Datasets 1-5 (of 11)

• bathy30  BATHY30 is a raster dataset of bathymetry and intertidal cover types for the Gulf of Maine developed by the U.S. Fish & Wildlife Service; Gulf of Maine Program. Sounding data was used in deeper areas to generate a relatively coarse resolution bathymetry grid. Finer spatial resolution around inshore features were achieved by use of tidal exposure classifications described from aerial photography (e.g., "regularly flooded, irregularly exposed, irregularly flooded") in the USFWS National Wetland Inventory datasets, channels and tidal flats mapped from photography in Maine's Coastal Marine Geologic Environments (CMGE), and Massachusetts orthophoto wetlands maps. These classes were not translated into absolute elevations, but instead were coded as to position within the intertidal zone, and the general cover type (e.g., high marsh, lower intertidal flats, etc.), which may convey useful ecological information. Where near shore subtidal bathymetry were inadequate, the grid was 'patched' using grids developed from scanned NOAA charts. For more information about the USFW Gulf of Maine Program and a CD of data from the Gulf of Maine Watershed Habitat Analysis plus supplemental information about BATHY30 see: http://gulfofmaine.fws.gov/ and http://r5gomp.fws.gov/gom/habitatstudy/metadata/gombathydoc.htm. - Download this layer
  
  
• bathym100  BATHYM100 contains bathymetry lines for the Gulf of Maine at a scale of 1:100,000 showing depth in 10 meter intervals. This dataset was developed by the Maine Geological Survey using USGS 30 X 60 minute series topographic-bathymetric maps. Bathymetric contours are coded with depth in feet (10 meter interval mean lower low water datum) Spatial topology varies from good to poor. - Download this layer
  
  
• contours  CONTOURS contains contour lines for Maine from USGS 1:24,000 scale quadrangles; in accordance with the source, units may be in feet or meters and intervals may be at 10 to 20 feet, or 3 meters. Additional supplementary contours exist on some of the quads. Due to the large number of arcs, elevation codes are spot checked from a representative sample. Please report any elevation coding errors to the Maine Office of GIS. The data retains the edgematching discrepancies existing in the source. - Download this layer
  
  
• contours_05222006  CONTOURS contains contour lines for Maine from USGS 1:24,000 scale quadrangles; in accordance with the source, units may be in feet or meters and intervals may be at 10 to 20 feet, or 3 meters. Additional supplementary contours exist on some of the quads. Due to the large number of arcs, elevation codes are spot checked from a representative sample. Please report any elevation coding errors to the Maine Office of GIS. The data retains the edgematching discrepancies existing in the source. - Download this layer
  
  
• gnis_h  gnis_h includes names and point locations of most hydrologic features in Maine, as shown on USGS 1:24,000 quadrangles. The Geographic Names Information System (GNIS) actively seeks data from and partnerships with Government agencies at all levels and other interested organizations. The GNIS is the Federal standard for geographic nomenclature. The U.S. Geological Survey developed the GNIS for the U.S. Board on Geographic Names, a Federal inter-agency body chartered by public law to maintain uniform feature name usage throughout the Government and to promulgate standard names to the public. The GNIS is the official repository of domestic geographic names data; the official vehicle for geographic names use by all departments of the Federal Government; and the source for applying geographic names to Federal electronic and printed products of all types. See http://geonames.usgs.gov for additional information. - Download this layer