| 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/ |
| 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 |
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| 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 | |
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| 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.
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| 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: |
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| 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: |
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| 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: |
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| 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 | |||
