| Originator | Minnesota DNR - Division of Forestry |
| Abstract | This raster dataset is a 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 | Thematic maps produced by computer analysis of satellite-observed spectral reflectance values are more strongly influenced by tones and colors of objects than by their site or spatial arrangement. The particular vegetation typology employed, the choice and sequence of analysis operations, and the dates and seasons of the images may be expected to cause differences between this and other satellite-based classifications. An unaggregated version of this dataset, in which the smallest units are 30-meter (about 1/4-acre) picture elements rather than 1-acre minimum mapping units, is available through DNR Resource Assessment for those requiring greater textural detail. |
| 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 - Tiled Raster | |||
| Abstract | This raster dataset is a 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 | Thematic maps produced by computer analysis of satellite-observed spectral reflectance values are more strongly influenced by tones and colors of objects than by their site or spatial arrangement. The particular vegetation typology employed, the choice and sequence of analysis operations, and the dates and seasons of the images may be expected to cause differences between this and other satellite-based classifications. An unaggregated version of this dataset, in which the smallest units are 30-meter (about 1/4-acre) picture elements rather than 1-acre minimum mapping units, is available through DNR Resource Assessment for those requiring greater textural detail. | |||
| Purpose | The dataset was created for use in the Geological Survey's Gap Analysis Program (GAP) , a national project aimed at prioritizing lands for conservation action. Other uses include stratification of inventories, land use planning, and spatial analysis of landscape patterns. | |||
| 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_GAP1ART3.DBF: 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 all cover types exist as mappable units in all ECS subsections of the state. Some types omitted from classification in a given subsection may be classified in an adjacent subsection. This, or other circumstances, may give rise to type mismatches across subsection boundaries. | |||
| 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_GAP1ART3.DBF: 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 | q250k | |||
| 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_GAP1ART3.DBF: COUNT: A count of the number of 30-meter pixels in the data set that are associated with the entry in the VALUE column. GPU: GAP Processing Unit Number GAPLVL4ID: Minnesota GAP classification level 4 land-use/land-cover class code. Level 4 is the most detailed level of the classification. GAPLVL4PAC: Level 4 percent accuracy score for this land-use/land-cover class (see GAPLVL4ID) in this processing unit (see GPU). GAPLVL4TXT: Minnesota GAP classification level 4 land-use/land-cover class name. GAPLVL3ID: Minnesota GAP classification level 3 land-use/land-cover class code. GAPLVL3PAC: Level 3 percent accuracy score for this land-use/land-cover class (see GAPLVL3ID) in this processing unit (see GPU). GAPLVL3TXT: Minnesota GAP classification level 3 land-use/land-cover class name. GAPLVL2ID: Minnesota GAP classification level 2 land-use/land-cover class code. GAPLVL2PAC: Level 2 percent accuracy score for this land-use/land-cover class (see GAPLVL2ID) in this processing unit (see GPU). GAPLVL2TXT: Minnesota GAP classification level 2 land-use/land-cover class name. GAPLVL1ID: Minnesota GAP classification level 1 land-use/land-cover class code. GAPLVL1PAC: Level 1 percent accuracy score for this land-use/land-cover class (see GAPLVL1ID) in this processing unit (see GPU). GAPLVL1TXT: Minnesota GAP classification level 1 land-use/land-cover class name. VALUE: Concatonation of GAP processing unit code and GAP level 4 vegetation classification code. This column provides the basis for assigning accuracy assessment information to each pixel. |
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| Entity and Attribute Detailed Citation | Value Domain for Data Element GPU: 1 = Red River Prairie & Aspen Parklands 2 = Agassiz Lowlands West 3 = Agassiz Lowland East 4 = Border Lakes West 5 = Border Lakes East 6 = Hardwood Hills North 7 = Chippewa Plains West 8 = Chippewa Plains East 9 = St. Louis Moraines 10 = Nashwauk Uplands 11 = Tamarack Lowlands North 12 = Laurentian Uplands 13 = North Shore Highlands 14 = Red River Prairie - Mid 15 = Pine Moraines & Outwash Plains 16 = Tamarack Lowlands South 17 = Red River Prairie & Hardwood Hills 18 = Hardwood Hills South 19 = Mille Lacs Uplands & Glacial Lake Superior Plain 20 = Anoka Sand Plain 21 = Minnesota River Prairie & Coteau Moraines 22 = Minnesota River Prairie - Mid 23 = Big Woods & St. Paul Baldwin Plains and Moraines 24 = Inner Coteau & Coteau Moraines 25 = Minnesota River Prairie - South 26 = Oak Savanna & Rochester Plateau 27 = Blufflands Value Domain for Data Element GAPLVL4ID: 1 = Developed 2 = High Intensity Urban 3 = Low Intensity Urban 4 = Transportation 5 = Barren 6 = Cropland 7 = Grassland 8 = Prairie 9 = Upland Shrub 10 = Lowland Deciduous Shrub 11 = Lowland Evergreen Shrub 12 = Water 13 = Floating Aquatic 14 = SEDGE MEADOW 15 = Broadleaf Sedge/Cattail 16 = Jack Pine 17 = Red/White Pine 18 = Red Pine 19 = White Pine mix 20 = Balsam Fir mix 21 = White Spruce 22 = Upland Black Spruce 23 = Upland Northern White Cedar 24 = Redcedar 25 = Upland Conifer 26 = Lowland Black Spruce 27 = Stagnant Black Spruce 28 = Tamarack 29 = Stagnant Tamarack 30 = Lowland Northern White-Cedar 31 = Stagnant Norhern White-Cedar 32 = Stagnant Conifer 33 = Aspen/White Birch 34 = Oak 35 = Bur/White Oak 36 = Red Oak 37 = Northern Pin Oak 38 = Maple/Basswood 39 = Upland Deciduous 40 = Black Ash 41 = Silver Maple 42 = Cottonwood 43 = Lowland Deciduous 44 = Upland Coniferous-Deciduous mix 45 = Jack Pine-Deciduous mix 46 = Red/White Pine-Deciduous mix 47 = Spruce/Fir-Deciduous mix 48 = Redcedar-Deciduous mix 49 = Lowland Conifer-Decidious mix Value Domain for Data Element GAPLVL3ID: 50 = Developed 51 = Barren 52 = Cropland 53 = Grassland 54 = Upland Shrub 55 = Lowland Shrub 56 = Aquatic 57 = Marsh 58 = Pine 59 = Spruce/Fir 60 = Upland Cedar 61 = Upland Conifer 62 = Lowland Black Spruce 63 = Tamarack 64 = Lowland Northern White-Cedar 65 = Stagnant Conifer 66 = Aspen/White Birch 67 = Oak 68 = Maple/Basswood 69 = Upland Deciduous 70 = Black Ash 71 = Silver Maple 72 = Cottonwood 73 = Lowland Deciduous 74 = Upland Conifer-Deciduous mix 75 = Pine-Decidious mix 76 = Spruce/Fir-Deciduous mix 77 = Redcedar-Deciduous mix 78 = Lowland Conifer-Deciduous mix Value Domain for Data Element GAPLVL2ID: 80 = Non-Vegetated 81 = Crop/Grass 82 = Shrubland 83 = Aquatic Environments 84 = Upland Conifer Forest 85 = Lowland Conifer Forest 86 = Upland Deciduous Forest 87 = Lowland Deciduous Forest 88 = Upland Conifer-Deciduous mix 89 = Lowland Conifer-Deciduous mix Value Domain for Data Element GAPLVL1ID: 90 = Non-Forest 91 = Conifer Forest 92 = Deciduous Forest 93 = Conifer/Deciduous mix Value Domain for Data Element GAPLVL1PAC: |
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| Section 6 | Distribution Information | Top of full metadata | Top of page | |
| Publisher | Minnesota DNR - Division of Forestry | |||
| Publication Date | 2002-06-06 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_gap1art3 | |||
| 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 | ArcASCII | |||
| Transfer Format Version Number | 8.x | |||
| Transfer Size | ||||
| 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 09:16:23.0 | |||
| 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: |
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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 | |||
