State designated Wetlands as compiled by NYS Department of Environmental Conservation. This coverage provides a definitive inventory of state designated Wetlands (greater than 12.4 acres) in Westchester County. Coverage is 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. For more information go to the NYSDEC website, http://www.dec.state.ny.us.
This coverage was compiled at a scale of 1:24,000. The coverage is intended for general planning purposes only, and may not be be appropriate for site specific anaylsis.
Regulatory maps consist of mylar versions of New York State Department of Transportation 1 to 24,000 planimetric maps on which wetland boundaries and wetland identification codes are drawn. Regulatory wetland maps are prepared by NYSDEC and filed as required by the Freshwater Wetlands Act (Article 24 of the Environmental Conservation Law). As amendments to the official maps occur, the coverages are updated so that the GIS information reflects the regulatory maps currently in use. This coverage is in Arc/Info export format. Coordinate System- New York State Plane, FIPS zone: 3101 (Formerly East Zone 4801), Units: Feet, North American Datum 1983. This coverage can be accessed electronically by clicking on the above link, or by visit the Westchester County GIS web site to download this coverage along with additional Westchester County data layers. http://giswww.westchestergov.com
publication date
1. The documentation in the Entity and Attribute Overview section of the metadata and the README referred to in that section are integral parts of the Regulatory Freshwater Wetlands data. Failure to use the documentation in conjunction with the digital data constitutes a misuse of the data. 2. The digital freshwater wetlands data provided are not a legal substitute for the official Regulatory Freshwater Wetlands maps maintained by the Department of Environmental Conservation pursuant to Environmental Conservation Law Section 24-0301. Should a discrepancy exist between the digital data and the official maps, the official maps are the correct source of information. 3. The official regulatory freshwater wetlands maps may be amended from time to time; digital data obtained at an earlier date may therefore become obsolete. Digital data also may be altered independently of official map amendments in order to make improvements. These digital data cannot be relied on as a definitive statement of the location of freshwater wetlands. Wetland boundaries are subject to delineation by Department of Environmental Conservation regional personnel. 4. The borders of wetlands shown on both the official maps and the digital data are approximate at a scale of 1 to 24,000. Traditional cartographic or digital comparison of the wetland maps to mapped information that is collected and digitized at a larger scale than 1 to 24,000 is not cartographically acceptable and is subject to error.
625 Broadway, 5th Floor
See Entity and Attribute Information
See Process Description
See Currentness Reference
Wetland boundaries were delineated as "approximate" on 1 to 24,000 scale maps using a variety of methods, including aerial photographic interpretation, reference to published maps and field investigations. However, due to changes over time in the wetland resource, field verification of wetland boundaries is increasingly important. Digital wetland borders are derived from individual 1 to 24,000 quads, either by digitizing or by scanning followed by semi-automated raster to vector conversion. Quality assurance and quality control procedures included overlay of plot of digital boundaries on original source map with the condition for acceptance being no visible separation allowed between boundaries.
Spatial and attribute information
Wetland borders are derived from individual 1 to 24,000 quads, either by digitizing or by scanning followed by semi-automated raster to vector conversion. Labels are added and coded with the wetland identification and class. Annotation indicating the wetland identification code is also added. 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. Wetland class in the coverage is checked against an ASCII file derived from the official classification sheets. Class and wetland ID are added to arcs using an automated procedure that derives arc attribute values from polygon attribute values. Data are tiled as coverages showing wetlands of a single county. Detailed protocols are maintained by the Habitat Inventory Unit. For further information on related files and coverages, see the README file at http://cugir.mannlib.cornell.edu/READMES/fwrdme.html
Internal feature number.
ESRI
Feature geometry.
ESRI
Class I
Classification Sheets
Class II
Classification Sheets
Class III
Classification Sheets
Class IV
Classification Sheets
non-wetland features
DEC Habitat Inventory Unit internal documentation, "Procedures for Labels in Non-wetland Polygons"
wetlands that do not have a class
DEC Habitat Inventory Unit internal documentation, "Procedures for Labels in Non-wetland Polygons"
Internal node number for the beginning of an arc (from-node).
ESRI
Internal node number for the end of an arc (to-node).
ESRI
Internal node number for the left polygon.
ESRI
Internal node number for the right polygon.
ESRI
Length of feature in internal units.
ESRI
Internal feature number.
ESRI
User-defined feature number.
ESRI
Internal feature number.
ESRI
Feature geometry.
ESRI
Area of feature in internal units squared.
ESRI
Perimeter of feature in internal units.
ESRI
Internal feature number.
ESRI
User-defined feature number.
ESRI
148 Martine Avenue, Room 214
None
625 Broadway, 5th Floor