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GIS.NY.GOV

NYS ITS GIS Program Office

Geographic Information Systems Clearinghouse

US Geological Survey (USGS) - National Geospatial Program

10 Data Sets
  Data Set Name Description
1. US Topo
   Data Set Details
The US Topo is the next generation of USGS topographic maps in the familiar 7.5 minute quadrangle format. Each georeferenced digital map quadrangle is constructed in GeoPDF format with geographic data layers from the National Map. An imagery layer is included and layers can be turned on and off. 
2. Historical Topographic Map Collection
   Data Set Details
The goal of The National Maps Historical Topographic Map Collection (HTMC), which started in 2011, is to provide a digital repository for all of the USGS 1:250,000 scale and larger maps printed between 1884, the inception of the topographic mapping program, and 2006. Currently, there are more than 178,000 high-resolution, georeferenced digital map files and accompanying metadata in the HTMC.  
3. The National Map
   Data Set Details
The National Map (TNM) includes a variety of products and services that provide the Nation with access to base geospatial information to describe the landscape of the United States and its territories. The National Map supports data download, downloadable digital versions of US Topo the Historical Topographic Map Collection, and map services. The geographic data available from The National Map includes boundaries, elevation, geographic names, hydrography, land cover, orthoimagery, structures, and transportation that are seamless, nationally consistent, and continuously maintained. 
4. The National Map Services
   Data Set Details
The National Map (TNM) provides 53 service endpoints that include both cached and dynamic basemaps, theme overlays, availability index overlays as well as WFC and WCF services. 
5. Elevation Products
   Data Set Details
The National Elevation Dataset (NED) is the primary data product produced and distributed by the USGS. The NED provides seamless raster elevation data of the conterminous United States, Alaska, Hawaii, and the island territories. The NED is derived from diverse source data sets that are processed to a specification with a consistent resolution, coordinate system, elevation units, and horizontal and vertical datums. The 3D Elevation Program (3DEP) initiative is being developed to respond to growing needs for high-quality topographic data and for a wide range of other three-dimensional representations of the Nation's natural and constructed features. The primary goal of 3DEP is to systematically collect enhanced elevation data in the form of high-quality light detection and ranging (lidar) data. 
6. Historical Land Use and Land Cover (LULC)
   Data Set Details
The historical Land Use and Land Cover (LULC) data consists of land use and land cover classification data that was based primarily on the manual interpretation of 1970's and 1980's National High-Altitude Photography (NHAP), usually at scales smaller than 1:60,000. Secondary sources included land use maps and surveys. The 1:250,000-scale topographic map series is generally used as the base map for the compilation of the LULC maps. The spatial resolution for all LULC files will depend on the format and feature type. Files are in the Geographic Information Retrieval and Analysis System (GIRAS) format and will have a minimum polygon area of 10 acres (4 hectares) with a minimum width of 660 feet (200 meters) for manmade features. Non-urban or natural features have a minimum polygon area of 40 acres (16 hectares) with a minimum width of 1320 feet (400 meters). Files in CTG format will have a resolution of 30 meters. 
7. National Hydrography Dataset
   Data Set Details
The National Hydrography Dataset (NHD) is used to portray surface water on The National Map. The NHD represents the drainage network with features such as rivers, streams, canals, lakes, ponds, coastline, dams, and streamgages. These data are designed to be used in general mapping and in the analysis of surface water systems. The NHD contains a flow network that allows for tracing water downstream or upstream. The NHD uses an addressing system based on reach codes and linear referencing to link specific information about the water such as water discharge rates, water quality, and fish population.  
8. National Hydrography Dataset Plus (NHDPlus)
   Data Set Details
The National Hydrography Dataset Plus (NHDPlus) is a geo-spatial, hydrologic framework dataset built by the US EPA Office of Water, assisted by the US Geological Survey. NHDPlus is an integrated suite of application-ready geospatial data sets that incorporate many of the best features of the National Hydrography Dataset (NHD), the National Elevation Dataset (NED), the National Land Cover Dataset (NLDC), and the Watershed Boundary Dataset (WBD). 
9. National Land Cover Database (NLCD)
   Data Set Details
The National Land Cover Database (NLCD) serves as the definitive Landsat-based, 30-meter resolution, land cover database for the Nation. NLCD provides spatial reference and descriptive data for characteristics of the land surface such as thematic class (for example, urban, agriculture, and forest), percent impervious surface, and percent tree canopy cover. NLCD products are created by the Multi-Resolution Land Characteristics (MRLC) Consortium, a partnership of Federal agencies led by the U.S. Geological Survey who coordinate and generate consistent and relevant land cover information at the national scale for a wide variety of environmental, land management, and modeling applications.  
10. Watershed Boundary Dataset (WBD)
   Data Set Details
The Watershed Boundary Dataset (WBD) provides a hydrologically correct, seamless and consistent national GIS database at a scale of 1:24,000, At a minimum, the WBD is being delineated and georeferenced to the USGS 1:24,000 scale topographic base map meeting National Map Accuracy Standards (NMAS). The WBD defines the areal extent of surface water drainage to a point, accounting for all land and surface areas. Watershed boundaries are determined solely upon science-based hydrologic principles, not favoring any administrative boundaries or special projects, nor particular program or agency. Defined Hydrologic units (HU) are given a Hydrologic Unit Code (HUC). A HUC describes where the unit is in the country and the level of the unit. The WBD exists in six levels of a nested hierarchy permitting the analysis to determine which drainage basin a particular location is enclosed in.