20240529
10420800
20240529
FALSE
10420800
20100603
10382500
Published
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NHD_MEDIUM_RES_AREA_USGS
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002
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NAD_1983_UTM_Zone_15N
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Arkansas Geographic Information Systems Office
State of Arkansas
501-682-2676
501-682-6077
1 Capitol Mall Suite 6D
Little Rock
AR
72201
communication@arkansasgisoffice.org
20170112
ArcGIS Metadata
1.0
Arkansas GIS Office
State of Arkansas
501-682-2929
1 Capitol Mall, Suite 6D
Little Rock
AR
72212
US
communication@arkansasgisoffice.org
http://gis.arkansas.gov/product/medium-resolution-national-hydrography-dataset-landmark-feature-polygon/
https://gis.arkansas.gov/arcgis/rest/services/FEATURESERVICES/Water/FeatureServer/30
Feature Class
asdi.water.NHD_MEDIUM_RES_AREA_USGS
vector digital data
This data set contains regions representing areal NHD hydrographic landmark features. The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the sream segments or reaches that comprise the nation's surface water drainage system. Medium resolution NHD is based on the content of the U.S. Geological Survey 1:100,000-scale Digital Line Graph (DLG) hydrography data, integrated with reach-related information from the U.S. Environmental Protection Agency Reach File Version 3.0 (RF3). More specifically, it contains reach codes for networked features and isolated lakes, flow direction, names, stream level, and centerline representations for areal water bodies. Reaches are also defined to represent water bodies 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 National Hydrography Dataset combines elements of the DLG and RF3: spatial accuracy and comprehensiveness from the DLG and network relationships, names, and a unique identifier (reach code) for surface water features from RF3. The NHD supersedes DLG and RF3 by incorporating them, not by replacing them. Users of DLG and RF3 will find the National Hydrography Dataset both familiar and greatly expanded and refined. The NHD provides a national framework for assigning reach addresses to water-related entities such as industrial dischargers, 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 in a manner similar to street addresses. 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 better understand and display their respective effects upon one another. Furthermore, because the NHD provides a nationally consistent framework for addresses 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. The National Hydrography Dataset is designed to provide comprehensive coverage of hydrologic data for the US. While initially based on 1:100,000-scale data, the NHD is designed to incorporate and encourage the development of higher-resolution data required by many users. It will facilitate the improved integration of water-related data in support of the application requirements of a growing national user community and will enable shared maintenance and enhancement.
See dataset specific metadata.
Arkansas Geographic Information Systems Office
State of Arkansas
501-682-2676
501-682-6077
1 Capitol Mall Suite 6D
Little Rock
AR
72201
communication@arkansasgisoffice.org
Reservoir
inlandWaters
water
Spring / Seep
Reach Code
Swamp / Marsh
Lake / Pond
Hydrography
Canal / Ditch
NHD
Stream / River
FWHYDROGRAPHY
Artificial Path
Reservoir
inlandWaters
water
Spring / Seep
Reach Code
Swamp / Marsh
Lake / Pond
Hydrography
Canal / Ditch
NHD
Stream / River
FWHYDROGRAPHY
Artificial Path
See access and use constraints information.
None. Acknowledgment of the originating agencies would be appreciated in products derived from these data.
Esri ArcGIS 10.3.0.4322
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30.941451
37.922929
0.000000
0.000000
1
-96.328197
-88.997954
37.922929
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asdi.water.NHD_MEDIUM_RES_AREA_USGS
Feature Class
0
FCODE
Feature type and combinations of characteristic values
U.S. Geological Survey
FCode
Integer
4
10
0
ELEVATION
Elevation of water surfaces where water pools is encoded for a few features
U.S. Geological Survey
ELEVATION
Double
8
38
8
FTYPE
Three digit, unique identifier of a feature type
U.S. Geological Survey
FType
Integer
4
10
0
AREASQKM
Area of areal features, Albers Equal Area
U.S. Geological Survey
AREASQKM
Double
8
38
8
FDATE
Date of last feature modification
U.S. Geological Survey
FDATE
Date
8
0
0
SE_ANNO_CAD_DATA
SE_ANNO_CAD_DATA
Blob
0
0
0
FTYPE_DESC
Feature sub-type description
U.S. Geological Survey
FTYPE_DESC
String
50
0
0
OBJECTID
Internal feature number.
ESRI
Sequential unique whole numbers that are automatically generated.
OBJECTID
OID
4
10
0
GNIS_NAME
Proper name, specific term, or expression by which a particular geographic entity is known
U.S. Geological Survey
GNIS_NAME
String
65
0
0
COMID
Uniquely identifies the occurance of each feature
U.S. Geological Survey
ComID
Integer
4
10
0
SHAPE
Feature geometry.
ESRI
Coordinates defining the features.
SHAPE
Geometry
4
0
0
GNIS_ID
Unique identifier assined by GNIS begining in 1996
U.S. Geological Survey
GNIS_ID
String
10
0
0
FCODE_DESC
Detailed description of the features characteristics
U.S. Geological Survey
FCODE_DESC
String
100
0
0
st_area(shape)
st_area(shape)
Double
0
0
0
st_length(shape)
st_length(shape)
Double
0
0
0
dataset
EPSG
6.11(3.0.1)
Simple
FALSE
0
TRUE
FALSE