Service Description: The Water24k_Poly feature class of the North Dakota State GIS Hub is a polygon layer of hydrographic features intended primarily for cartographic representations of water features in North Dakota. The original data were derived from the National Hydrographic Dataset and were modified to make it easier for making maps and displaying the data through the use of standard fields that have been developed by the NDSWC over the last 20 years. Lakes have been merged, for example, in areas where roads split them but are connected under the roadbed. Rather than being stuck with the cryptic codes found in the NHD shapefiles, these codes were represented through additional fields with simple descriptions of features making it easier to develop a map or graphic representation. Closure lines have been included to partition out bays. This layer is intended to be draw without boundaries, relying on the shorelines and boundaries provided in the _Line layer. In this way, the bays, for example, will be shown as a continuous polygonal area without a line across the mouth of the bay. This dataset is in no way intended for hydrologic analysis, only cartographic display and representation.
Service ItemId: cbc0f2d8a1cd4ac5bea7cfd21eb9be32
Has Versioned Data: false
Max Record Count: 2000
Supported query Formats: JSON
Supports applyEdits with GlobalIds: False
Supports Shared Templates: True
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Description: This cartographic representation was derived from the National Hydrography Dataset (NHD) due to the NHD being the primary, federally recognized hydrographic layer for the United States. The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water bodies. Reaches are also defined on waterbodies and the approximate shorelines of the Great Lakes, the Atlantic and Pacific Oceans and the Gulf of Mexico. The NHD also incorporates the National Spatial Data Infrastructure framework criteria established by the Federal Geographic Data Committee.
The North Dakota State Water Commission compiled this version of hydrographic linework in order to simplify and speed the simple display of water features in North Dakota. The NHD is designed primarily for GIS analysis and therefore becomes cumbersome for simple symbolization and display. US Geological Survey - original linework development of the National Hydrography Dataset (NHD) with stewardship of the NHD for North Dakota being maintained by the ND State Water Commission and the ND Dept of Environmental Quality.
Questions about this layer should be directed to:
Rod Bassler
GIS Coordinator/Cartographer
North Dakota State Water Commission
rbassler@nd.gov - 701-328-4998
Spatial Reference: 102100 (3857)
Initial Extent:
XMin: -11623348.7026525
YMin: 5647333.002681
XMax: -10716590.4675934
YMax: 6394306.58347189
Spatial Reference: 102100 (3857)
Full Extent:
XMin: -11786990.357951
YMin: 5521888.00286578
XMax: -10580954.6394953
YMax: 6468807.5498397
Spatial Reference: 102100 (3857)
Units: esriMeters
Child Resources:
Info
SharedTemplates
Supported Operations:
Query
ConvertFormat
Get Estimates
Create Replica