Datasets 1-5 (of 28)

• acfish2  ACFISH2 contains point locations of streams and rivers in Maine with runs and passages of anadromous and catadromous fish. Attributes include IDs for fish species and water body name. Data for this layer were screen digitized from Coastal Marine Resources Inventory (1981-84) and Ecological Characterization of Coastal Maine (1980) and were supplemented by USFW coverages WHYDRO and EHYDRO, provided by the Gulf of Maine Project office. The source for these dataset was Eipper, et al. 1982. Positional accuracy of this layer is unknown, probably best used at 1:100,000 scale or less. - Download this layer
  
  
• ashab3  ASHAB3 contains arcs representing important Atlantic Salmon habitat in Maine, suitable for mapping at 1:12,000 or smaller scale. This dataset was developed from field surveys conducted on the main stem and/or selected tributaries of the Aroostook, Dennys, Ducktrap, East Machias, Kennebec, Machias, Passagassawakeag, Penobscot, Pleasant, Presumpscot, Sheepscot, St. George, Tunk and Union Rivers in Maine by staff of the Maine Atlantic Salmon Commission and U.S. Fish and Wildlife Service. These surveys were conducted to identify important Atlantic salmon habitat including spawning and rearing areas. The majority of the survey data was collected using Trimble Pro, Pro-XL and GeoExplorer3 receivers and survey files were differentially corrected to provide 2-5 meter accuracy. Surveys for some reaches were collected with minimal or no GPS control points and the attributes were overlaid on a stream centerline created using either a GPS-acquired line, a line derived from MEGIS/USGS 1:24,000 hydrography data, or a line drawn as a centerline based on MEGIS 1-meter Digital Orthophotography. The dataset includes information on habitat categories and areas, and an indication of spawning and rearing potential, as well as detailed attribute information concerning stream dimensions, substrates, vegetation, and other stream characteristics. - Download this layer
  
  
• biophy  BIOPHY depicts boundaries of 15 Biophysical Regions in Maine at 1:250,000 scale. The regions were developed in a statewide classification (McMahon, 1990) by Janet McMahon who examined spatial patterns in a number of mapped environmental variables. These patterns were statistically evaluated using canonical correspondence analysis. Ordinations of 1,966 samples, 95 woody taxa, and 22 environmental variables, reveal that both biophysical regions and woody species vary primarily along a climatic gradient of increasing annual temperature, potential evapotransportation, heat sum, and other factors associated with temperature. Boundaries were mapped for 'Biophysical Regions of Maine' at 1:700000 scale by Maine State Planning Office (MESPO) staff in 1990. Maine Office of Geographic Information Systems (MEGIS) staff digitized these boundaries from the 1990 publication, recompiling the data onto a 1:250,000 scale base. The state boundary and coastline were extracted from the coverage METWP250. Each region contains attribute fields extracted from a summary table on the 1990 publication. The coverage was renamed from BIOPHY250 to BIOPHY in 2001.
  
  
• class03e  CLASS03E is a REGIONS dataset and contains status of molluscan shellfish growing area classifications for the coast of Maine, as of July 2003, east of Fort Point Stockton Springs, excluding Islesboro, Vinalhaven, and North Haven, suitable for mapping at 1:24,000 scale. Area boundaries are based on descriptions contained in legal notices, which are published as changes occur. POLYGON codes include CLOSURE area number, CLASSIFICATION, and ACRES. ARC coding distinguishes the 1:24000 coastline from screen digitized classification lines. - Download this layer
  
  
• class03w  CLASS03W is a REGIONS dataset that contains status, July 2003, of molluscan shellfish growing area classifications for the Maine coast west of Fort Point Stockton Springs, suitable for mapping at 1:24,000 scale. The dataset also includes molluscan shellfish growing areas for Islesboro, Vinalhaven, and North Haven. Area boundaries are based on descriptions contained in legal notices, which are published as changes occur. POLYGON codes include CLOSURE area number, CLASSIFICATION, and ACRES. ARC coding distinguishes the 1:24000 coastline from screen digitized classification lines. - Download this layer