View Metadata
DEM (NED 10m) Wisconsin 2009
- Identification Information
- Spatial Reference Information
- Data Quality Information
- Distribution Information
- Content Information
- Spatial Representation Information
- Metadata Reference Information
Identification Information
- Citation
- Title
- DEM (NED 10m) Wisconsin 2009
- Originator
- Wisconsin Department of Natural Resources
- Publication Date
- 2009-01-01
- Geospatial Data Presentation Form
- mapDigital
- Collection Title
- Statewide
- Abstract
- This Elevation Grid is a raster representation of land elevation of Wisconsin, derived from the US Geological Survey's 10-meter National Elevation Dataset (NED). The NED is a seamless mosaic of best-available elevation data. In addition to the availability of complete 7.5-minute data, USGS developed processing methods to filter production artifacts in the existing data, convert to the NAD83 datum, edge-match, and fill slivers of missing data at quadrangle seams. One of the effects of the NED processing steps is a much-improved base of elevation data for calculating slope and hydrologic derivatives. The specifications for the NED 1 arc second (30 meter) and 1/3 arc second (10 meter) data are: Geographic coordinate system Horizontal datum of NAD83, except for AK which is NAD27; Vertical datum of NAVD88, except for AK which is NAVD29 Z units of meters
- Purpose
- Geospatial elevation data are utilized by the scientific and resource management communities for global change research, hydrologic modeling, resource monitoring, mapping, and visualization applications.
- Supplemental Information
- WDNR obtained these USGS-produced NED 10-meter resolution data from MapMart, a division of Intrasearch, Inc., in July 2009. No spatial metadata from USGS was provided, so the data source, processing method, and resolution at the time MapMart obtained the data from USGS are not available. USGS continues to improve the NED 10m product, and provides shapefiles of spatial metadata when downloading the data. The NED data were mosaicked to cover Wisconsin, projected to WTM83(91), and clipped using a 5000 meter buffer of the state perimeter. Separate data sets of hillshading, percent slope, and slope aspect were derived. Additional terrain derivatives for hydrologic modelling or cartographic purposes may be produced in the future. After USGS completes the updates of the NED 10m product, it may be advisable to replace all of these layers. For information about the source USGS NED, see "The National Map - Elevation, Fact Sheet 2009-3053": http://pubs.usgs.gov/fs/2009/3053/ .
- Temporal Extent
- Currentness Reference
- publication date
- Time Instant
- Bounding Box
- West
- -93.169529
- East
- -86.460623
- North
- 47.21817
- South
- 42.317026
- ISO Topic Category
- elevation
- Place Keyword
-
Wisconsin
- Place Keyword Thesaurus
- GeoNames
- Theme Keyword
-
Raster
- Theme Keyword Thesaurus
- FGDC
- Theme Keyword
- Land Surface
- Topography
- Landforms
- Terrain
- Elevation
- DEM
- Digital Elevation Model
-
hypsography
- Theme Keyword Thesaurus
- Resource Constraints
- Use Limitation
- None. Acknowlegement of the originating agencies (USGS, WDNR) would be appreciated in products derived from these data.
- Legal Constraints
- Use Limitation
- Although this data is being distributed by the University of Wisconsin-Madison, no warranty expressed or implied is made by the University as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the University in the use of this data, or related materials.
- Status
- underDevelopment
- Maintenance and Update Frequency
- unknown
- Language
- eng
- Credit
- Wisconsin Department of Natural Resources U.S. Geological Survey
- Point of Contact
- Contact
- Wisconsin Department of Natural Resources
- Delivery Point
- 101 S. Webster St.
- City
- Madison
- Administrative Area
- WI
- Postal Code
- 53707
- Country
- US
- DNRGEOData@wisconsin.gov
- Phone
- (608) 264-8914
Spatial Reference Information
- Reference System Identifier
- Code
- 3071
- Code Space
- EPSG
- Version
Data Quality Information
- Absolute External Positional Accuracy
- Lineage
- Process Step
- Description
- see: http://ned.usgs.gov/Ned/methodology.asp "Processing Procedures: Development of the NED required the merging of over 50,000 different DEM data files. A processing system was designed to assemble a seamless dataset from multiple data sources, resolutions, and production methods. Procedures were developed to maintain the database with periodic updates and to insure the integration of higher resolution elevation data as they become available. A raster data model referenced to a geographic grid was used for NED. The data model is logically seamless but uses an internal tile structure initially selected as a 1- by 1-degree area. The NED dataset currently achieves complete national coverage by integrating the "best" available data in the USGS Sales Database database. Even with the "best" available, there could be a wide range of source dates and some artifacts in the source DEM. The NED assemble process identifies all existing DEM's available from data producers. The system filters production artifacts, and performs any necessary datum conversions and coordinate transformations. The NED data is only as good as the orginal source DEM. Individual DEM files are appended together into the larger tile structure specified for the database. Edge matching and metadata generation are applied lastly in assembling each NED tile. The specific procedures adopted and the issues addressed in building the NED are discussed in the following steps: Identification of Existing DEM's Datum and Elevation Conversions Projection Transformation and Resampling Artifact Corrections Merge of Multiple Data Sources Edge Matching" "Specifications: Technical Specifications Operational Specifications Business Specifications" WDNR mosaiced, projected, and clipped the data. A variety of .LYR files are available for rendering.
Distribution Information
- Format Name
- Raster Dataset
- Distributor
- University of Wisconsin-Madison
- Distributor
- Wisconsin Department of Natural Resources
- Online Access
- https://gisdata.wisc.edu/public/WI_NED10m_2009.zip
- Protocol
- WWW:DOWNLOAD-1.0-http--download
- Name
- GeoData@Wisconsin
- Function
- download
Content Information
- Content Type
- image
Spatial Representation Information
- Raster
- Number of Dimensions
- 2
- Column Count
- 50842
- Row Count
- 53930
- Cell Geometry Type
- area
- Corner Points
- Point
- 279828.679000 210109.009000
- Point
- 279828.679000 749409.009000
- Point
- 788248.679000 749409.009000
- Point
- 788248.679000 210109.009000
- Center Point
- 534038.679000 479759.009000
Metadata Reference Information
- Hierarchy Level
- dataset
- Metadata File Identifier
- 9943838A-3040-4030-BEBC-E7FD9CDCD1B4
- Metadata Date Stamp
- 2019-06-24
- Metadata Standard Name
- ISO 19139 Geographic Information - Metadata - Implementation Specification
- Metadata Standard Version
- 2007
- Character Set
- utf8