#Nationalmap wfs quantum gis pro

For additional information on the NHD, go to. The National Map download client allows free downloads of public domain NHD data in either Esri File Geodatabase or Shapefile formats. The NHD is commonly combined with other data themes, such as boundaries, elevation, structures, and transportation, to produce general reference base maps.

The NHD from The National Map supports many applications, such as making maps, geocoding observations, flow modeling, data maintenance, and stewardship. The NHD is available nationwide in two seamless datasets, one based on 1:24,000 (or larger) scale and referred to as high resolution NHD, and the other based on 1:100,000 scale and referred to as medium resolution NHD. In addition to this geographic information, the dataset contains metadata that supports the exchange of future updates and improvements to the data. The network of reach codes delineating water and transported material flow allows users to trace movement in upstream and downstream directions.

The information encoded about these features includes classification and other characteristics, delineation, geographic name, position and related measures, a 'reach code' through which other information can be related to the NHD, and the direction of water flow.

#Nationalmap wfs quantum gis pro

View In: ArcGIS JavaScript ArcGIS Online Map Viewer ArcGIS Earth ArcMap ArcGIS Pro View Footprint In: ArcGIS Online Map Viewer Service Description: The USGS National Hydrography Dataset (NHD) service from The National Map is a comprehensive set of digital spatial data that encodes information about naturally occurring and constructed bodies of surface water (lakes, ponds, and reservoirs), paths through which water flows (canals, ditches, streams, and rivers), and related entities such as point features (springs, wells, stream gages, and dams).