Full Metadata -
View Attributes -
View Sample  -
Get Data -


GAP Land Cover - Tiled Raster

This page last updated: 2006-08-09 09:16:23.0
Metadata created using Minnesota Geographic Metadata Guidelines


Metadata Summary

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/


Full Metadata
GAP Land Cover - Tiled Raster

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 - 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
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_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.

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 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.

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:
 
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:
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:
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 09:16:23.0