Description: The Address Point file was downloaded from NYS GIS Clearinghouse at https://data.gis.ny.gov/datasets/dfa176b4cf284539812c05478dc028d2/about on May 30, 2024. The data is used for the AddressPoints Locator, as part of Enterprise Geocoding Service.
Service Item Id: d8a3f59d8a724b9d8a57e5a3f78fbb12
Copyright Text: New York State Office of Information Technology Services
Description: Data was last processed in March 2025. This layer represents 2023 tax parcel polygons in Westchester County. It was assembled from the collection of tax parcel assessment information of 25 different municipal jurisdictions. Assessment data is from ORPTS 2023 assessment. NOTE: Overlaps and gaps do exist between municipalities due to the fact that each municipal assessment jurisdiction maintains their own data.
Description: MS4 is short for "Municipal Separate Storm Sewer System". The consortium is made up of 17 municipalities within the county (note that consortium municipalities do change often). This data was collected by Dolph Rotfeld Engineering and Stellar Services. The type of drainstructure can be found in the field "Structure_WC" (alias "STRUCTURE"). It includes catch basin, culvert, draingage manhole, inlet point, open drain, outfal, other/unknown, and outfall/interconnect.It was prepared for Westchetser County Government, Department of Public Works and Transportation in 2020.Some features may be in municipalities that are non-consortium becasue of error or miscommunication on where the municipality boundaries are located (In field error).
Service Item Id: d8a3f59d8a724b9d8a57e5a3f78fbb12
Copyright Text: Dolph Rotfeld Engineering and Stellar
Description: This data is a collection of sanitary sewer manholes within Westchester County (excluding manholes on the Westchester County Trunkline). The data was initially digitized from the early 1990's Sanitary Sewer Evaluation Study (SSIS) and then augmented with more recent and up to date data from local governments where available. As of October 5, 2015 this is the most up to date version of the sewer manholes available.
Service Item Id: d8a3f59d8a724b9d8a57e5a3f78fbb12
Copyright Text: Westchester County, City of Mount Vernon, Town of Cortlandt, Village of Briarcliff Manor, Village of Buchanan, Village of Croton, Village of Irvington, Village of Larchmont, Town of Mamaroneck, Village of Mount Kisco, Town of North Castle, Village of Ossining, Village of Pleasantville, City of Rye, City of Yonkers and Town of Somers
Description: This data is a collection of sanitary sewer mains within Westchester County (excluding the Westchester County Trunkline). The data was initially digitized from the early 1990's Sanitary Sewer Evaluation Study (SSIS) and then augmented with more recent and up to date data from local governments where available. As of October 5, 2015 this is the most up to date version of the sewer mains available.
Service Item Id: d8a3f59d8a724b9d8a57e5a3f78fbb12
Copyright Text: Westchester County, City of Mount Vernon, Town of Cortlandt, Village of Briarcliff Manor, Village of Buchanan, Village of Croton, Village of Irvington, Village of Larchmont, Town of Mamaroneck, Village of Mount Kisco, Town of North Castle, Village of Ossining, Village of Pleasantville, City of Rye, City of Yonkers and Town of Somers
Description: July 2024. This point feature class shows the address locations of septic tank pump out in 2023. The location points include the tax parcel and street-level geocoding results. Data is extracted from the Digital Health pomp report database maintained by the DOIT Human and Health Services team. Watershed names have been added to the attribute table.
Service Item Id: d8a3f59d8a724b9d8a57e5a3f78fbb12
Copyright Text: Data is extracted from Digital Health pump out report database maintained by DOIT Human and Health Services team.
Description: This point feature class shows the address locations of septic tank pump out in 2022. The location points include the tax parcel and street level geocoding results. Data is extracted from Digital Health pump out report database maintained by DOIT Human and Health Services team. Watershed names have been added to the attribute table. Updated in May, 2023.
Service Item Id: d8a3f59d8a724b9d8a57e5a3f78fbb12
Copyright Text: Data is extracted from Digital Health pump out report database maintained by DOIT Human and Health Services team.
Description: April 2022. This point feature class shows the address locations of septic tank pump out in 2021. The location points include the tax parcel and street level geocoding results. Data is extracted from Digital Health pomp out report database maintained by DOIT Human and Health Services team. Watershed names have been added to the attribute table.
Service Item Id: d8a3f59d8a724b9d8a57e5a3f78fbb12
Copyright Text: Data is extracted from Digital Health pump out report database maintained by DOIT Human and Health Services team.
Description: February 2021. This point feature class shows the address locations of septic tanks in 2020. Data is extracted from Digital Health pomp out report database maintained by DOIT Human and Health Services team.Watershed names have been added to the attribute table.
Service Item Id: d8a3f59d8a724b9d8a57e5a3f78fbb12
Copyright Text: Data is extracted from Digital Health pump out report database maintained by DOIT Human and Health Services team.
Description: This file contains polygon data representing service areas that are part of public water supply systems within Westchester County, New York, based upon geographic data in GIS or CAD format provided by water supply systems and integrated into a common countywide feature class in 2012. Not all areas in the county served by public water supply systems are covered, and the accuracy of the geographic representations and attributes included in this dataset is dependent upon the accuracy of the source data, which has not been independently verified by Westchester GIS .
Description: Data layer derived from sewer districts mapped by the Department of Planning in 1997. Data was updated in 2022 to reflect all of the available Board of Legislators (BOL) approved additions and take-outs to the mid of 2022 (summer). Updates also include district boundaries updates in June 2015 to conform to new Westchester County Municipal Boundaries data layer updated in 2014.
Description: Data obtained from New York State Geological Survey. For more information contact: http://www.nysm.nysed.gov/geology.html Coverage identifies only broad classifications of Surficial Geology in County.
Description: Data obtained from New York State Geological Survey. Coverage identifies only broad classifications of Surficial Geology in County. For more information contact: http://www.nysm.nysed.gov/geology.html
Description: This data represents established channel lines under Westchester County jurisdiction. County channel lines are established along entire lengths or sections of rivers and streams that are administered and maintained by County Department of Public Works.
Description: County-wide drainage basin boundaries automated (1992) from Westchester County Environmental Planning Atlas Hydrologic Features Map (1:24,000). Updated (2012) to include new sub-basins delineated in the Bronx River Basin by the Center for Watershed Protection (2007-2008).
Description: Dataset consist of statutory boundaries of Significant Coastal Fish and Wildlife Habitats (SCFWH) as identified and recommended by Environmental Conservation and designated by Department of State. All SCFWH areas are found within the federally approved Coastal Area Boundary (CAB) of New York State. Original data was hand-drawn over DOT topographic quadrangle sections and filed with local governments. Digital data set (version 1.1) was previewed by NYS DEC Habitat Inventory Unit and subsequently corrected as per their recommendations. The original digital version of the SCFWHs, Version 1.2, has been replaced with this current version 2.0. Version 2.0 includes changes/updates to the Peconic estuary (2002), north shore of Long Island (2005), the south shore of Long Island (2008), and the Hudson River (2012). Scale: 1:24000. Data was last revised by the NYS Clearinghouse Office of Planning and Development August, 2013.
The data was downloaded from the New York State GIS Clearinghouse September 2015.
Description: This data layer represents a compilation of local zoning districts and is based on zoning information compiled and digitized from each of Westchester's 43 municipalities between 2011 and 2024. It is important to note that it is not an officially adopted map of local zoning, but rather a depiction - or "snapshot" - of local zoning at the time of compilation. As such, this data layer is intended to be used for general reference purposes only. Since local zoning is constantly subject to change, inquiries regarding current status of local zoning districts, zoning designations of specific parcels, and exact use and bulk requirements should be verified at the local level by contacting the local planning or municipal clerk’s office. Selected updates were completed for this data layer in 2015 and 2016 for the municipalities of Rye City, Town of North Castle, Village of Mamaroneck and Port Chester. Updates for the City of Mount Vernon were completed in April 2021. In 2022/2023 Westchester County conducted an outreach project to obtain updated data. The following municipalities were updated during this time: Ardsley, Dobbs Ferry, Greenburgh, Lewisboro, Mount Pleasant, North Salem, New Castle, Village of Ossining, and Peekskill. Updates for Briarcliff Manor and Buchanan were made in 2024. Buchanan has one overlay district which is an exception because no other polygons should be overlapping.
Service Item Id: d8a3f59d8a724b9d8a57e5a3f78fbb12
Copyright Text: Westchester County Department of Planning
Description: This data layer shows the locations of active petroleum bulk stograge locations in Westchester County current to June 2017. the data was extractted from Digital health database maintianed by DOIT HHS (Health and Human Services)team and was delivered to GIS on June 9th 2017.
The [Grade] attribute interpritation indicate different levels of spacial accuracy:
A- The address locacition is matched to an exact parcel centriod.
B- The address location is matched to the calculated street centerline location based on the address range.
C- Athe address location is matched to the zip code centroid.
Service Item Id: d8a3f59d8a724b9d8a57e5a3f78fbb12
Copyright Text: The data was extractted from Digital health database maintianed by DOIT HHS (Health and Human Services) team and was delivered to GIS on June 9th 2017.
Color:
[0, 77, 168, 255] Background Color: N/A Outline Color: N/A Vertical Alignment: bottom Horizontal Alignment: center Right to Left: false Angle: 0 XOffset: 0 YOffset: 0 Size: 8 Font Family: Arial Font Style: normal Font Weight: normal Font Decoration: none
Description: This data set is a digital soil survey and generally is the most detailed level of soil geographic data developed by the National Cooperative Soil Survey. The information was prepared by digitizing maps, by compiling information onto a planimetric correct base and digitizing, or by revising digitized maps using remotely sensed and other information. This data set consists of georeferenced digital map data and computerized attribute data. The map data are in a soil survey area extent format and include a detailed, field verified inventory of soils and miscellaneous areas that normally occur in a repeatable pattern on the landscape and that can be cartographically shown at the scale mapped. A special soil features layer (point and line features) is optional. This layer displays the location of features too small to delineate at the mapping scale, but they are large enough and contrasting enough to significantly influence use and management. The soil map units are linked to attributes in the National Soil Information System relational database, which gives the proportionate extent of the component soils and their properties. Data was downloaded Oct 2023 from U.S. Department of Agriculture, Natural Resources Conservation Service. Last Updated 2023. Use this link (https://www.nrcs.usda.gov/publications/Map%20Unit%20Description%20%28Brief%2C%20Generated%29%20Query%20by%20Soil%20Survey%20Area%20and%20Map%20Unit%20%28All%20Components%29.html) to look up the soil key descriptions (enter New York and Westchester, then find the key ID)
Color:
[168, 112, 0, 255] Background Color: N/A Outline Color: N/A Vertical Alignment: bottom Horizontal Alignment: center Right to Left: false Angle: 0 XOffset: 0 YOffset: 0 Size: 8 Font Family: Arial Font Style: normal Font Weight: normal Font Decoration: none
Description: This layer illustrates an area of Westchester County that may be particularly vulnerable to the impact of coastal storms, including: storm surge, coastal flooding and wind hazards. Hazard potential associated with rainfall flooding is not considered. The boundaries of this zone were developed by Westchester County in cooperation with local municipal officials to promote community emergency planning and preparedness.
Description: The dataset consists of aquifer polygons or regions depicting unconsolidated aquifers in New York State, excluding Long Island. Aquifers are separated by and include attributes for potential yield ranges and confinement indicator. Edition 2.0 of this data includes 38 aquifer polygons missing from edition 1.0.
The data are those in upstate NY that consist of sand and gravel and yield large supplies of water to wells. Bedrock aquifers, although significant in some areas, are not addressed here. Source data is 1:250,000, same scale as the NYS Geological Survey surficial and bedrock geology maps on which they were based. Together these maps form a consistent set of geologic and groundwater maps for use in regional management of the groundwater resources of the State. Aquifers are separated by and include attributes for potential yield ranges and confinement indicator. Edition 2.0 of this data includes 38 aquifer polygons missing from edition 1.0 The data is from 2008, which is the latest available update from the New York State GIS Clearinghouse
Service Item Id: d8a3f59d8a724b9d8a57e5a3f78fbb12
Copyright Text: New York State Department of Environmental Conservation, Division of Water, Bureau of Water Resources Management
Description: The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The file is georeferenced to earth's surface using the UTM projection and coordinate system.The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12,000.
Description: Hydric Soils derived from soils database (WCSOIL) from the 2013 Westchester County Soil Survey, U.S. Department of Agriculture, Soil Conservation Service. Data was updated September 2015 from U.S. Department of Agriculture, Natural Resources Conservation Service. https://websoilsurvey.sc.egov.usda.gov/App/HomePage.htm
Description: The National Wetlands Inventory (NWI) dataset was downloaded from the US Fish and Wildlife Service website at https://www.fws.gov/wetlands/Data/State-Downloads.html on 05/04/2021. Metadata derives from original NWI database and updated to reflect the date of download. According to website, this layer was updated last October 1st, 2020. This is a clip of all wetlands features within the Westchester County boundary minus all riverines, Long Island Sound, and the Hudson River.
This data set represents the extent, approximate location and type of wetlands and deepwater habitats in the United States and its Territories. These data delineate the areal extent of wetlands and surface waters as defined by Cowardin et al. (1979). The National Wetlands Inventory - Version 2, Surface Waters and Wetlands Inventory was derived by retaining the wetland and deepwater polygons that compose the NWI digital wetlands spatial data layer and reintroducing any linear wetland or surface water features that were orphaned from the original NWI hard copy maps by converting them to narrow polygonal features. Additionally, the data are supplemented with hydrography data, buffered to become polygonal features, as a secondary source for any single-line stream features not mapped by the NWI and to complete segmented connections. Wetland mapping conducted in WA, OR, CA, NV and ID after 2012 and most other projects mapped after 2015 were mapped to include all surface water features and are not derived data. The linear hydrography dataset used to derive Version 2 was the U.S. Geological Survey's National Hydrography Dataset (NHD). Specific information on the NHD version used to derive Version 2 and where Version 2 was mapped can be found in the 'comments' field of the Wetlands_Project_Metadata feature class. Certain wetland habitats are excluded from the National mapping program because of the limitations of aerial imagery as the primary data source used to detect wetlands. These habitats include seagrasses or submerged aquatic vegetation that are found in the intertidal and subtidal zones of estuaries and near shore coastal waters. Some deepwater reef communities (coral or tuberficid worm reefs) have also been excluded from the inventory. These habitats, because of their depth, go undetected by aerial imagery. By policy, the Service also excludes certain types of "farmed wetlands" as may be defined by the Food Security Act or that do not coincide with the Cowardin et al. definition. Contact the Service's Regional Wetland Coordinator for additional information on what types of farmed wetlands are included on wetland maps. This dataset should be used in conjunction with the Wetlands_Project_Metadata layer, which contains project specific wetlands mapping procedures and information on dates, scales and emulsion of imagery used to map the wetlands within specific project boundaries.
Description: This dataset identifies areas with steep slopes in two categories used in local planning agencies: slopes 15-25% and slopes over 25% (slope=rise/run).
Description: Dataset identifies land use categories at the tax parcel level in Westchester County, NY, and includes other boundary and ownership references for the internal use of the County. Comprised of the most recent tax parcel files available as of publication date, originally obtained from the various Towns and cities, and modified by the Westchester County Department of Planning.
Description: Compiled at a scale of 1:24,000, this data is intended for general planning purposes only, and may not be appropriate for site specific analysis. Updated (2012) to reflect basins renamed by the Westchester County Department of Planning and to align with updated Major and Minor Drainage Basins dataset "wcdrain".