This paper presents automated methods to prune network and polygon features of the United States high-resolution National Hydrography Dataset (NHD) to lower resolutions. Feature-pruning rules, data enrichment, and partitioning are derived from knowledge of surface water, the NHD model, and associated ...
The National Hydrography Dataset (NHD) is the surface-water component of The National Map . The NHD is a comprehensive set of digital spatial data that represents the surface water of the United States using common features such as lakes, ponds, streams, rivers, canals, streamgages, and dams...
National Hydrography Dataset (NHD)NHDPlusThe National Flood Interoperability Experiment (NFIE) is a one-year research collaboration among government, academia and industry to help demonstrate the next generation of national flood hydrology and emergency response at the National Water Center. High spatial...
HYDROGRAPHYMETRIC ASSESSMENTCOEFFICIENT OF LINE CORRESPONDENCEThis paper reports on generalization and data modeling to create reduced scale versions of the National Hydrographic Dataset (NHD) for dissemination through The National Map, the primary data delivery portal for USGS. Our approach distinguishes ...
National Hydrography Dataset URL freigeben [Geologie, Behörde (Land)] Ein vom U.S. Geological Survey zusammengestelltes Dataset, mit dem anhand der Daten von Wasserstandsanzeigern Strömungslinien-Features in einem GIS Abflusswerte zugewiesen werden. Dieses Dataset repräsentiert das ...
However, it is impractical to embed too much information because it can create a complex, inflexible, and hard to maintain geospatial dataset.Simley, JeffreyDoumbouya, ArielU.s.geological SurveySimley, Jeffrey, and Doumbouya, Ariel, 2012, National hydrography dataset--Linear referencing: U.S. ...
To meet this need, we developed a spatial framework and database using National Hydrography Dataset Plus (I-.100,000-scale); http://www.horizon-systems.com/nhdplus). This framework uses interconfluence river reaches and their local and network catchments as fundamental spatial river units and ...
Strahler stream order attributes found in the National Hydrography Dataset (NHD) and land use attributes from NHD-Plus (USGS and USEPA, 2010) and from the U.S. Census Bureau national urban boundary geographic information system (GIS) coverages were used to derive the sample frame. The process...
Multiple query features by common attributes (e.g., by time, space, and variable type) and for hydrologically related data via National Hydrography Dataset Plus (NHDPlus) upstream/downstream navigation. The objectives of this paper are to (1) introduce the WQP to water quality data users, inc...
GIS 字典 浏览字典美国国家水文数据集共享URL [地质,政府] 美国地质调查局使用水流计数据编制的数据集,用于分配水流值以简化 GIS 中的要素。 此数据集代表国家的排水网络,包括诸如河流、溪流、运河、湖泊、池塘、海岸线和水坝等要素。 另请参阅 流量 流量计 ...