Regulatory Freshwater Wetlands


      Originator: New York State Department of Environmental Conservation
      Publication_Date: 1994
      Title: Regulatory Freshwater Wetlands - Albany County
      Edition: 1.0
      Geospatial_Data_Presentation_Form: Map
        Publication_Place: Albany, NY
        Publisher: New York State Department of Environmental Conservation (NYSDEC)
    Abstract: This data set is an ARC/INFO coverage composed of polygonal and linear features. Coverages are based on official New York State freshwater wetlands maps as described in Article 24-0301 of the Environmental Conservation Law. Coverages are not, however, a legal substitute for the official maps.
    Supplemental_Information: Regulatory maps consist of mylar versions of New York State Department of Transportation 1:24,000 planimetric maps on which wetland borders and wetland identification codes are drawn. Planimetric maps are generally congruent with and have the same quad names as United States Geological Survey 7.5 minute topographic maps; a few of the Department of Transportation quads have extended borders. Regulatory wetland maps are prepared by NYSDEC and filed as required by the Freshwater Wetlands Act (Article 24 of the Environmental Conservation Law) and implementing regulations. Associated with the maps are Classification Sheets that list the Wetlands Identification Code, the municipality in which the wetland occurs and the regulatory class of each wetland. Preparation and filing dates vary by county. As amendments to the official maps occur, the coverages are updated so that the GIS information reflects the regulatory maps currently in use. Archive copies of county coverages with previous versions of the official maps are kept. An important feature of the official maps is that the lines indicate only "the approximate location of the actual boundaries of the wetlands" (ECL §24-0301(3)). For a final determination of the actual location of a wetland it is necessary to contact the NYSDEC office for the region in which the wetland occurs. Scale: 1:24000
        Beginning_Date: 1995
        Ending_Date: present
    Progress: In work
    Maintenance_and_Update_Frequency: Continually
      West_Bounding_Coordinate: -74.2355
      East_Bounding_Coordinate: -73.7029
      North_Bounding_Coordinate: 42.8153
      South_Bounding_Coordinate: 42.4215
      Theme_Keyword_Thesaurus: NYS GIS Clearinghouse categories
      Theme_Keyword: wetlands
      Theme_Keyword_Thesaurus: none
      Theme_Keyword: ARC/INFO coverage, Freshwater Wetlands, Regulatory
      Place_Keyword_Thesaurus: None
      Place_Keyword: Albany County, New York
Access_Constraints: Regulatory Freshwater Wetlands are not copyrighted by the New York State
Use_Constraints: Regulatory Freshwater Wetlands are not copyrighted by the New York State Department


Logical_Consistency_Report: The quads comprising a county are edge matched and map joined to form a county coverage. Quadrangle borders of wetlands that cross quads are dissolved away. Where contiguous wetlands on adjacent regulatory quad sheets do not match, arcs are added along the quad border between the wetland pieces on either side of the border so that a continuous polygon is formed. The same treatment is given to mismatches along county borders. Errors in the regulatory maps, such as mismatches along quad borders or duplicate wetlands identification codes are digitized faithfully. A list of errors is maintained by the Habitat Inventory Unit.
Completeness_Report: This coverage is complete as of December 1994; coverages are updated shortly after official amendments.
      Horizontal_Positional_Accuracy_Report: Wetland borders are derived from individual 1:24,000 quads, either by digitizing or by scanning followed by semi-automated raster to vector conversion.
      Horizontal_Positional_Accuracy_Value: +/- 15 meters
      Horizontal_Positional_Accuracy_Explanation: Based on the scale of the source map documents and the placement of Regulatory Freshwater Wetlands by "best-visual-fit" for detail sheets, the horizontal positional accuracy is estimated to be within the range of +/- 15 meters.
      Process_Date: 1994




        Grid_Coordinate_System_Name: Universal Transverse Mercator
          UTM_Zone_Number: 18
            Scale_Factor_at_Central_Meridian: .9996
            Longitude_of_Central_Meridian: -75.0
            Latitude_of_Projection_Origin: 0.0
            False_Easting: 500000.0
            False_Northing: 0.0
        Planar_Coordinate_Encoding_Method: coordinate pair
          Abscissa_Resolution: .61
          Ordinate_Resolution: .61
        Planar_Distance_Units: meters
      Horizontal_Datum_Name: North American Datum of 1927
      Ellipsoid_Name: Clarke 1866
      Semi-major_Axis: 6378206.4
      Denominator_of_Flattening_Ratio: 294.98


        Contact_Organization: New York State Department of Environmental Conservation - Division of fish, Wildlife, Marine Resources
        Contact_Person: Gerald P. Rasmussen
        Address_Type: mailing and physical address
        Address: 700 Troy-Schenectady Road
        City: Latham
        State_or_Province: NY
        Postal_Code: 12110
        Country: USA
      Contact_Voice_Telephone: (518) 783-5733
      Contact_Facsimile_Telephone: (518) 783-3916
      Contact_Electronic_Mail_Address: gerald.rasmussen@dec.mailnet.state.ny
Distribution_Liability: Although this data has been processed successfully on a computer system at the New York State Department of Environmental Conservation, no warranty expressed or implied is made by NYSDEC regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. The NYSDEC warrants the delivery of this product in a machine readable format and will replace damaged media.


Metadata_Date: 19981023
        Contact_Person: Larry Alber
          Address_Type: mailing and physical address
          Address: 50 Wolf Road
          City: Albany
          State_or_Province: NY
          Postal_Code: 12205
          Country: USA
      Contact_Voice_Telephone: (518) 457-3143
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998