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GAP Land Cover - Image

This page last updated: 2006-08-09 09:15:57.0
Metadata created using Minnesota Geographic Metadata Guidelines


Metadata Summary

Originator Minnesota DNR - Division of Forestry
Abstract This raster dataset is a simple image of the original detailed (1-acre minimum), hierarchically organized vegetation cover map produced by computer classification of combined two-season pairs of early-1990s Landsat 4/5 Thematic Mapper (TM) satellite imagery, as part of the Upper Midwest Gap Analysis Program (UMGAP) of the U.S. Geological Survey.  Units of analysis were Minnesota Ecological Classification System (ECS) subsections subdivided by TM scenes.  GAP typology and classification protocols are closely comparable across Minnesota, Wisconsin and Michigan.
Use Tips Note that the pixel values in this image do NOT correspond with the actual cell values of the GAP raster dataset. This layer is for display purposes only and cannot be used for GIS Analysis.
Browse Graphic View a sample of the data.
Time Period of Content Date 1991-1993
Currentness Reference Analysis and accuracy assessment took place during 1995-2000. Landsat scene dates are shown in red on this linked image: Scene Summary Map
Access Constraints None
Use Constraints Data are unrestricted.
Distributor Organization DNR-MIS
Ordering Instructions See Online Linkage or Distribution Contact
Online Linkage http://deli.dnr.state.mn.us/


Full Metadata
GAP Land Cover - Image

Go to Section:
1. Identification Information
2. Data Quality Information
3. Spatial Data Organization Information
4. Spatial Reference Information
5. Entity and Attribute Information
6. Distribution Information
7. Metadata Reference Information

 
Section 1 Identification Information   Top of page
Originator Minnesota DNR - Division of Forestry
Title GAP Land Cover - Image
Abstract This raster dataset is a simple image of the original detailed (1-acre minimum), hierarchically organized vegetation cover map produced by computer classification of combined two-season pairs of early-1990s Landsat 4/5 Thematic Mapper (TM) satellite imagery, as part of the Upper Midwest Gap Analysis Program (UMGAP) of the U.S. Geological Survey.  Units of analysis were Minnesota Ecological Classification System (ECS) subsections subdivided by TM scenes.  GAP typology and classification protocols are closely comparable across Minnesota, Wisconsin and Michigan.
Use Tips Note that the pixel values in this image do NOT correspond with the actual cell values of the GAP raster dataset. This layer is for display purposes only and cannot be used for GIS Analysis.
Purpose The image theme should be useful where a view of the GAP landcover data is necessary, but access to the associated attributes is not required. The image shown depicts the Level 4 (most detailed) classification of the dataset using a legend provided by DNR Forestry Resource Assessment.
Time Period of Content Date 1991-1993
Currentness Reference Analysis and accuracy assessment took place during 1995-2000. Landsat scene dates are shown in red on this linked image: Scene Summary Map
Progress Complete
Maintenance and Update Frequency As Needed
Spatial Extent of Data Statewide. Processed by units as shown at the following link:  GAP Processing Unit Map
Bounding Coordinates -97.5
-89
49.5
43
Place Keywords Minnesota
Theme Keywords Land Use, Land Cover, Forest, Vegetation, GAP, ECS Provinces, Sections, Subsections, biota
Theme Keyword Thesaurus None
Access Constraints None
Use Constraints Data are unrestricted.
Contact Person Information Bill Befort, Remote Sensing Coordinator
DNR-Forestry, Resource Assessment
413 SE 13th Street
Grand Rapids, MN 55744
Phone: (218) 327-4449 x223
FAX: 218-327-4259
E-mail:
Browse Graphic View a sample of the data.
Browse Graphic File Description
Associated Data Sets

 
Section 2 Data Quality Information Top of full metadata Top of page
Attribute Accuracy Source table LULC_GAP1AIM3.TIF: Minnesota GAP vegetation information is presented at four levels, from the most detailed (Level 4) to the most highly aggregated (Level 1).  In each processing unit, accuracy figures have been calculated for every type at each level of the classification hierarchy.  Percentage accuracy attributes at all four levels are attached to every data element, as indicated in the Attribute Table.  (Types too sparsely represented for accuracy assessment have an accuracy attribute of -1.)  Class definitions and accuracy tabulations can be found, along with an explanation of accuracy assessment methods, at the following link: Minnesota GAP Accuracy Assessment.
Logical Consistency Not Applicable
Completeness The existing vegetation of the entire state, with emphasis on forests, has been mapped to a single standard by use of closely comparable satellite image sets and a consistent classification protocol.  The product closely resembles GAP vegetation coverages in Wisconsin and Michigan.
Horizontal Positional Accuracy Source layer gap1ara3: All imagery was precision-corrected to digital elevation models of Minnesota by the U.S. Geological Survey's EROS Data Center, Sioux Falls SD, and was analyzed in conjunction with National Wetlands Inventory and MNDoT Roads datasets. Estimated positional accuracy of the data is plus or minus 1  Landsat TM picture element, or 30 meters.
Vertical Positional Accuracy Source layer gap1ara3: Not Applicable
Lineage Attribute Lineage for source table LULC_GAP1AIM3.TIF: Early discussion between the U.S. Fish and Wildlife Service and cooperators in a projected Gap Analysis Program covering Minnesota, Wisconsin and Michigan assumed that the desired vegetation layer would be produced by computer analysis of seven-band, 30-meter Landsat Thematic Mapper (TM) satellite images at a minimum mapping acreage of 100 ha (250 ac), and that the classification would be correspondingly coarse--at about the second level of the U.S. Geological Survey land use/cover class system (Anderson et al. 1976).  When the Wisconsin Department of Natural Resources put forward its WISCLAND classification as an alternative, it was also considered a "Level II" scheme. WISCLAND sought to map land cover across Wisconsin at the 5-acre (2 ha) level of detail by multiseason TM image analysis together with wetlands,  topographic and roads data (Lillesand 1993).  Later it became clear that a more detailed physiognomic and floristic typology was wanted for GAP (Jennings1993)--at the "community type" level of the UNESCO vegetation class system (Driscoll et al.1984).  State remote sensing specialists responded by expanding the WISCLAND scheme to the highest level of vegetational detail they considered mappable from two well-timed scene dates together with ancillary data.  The result was the typology used in Minnesota GAP.

Anderson, J.R., E.E. Hardy, J.R. Roach and R.E. Witmer. 1976. A land use and land cover classification system for use with remote sensor data. U.S. Geol. Survey Prof. Paper 964. 28p.

Driscoll, R.S., D.L. Merkel, D.L. Radloff, D.E. Snyder and J. S. Hagihara. 1984. An ecological land classification framework for the United States. USDA For. Serv. Misc. Pub. 1439, Washington DC. 56p.

Jennings, M.D. 1993. Natural terrestrial cover classification: assumptions and definitions. US Fish & Wildlife Service Idaho Coop. Res. Unit, U. of Idaho, Moscow. 28p.

Lillesand, T.M. 1993. Suggested strategies for satellite-assisted statewide land cover mapping in Wisconsin.  Pres. pap., Am. Soc. for Photogramm. & Rem. Sens. Annual Meeting, New Orleans. 11p. 

Source Scale Denominator
 
Section 3 Spatial Data Organization Information Top of full metadata Top of page
Native Data Set Environment ERDAS Imagine 8.3
Geographic Reference for Tabular Data Not Applicable
Spatial Object Type raster
Vendor Specific Object Types grid
Tiling Scheme state
 
Section 4 Spatial Reference Information Top of full metadata Top of page
Horizontal Coordinate Scheme UTM
Ellipsoid GRS1980
Horizontal Datum NAD83
Horizontal Units meters
Distance Resolution Source layer gap1ara3: All imagery was precision-corrected to digital elevation models of Minnesota by the U.S. Geological Survey's EROS Data Center, Sioux Falls SD, and was analyzed in conjunction with National Wetlands Inventory and MNDoT Roads datasets. Estimated positional accuracy of the data is plus or minus 1  Landsat TM picture element, or 30 meters.
Altitude Datum Not Applicable
Altitude Units Not Applicable
Depth Datum Not Applicable
Depth Units Not Applicable
Cell Width 30
Cell Height 30
Latitude Resolution
Longitude Resolution
UTM Zone Number 15
SPCS Zone Identifier
County Coordinate Zone Identifier
Coordinate Offsets or Adjustments Not Applicable
Map Projection Name Transverse Mercator
Map Projection Parameters Not Applicable
Other Coordinate System's Definition Not Applicable
 
Section 5 Entity and Attribute Information Top of full metadata Top of page
Entity and Attribute Overview Data Elements for Attribute Table LULC_GAP1AIM3.TIF:

Entity and Attribute Detailed Citation
 
Section 6 Distribution Information Top of full metadata Top of page
Publisher Minnesota DNR - Division of Forestry
Publication Date 1996-09-04 00:00:00.0
Contact Person Information Hal Watson
GIS Database Coordinator
DNR-MIS
500 Lafayette Road, Box 11
St. Paul, MN 55155-4011
Phone: (651) 259-5508
FAX: (651) 297-4946
E-mail:
Distributor's Data Set Identifier lulc_gap1aim3
Distribution Liability The Minnesota Department of Natural Resources makes no representation or warranties, express or implied, with respect to the reuse of data provided herewith, regardless of its format or the means of its transmission. There is no guarantee or representation to the user as to the accuracy, currency, suitability, or reliability of this data for any purpose. The user accepts the data 'as is', and assumes all risks associated with its use. By accepting this data, the user agrees not to transmit this data or provide access to it or any part of it to another party unless the user shall include with the data a copy of this disclaimer. The Minnesota Department of Natural Resources assumes no responsibility for actual or consequential damage incurred as a result of any user's reliance on this data.
Transfer Format Name TIFF with TFW
Transfer Format Version Number
Transfer Size 71
Ordering Instructions See Online Linkage or Distribution Contact
Online Linkage http://deli.dnr.state.mn.us/
 
Section 7 Metadata Reference Information Top of full metadata Top of page
Metadata Date 2006-08-09 09:15:57.0
Contact Person Information Hal Watson, GIS Database Coordinator
DNR-MIS
500 Lafayette Road, Box 11
St. Paul, MN 55155-4011
Phone: (651) 259-5508
FAX: (651) 297-4946
E-mail:
Metadata Standard Name Minnesota Geographic Metadata Guidelines
Metadata Standard Version 1.2
Metadata Standard Online Linkage http://www.gis.state.mn.us/stds/metadata.htm



This page last updated: 2006-08-09 09:15:57.0