Description: CriticalHabitatWatershedOccupation is a digital hydrologic unit boundary layer of Level 5 (10-digit) WATERSHEDs for Maine that describe salmon critical habitat occupation status. The source data was developed by adding to the MeGIS Level 5 HUC 10 database, thus extending the spatial depiction of Watershed boundary regions to describe occupation status of salmon in Maine.
Copyright Text: The U.S. Department of Agriculture, Natural Resources Conservation Service, should be acknowledged as the data source in products derived from these data. Also, NOAA's National Marine Fisheries Service (NMFS) should be acknowledged as the data source for Critical Habitat information about Atlantic salmon.
Description: This data set contains Tidal Waterfowl / Wading bird Habitat (TWWH) polygons rated as HIGH or MODERATE value under Maine's Natural Resources Protection Act (NRPA). Polygons classified as emergent wetland (saltmarsh) were obtained from the U.S. Fish & Wildlife Service's National Wetlands Inventory (NWI), which were mapped at 1:24,000 scale. Polygons classified as mussel bars or mudflat were obtained from the Maine Coastal Marine Geologic Environments (CMGES) data from 1976. Some of the CMGES data originated from 1:24,000 scale quads; other data originated from 1:50,000 scale quads. Polygons classified as eelgrass beds were obtained from the Department of Marine Resources 2010 eelgrass data. A conservative estimate of the minimum mapping unit for the eelgrass data is 150 square meters, which represents an eelgrass staand of approximately 14 meters in diameter. Eelgrass areas with <10% covereage density were excluded from the TWWH data set. The boundary and classification accuracy each polygon is dependent upon its data source.
Copyright Text: Maine Department of Inland Fisheries and Wildlife (MDIFW), Resource Assessment Section, Habitat Group
Description: 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.
Copyright Text: Credit should always be given to the data source and/or originator when the data is transferred or printed.