USGS NED 1/3 arc-second Contours for Little Rock E, Arkansas 20180210 1 X 1 degree FileGDB 10.1

Identification Information:
Citation:
Citation Information:
Originator: U.S. Geological Survey, National Geospatial Program
Publication Date: 20180210
Title: USGS NED 1/3 arc-second Contours for Little Rock E, Arkansas 20180210 1 X 1 degree FileGDB 10.1
Geospatial Data Presentation Form: vector digital data
Publication Information:
Publication Place: Reston, VA
Publisher: U.S. Geological Survey
Online Linkage: https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Little_Rock_E_AR_1X1_GDB.zip
Larger Work Citation:
Citation Information:
Originator: U.S. Geological Survey
Publication Date: 2018
Title: National Elevation Dataset (NED) 1/3 arc-second - Contours
Online Linkage: https://www.sciencebase.gov/catalog/item/4f70ab22e4b058caae3f8deb
Description:
Abstract: These vector contour lines are derived from the 3D Elevation Program using automated and semi-automated processes. They were created to support 1:24,000-scale topographic map products, but are also published in this GIS vector format. Contour intervals are assigned by 7.5-minute quadrangle, so this vector dataset is not visually seamless across quadrangle boundaries. The vector lines have elevation attributes (in feet above mean sea level on NAVD88), but this dataset does not carry line symbols or annotation.
Purpose: This dataset represents variant packaging of USGS elevation data. The primary USGS elevation products are gridded elevation points; contours are derived from these data for standard contour maps, and these contour data are also published as GIS vectors. Contours are typically a means of representing elevations for human visualization on maps, and are never more accurate than the gridded elevation data they are derived from.
Supplemental Information: {"gdaId" : 10970363}
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 20110413
Ending Date: 20170414
Currentness Reference: publication date
Status:
Progress: Complete
Maintenance and Update Frequency: Irregular
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -92.9999999999999
East Bounding Coordinate: -91.9999999999999
North Bounding Coordinate: 35.0000000000001
South Bounding Coordinate: 34.0000000000001
Keywords:
Theme:
Theme Keyword Thesaurus: ISO 19115 Topic Category
Theme Keyword: elevation
Theme:
Theme Keyword Thesaurus: Geospatial Platform
Theme Keyword: ngda
Theme Keyword: Elevation Terrestrial
Theme Keyword: National Elevation Dataset (NED) 1/3 arc-second - Contours
Theme Keyword: 1 x 1 degree
Theme Keyword: FileGDB 10.1
Theme:
Theme Keyword Thesaurus: The National Map Type Thesaurus
Theme Keyword: Downloadable Data
Theme:
Theme Keyword Thesaurus: The National Map Theme Thesaurus
Theme Keyword: Elevation
Theme:
Theme Keyword Thesaurus: The National Map Collection Thesaurus
Theme Keyword: National Elevation Dataset (NED) 1/3 arc-second - Contours
Theme Keyword: National Elevation Dataset (NED)
Theme:
Theme Keyword Thesaurus: The National Map Product Extent Thesaurus
Theme Keyword: 1 x 1 degree
Theme:
Theme Keyword Thesaurus: The National Map Product Format Thesaurus
Theme Keyword: FileGDB 10.1
Place:
Place Keyword Thesaurus: Geographic Names Information System
Place Keyword: US
Place Keyword: United States
Place Keyword: AR
Place Keyword: Arkansas
Place Keyword: LonokeCounty
Place Keyword: GarlandCounty
Place Keyword: ClarkCounty
Place Keyword: JeffersonCounty
Place Keyword: ClevelandCounty
Place Keyword: PulaskiCounty
Place Keyword: PerryCounty
Place Keyword: FaulknerCounty
Place Keyword: GrantCounty
Place Keyword: DallasCounty
Place Keyword: SalineCounty
Place Keyword: Hot SpringCounty
Access Constraints: None
Use Constraints: None. However, users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. Acknowledgment of the U.S. Geological Survey would be appreciated for products derived from these data.
Browse Graphic:
Browse Graphic File Name: https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Little_Rock_E_AR_1X1_GDB.jpg
Browse Graphic File Description: Thumbnail JPG image
Browse Graphic File Type: JPEG
Data Quality Information:
Attribute Value Accuracy Information:
Attribute Accuracy Report: Lines of constant elevation are derived from the USGS 3D Elevation Program using automated processes. The contours are designed for visual clarity at 1:24,000 scale and a quadrangle-specific contour interval.
Logical Consistency Report: The National Elevation Dataset is seamless. Although the data accuracy varies, the data generally have high enough resolution and accuracy to support consistent and accurate contours at 1:24,000 scale.
Completeness Report: The National Elevation Dataset is national in scope, with complete coverage of the conterminous 48 states, Hawaii, the US Virgin Islands and Puerto Rico. There is partial coverage for Alaska.
Positional Accuracy:
Horizontal Positional Accuracy:
Horizontal Positional Accuracy Report: Contours do not have well-defined position, so National Map Accuracy Standards (NMAS) for horizontal accuracy do not apply. Contour positions are, on average, accurate to within one-half contour interval
Vertical Positional Accuracy:
Vertical Positional Accuracy Report: The most recently published figure of overall absolute vertical accuracy of the 3DEP within the conterminous US, expressed as the root mean square error (RMSE) of 25,310 reference points is 1.55 meters. However, the vertical accuracy actually varies significantly across the US because of differences in source quality, terrain relief, land cover, and other factors. Details of this analysis are published in "Accuracy Assessment of the U.S. Geological Survey National Elevation Dataset, and Comparison with Other Large-Area Elevation Dataset-SRTM and ASTER: U.S. Geological Survey Open-File Report 2014-1008," http://pubs.usgs.gov/of/2014/1008/.
Lineage:
Source Information:
Source Citation:
Citation Information:
Originator: U.S. Geological Survey, National Geospatial Technical Operations Center - National Elevation Dataset is a component of a comprehensive base geospatial data model.
Publication Date: 20180210
Title: Hypsography
Geospatial Data Presentation Form: Vector digital data
Other Citation Details: This contour featureclass was generated from the 1/3 arc-second version of the 3D Elevation Program. The intended viewing scale for these features is 1:24,000. The contours are derived from a filtered elevation raster to achieve smoother arcs. In some areas, the 3DEP data may be modified by the National Hydrography Dataset (NHD) flow lines and water bodies to facilitate improved integration between the hypsography and hydrography on USGS map products. These contours were generated primarily for use as a layer in GeoPDFs created in the digital mapping program. The raster data source of contours is the 3D Elevation Program 1/3 arc-second layer. Secondary datasets include the high resolution flow lines, water bodies, and areas from the National Hydrography Dataset (NHD). The NHD layers are used in hydro-enforcement of the DEM prior to contour generation. The goals of the hydro-enforcement are to prevent contour lines from extending over the surface of water bodies and to align the contour reentrants with the NHD single- line streams. The 3DEP raster cells are converted to points. Those points, along with the NHD flow lines are input into an interpolation tool to create a new surface. The NHD water bodies and areas are preprocessed to attach the minimum and maximum elevation to each polygon. From these precalculated values, an appropriate value is calculated by which to raise the elevation cells under the NHD polygons. The NHD polygons are then converted into rasters, which in turn will be used to generate a mosaic that includes the new raster surface. The mosaic is filtered to provide smoother contour lines. Contours are generated and depression and index contours are identified. There is no guarantee or warranty concerning the accuracy of the data. Users should be aware that temporal changes may have occurred since these data were collected and generated and that some parts of these data may no longer represent actual surface conditions. Hydro-enforcement and generalization can also significantly alter the spatial characteristics of the contours. Users should not use these data for critical applications without a full awareness of its limitations.
Online Linkage: http://Hs.gov/
Source Scale Denominator: 24000
Type of Source Media: digital data
Source Time Period of Content:
Time Period Information:
Range of Dates/Times:
Source Currentness Reference: publication date
Source Citation Abbreviation: Hypsography
Source Contribution: Contours
Process Step:
Process Description: Contour lines are created from USGS gridded elevation data, using automated and semi-automated processes, followed by limited visual inspection to verify quality, and occasionally editing to improve contour readability and registration with water features in the National Hydrography Dataset. Software is ArcGIS based, with some USGS customization.
Process Date: 20180210
Spatial Reference Information:
Horizontal Coordinate System Definition:
Geographic:
Latitude Resolution: 0.00001
Longitude Resolution: 0.00001
Geographic Coordinate Units: Decimal degrees
Geodetic Model:
Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: Geodetic Reference System 80
Semi-major Axis: 6378137
Denominator of Flattening Ratio: 298.2572221
Distribution Information:
Distributor:
Contact Information:
Contact Organization Primary:
Contact Organization: U.S. Geological Survey, National Geospatial Technical Operations Center
Contact Address:
Address Type: mailing and physical
Address: 1400 Independence Road
City: Rolla
State or Province: MO
Postal Code: 65401
Contact Address:
Address Type: mailing and physical
Address: Box 25046 Denver Federal Center
City: Lakewood
State or Province: CO
Postal Code: 80225
Contact Voice Telephone: 1-888-ASK-USGS (1-888-275-8747)
Contact Electronic Mail Address: http://www.usgs.gov/ask/
Hours: Monday through Friday 8:00 AM to 4:00 PM
Contact Instructions: Metadata information can also be obtained through online services using The National Map Viewer, at http://nationalmap.usgs.gov or EarthExplorer, at http://earthexplorer.usgs.gov or Ask USGS at http://www.usgs.gov/ask.
Resource Description: Downloadable Data
Distribution Liability: No liability for content or accuracy is presumed by USGS for data.
Standard Order Process:
Digital Form:
Digital Transfer Information:
Format Name: FileGDB
Format Version Number: 10.1
Format Information Content: Spatial objects with unique identifiers and coordinate data.
File Decompression Technique: No compression applied
Transfer Size: 62.06482
Digital Transfer Option:
Online Option:
Computer Contact Information:
Network Address:
Network Resource Name: https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Little_Rock_E_AR_1X1_GDB.zip
Fees: None
Metadata Reference Information:
Metadata Date: 20180212
Metadata Review Date: 20180210
Metadata Future Review Date: 20190210
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: U.S. Geological Survey, National Geospatial Technical Operations Center
Contact Address:
Address Type: mailing and physical
Address: 1400 Independence Road
City: Rolla
State or Province: MO
Postal Code: 65401
Contact Address:
Address Type: mailing and physical
Address: Box 25046 Denver Federal Center
City: Lakewood
State or Province: CO
Postal Code: 80225
Contact Voice Telephone: 1-888-ASK-USGS (1-888-275-8747)
Contact Electronic Mail Address: http://www.usgs.gov/ask/
Hours: Monday through Friday 8:00 AM to 4:00 PM
Contact Instructions: Metadata information can also be obtained through online services using The National Map Viewer, at http://nationalmap.usgs.gov or EarthExplorer, at http://earthexplorer.usgs.gov or Ask USGS at http://www.usgs.gov/ask.
Metadata Standard Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998