosting areas for shorebirds. Areas are labeled as feeding sites, roosting sites or both. Polygon boundaries have been modified by the Maine DEP to align with the state 1:24,000 coastline. Polygons have been modified by Maine Department of Inland Fisheries & Wildlife to include 100 ft and 250 ft disturbance protection zones around feeding and roosting sites, respectively, and to better align habitat boundaries with natural features based on high resolution, low tide imagery from Maine DMR. Areas of extensive development were clipped from the 250 ft. disturbance protection zones around roosting areas.
METWP24 depicts political boundaries, common town names, and geocodes for Maine at 1:24,000 scale. The coverage was created from USGS, 7.5 minute map series, town boundaries. The Maine GIS base layer COAST, which contains Maine's coastal Mean High Water (MHW) mark and Maine islands, was used in the development of METWP24. To correct mapping errors and reflect recent changes to Minor Civil Division (MCD) boundaries, arcs and polygons have been added to or updated in METWP24 from: photorevised USGS data; Maine GIS base layer coincident features; legal descriptions; GPS data; and Maine Department of Transportation (MEDOT) engineering plans. METWP24 contains USGS 1:100,000 scale data and U.S. Department of Commerce, Bureau of Census, TIGER Line Files 1990 and 2000 where these provide a more correct or best available representation of a dataset feature.
Razor_clams is a REGIONS dataset and contains distribution information for razor clam (Ensis directus) for the coast of Maine . Polygons are based on locations indicated by town officials, harvesters, Harbormasters, DMR biologists, DMR specialists or DMR scientists from February 2008 to May 2009. POLYGON codes include: Town, County, Species, NOAA_Chart, Updated, Shape, ACRES, OBJECTID, SHAPE_AREA, SHAPE_LEN, and Source.
Bathymetric contours for the Gulf of Maine from USGS. These data were created from a DEM which was based on numerous input layers. For complete details, see:
Input data includes:
1. NOAA Hydrographic Survey Data and NGDC Marine Trackline Geophysics Data
2. Naval Oceanographic Office DBDB-V gridded bathymetry
3. Datasets from Bedford Institute of Oceanography and Brookhaven National Laboratory
4. NOAA Medium Resolution Digital Shoreline and DMA World Vector Shoreline
5. Defense Mapping Agency ETOPO5 Digital Relief of the Surface of the Earth
6. GEBCO General Bathymetric Chart of the Oceans
7. USGS North American 30 Arc-Second DEM