Skip to main content
USGS - science for a changing world

USGS National Hydrography Dataset (NHD) Best Resolution for Alabama 20160411 State or Territory FileGDB 10.1 - Flowlines

Dates

Publication Date
Start Date
1901-01-01
End Date
2919-10-05

Citation

U.S. Geological Survey, National Geospatial Program, 20160411, USGS National Hydrography Dataset (NHD) Best Resolution for Alabama 20160411 State or Territory FileGDB 10.1: U.S. Geological Survey.

Summary

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 [...]

Contacts

Attached Files

Click on title to download individual files attached to this item.

NHD_H_01_GDB.xml
Original FGDC Metadata

View
31.41 KB
Extension: AL_NHD.zip
AL_NHD.sd
“AL_NHD”
156.89 MB
thumbnail.png thumbnail 19.16 KB

Purpose

The NHD is a national framework for assigning reach addresses to water-related entities, such as industrial discharges, drinking water supplies, fish habitat areas, wild and scenic rivers. Reach addresses establish the locations of these entities relative to one another within the NHD surface water drainage network, much like addresses on streets. Once linked to the NHD by their reach addresses, the upstream/downstream relationships of these water-related entities--and any associated information about them--can be analyzed using software tools ranging from spreadsheets to geographic information systems (GIS). GIS can also be used to combine NHD-based network analysis with other data layers, such as soils, land use and population, to help understand and display their respective effects upon one another. Furthermore, because the NHD provides a nationally consistent framework for addressing and analysis, water-related information linked to reach addresses by one organization (national, state, local) can be shared with other organizations and easily integrated into many different types of applications to the benefit of all.

Rights

USGS
Thumbnail JPG image
Thumbnail JPG image

Map

Spatial Services

ArcGIS Mapping Service

WMS Service

Tags

Categories
Theme
Place
Types

Provenance

Data source
Input directly
USGS

Additional Information

ArcGIS Service Definition Extension

filePathUsed__disk__b9/3b/f1/b93bf1065da3b176eaf3c8375ff8b819bf09e526
boundingBox
minY29.9274618868799
minX-89.6284759713187
maxY35.7336292112009
maxX-84.419746912737
processingStatesuccess
servicePath578938e7e4b0c1aacab776f0
nameAL_NHD.sd
files
nameAL_NHD.sd
titleAL_NHD
contentTypex-gis/x-arcgis-service-def
pathOnDisk__disk__b9/3b/f1/b93bf1065da3b176eaf3c8375ff8b819bf09e526
size164515058
dateUploadedFri Jul 15 13:25:57 MDT 2016
originalMetadatatrue
namethumbnail.png
contentTypeimage/png
pathOnDisk__disk__80/c6/fa/80c6fa95dd576091b666bcc1391b3860f36fbedc
imageWidth200
imageHeight133
size19622
dateUploadedFri Jul 15 13:26:31 MDT 2016
enabledServices
WMSServer
serviceId578938e7e4b0c1aacab776f0

Item Actions

View Item as ...

Save Item as ...

View Item...