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DEM (30m), Wisconsin 1998

Identification Information

Citation
Title
DEM (30m), Wisconsin 1998
Publisher
Wisconsin Department of Natural Resources
Place of Publication
Madison , WI , US
Publication Date
1998-01-01
Geospatial Data Presentation Form
mapDigital
Collection Title
Statewide
Other Citation Details
The majority of the 1-Degree DEMs were originally produced by the US Defense Mapping Agency. Refer to the USGS for details: http://mac.usgs.gov/mac/isb/pubs/factsheets/fs04000.html#dem
Abstract
This Grid-format Digital Elevation Model (DEM) is a raster representation of land elevation of Wisconsin. This DEM ("demgw930") is derived from the 7.5-minute DEMs published by the US Geological Survey (USGS). This DEM is an integer grid, with elevation units in meters relative to the National Geodetic Vertical Datum of 1929 (NGVD 29). The 7.5-minute DEMs have a 30-meter pixel cell size, or resolution. More current or detailed DEMs may also be available directly from the USGS. For more information, refer to the USGS DEM Fact Sheet:
Purpose
These data provide a highly generalized, statewide representation of land surface elevation for mapping purposes. The data are not intended for landscape scale analysis.
Supplemental Information
The spatial extent this data layer is the state of Wisconsin, plus a buffer around the perimeter extending approximately 5,000 meters beyond the state boundary. The DEM includes elevation values every 30 meters or 98.4 feet. Elevation units are in meters. ArcView with the Spatial Analyst Extension, ArcInfo/ArcGIS Grid, or comparable GIS software is needed to use the Grid format data meaningfully. Time period extent for this content is 1990-2000.
Temporal Extent
Currentness Reference
publication date
Time Instant
1998-12-31T00:00:00
Bounding Box
West
-93.032613
East
-86.597506
North
47.128225
South
42.410356
ISO Topic Category
elevation
environment
Place Keyword
Wisconsin
Place Keyword Thesaurus
GNIS
Theme Keyword
Raster
Theme Keyword Thesaurus
FGDC
Theme Keyword
Digital elevation models
Theme Keyword Thesaurus
LCSH
Theme Keyword
DEM
elevation
hypsography
environment
Theme Keyword Thesaurus
Legal Constraints
Use Limitation
Refer to: http://www.dnr.state.wi.us/org/legal/WebSiteLegalInformation.html
Status
completed
Maintenance and Update Frequency
notPlanned
Language
eng
Credit
Wisconsin Department of Natural Resources and United States Geological Survey (USGS)
Point of Contact
Contact
Wisconsin DNR
Position Name
GIS Data Specialist
Delivery Point
P.O. Box 7921
City
Madison
Administrative Area
WI
Postal Code
53707-7921
Country
US
Email
John.Laedlein@dnr.state.wi.us
Phone
(608) 264-8916

Spatial Reference Information

Reference System Identifier
Code
3071
Code Space
EPSG
Version

Data Quality Information

Absolute External Positional Accuracy
Absolute External Positional Accuracy
Lineage
Process Step
Description
The DNR Geographic Services Section received the initial data in ArcInfo Grid format, projected to UTM zones (NAD27 or NAD83). DNR staff reprojected the data to WTM83/91 and combined them into a statewide grid.
Process Date
1990-01-01T00:00:00
Process Step
Description
A mix of Level 2 and Level 1 DEMs were obtained from the USGS over a number of years as 1:24K quad or quarter-quad tiles. Filtered Level 1 30-meter DEM tiles obtained from the USGS in January of 2000 were the result of processing that the USGS carried out to improve display characteristics. Additional information about this filtering is believed to be available on the USGS DEM website. The resulting DEM is a "composite" 30-meter DEM including Level 2 coverage where it exists, and Level 1 elsewhere.
Process Date
1998-20-00T00:00:00
Source
Title
7.5-minute Digital Elevation Model (30- x 30-m data spacing, cast on Universal Transverse Mercator (UTM) projection)
Originator
United States Geological Survey
Publisher
United States Geological Survey
Description
Includes land surface elevation information.

Distribution Information

Format Name
Raster Dataset
Distributor
UW-Madison
Distributor
Wisconsin Department of Natural Resources
Online Access
https://gisdata.wisc.edu/public/WI_DEM30m_1998.zip
Protocol
WWW:DOWNLOAD-1.0-http--download
Name
GeoData@Wisconsin
Function
download

Content Information

Content Type
physicalMeasurement

Spatial Representation Information

Raster
Number of Dimensions
2
Column Count
16282
Row Count
17310
Cell Geometry Type
area
Corner Points
Point
289830.682345 220113.456002
Point
289830.682345 739413.456002
Point
778290.682345 739413.456002
Point
778290.682345 220113.456002
Center Point
534060.682345 479763.456002

Metadata Reference Information

Hierarchy Level
dataset
Metadata File Identifier
400C0E52-0050-414B-A951-D899FFFB3BCB
Metadata Date Stamp
2019-07-02
Metadata Standard Name
ISO 19139 Geographic Information - Metadata - Implementation Specification
Metadata Standard Version
2007
Character Set
utf8
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