MGC100: Statewide 100 Meter EPPL7/ERDAS/GeoTIFF Data Set

This page last updated: 04/11/2007
Metadata created using Minnesota Geographic Metadata Guidelines


Metadata Summary

Originator Minnesota Land Management Information Center (LMIC)
Abstract MGC100 is a statewide data set that consists of approximately 400 raster-formatted data layers. It is available on a single CD-ROM in either EPPL7, or ERDAS and GeoTIFF formats. The data themes cover a wide range of physical and biological variables along with administrative, political, sociodemographic, and transportation data. The data collection unit for most of the variables is the 40-acre parcel. Files have been subdivided into 100-meter by 100-meter grid cells and spatially corrected to provide improved geographic reference. However, this processing step does not improve the original 40-acre resolution accuracy. The data set is designed for use in regional and statewide planning, not for site-specific decision making. MGC100 is effectively the MLMIS100 county data set appended into a statewide coverage. There is also some 30-meter data for the Twin Cities metropolitan area on this CD.
Browse Graphic none available
Time Period of Content Date
Currentness Reference Varies by data layer
Access Constraints The MGC100 CD is available for $50.
Use Constraints There are no known restrictions on the use of these data. Data use should be consistent with the source, scale, and data capture methods.
Distributor Organization Minnesota Land Management Information Center (LMIC)
Ordering Instructions Contact LMIC to place an order. The CD is $50 and must be prepaid by either check or purchase order (send payment to LMIC's address, Attention: Data and Map Orders). The CD will be sent as soon as payment is received.
Online Linkage none available

Full Metadata

MGC100: Statewide 100 Meter EPPL7/ERDAS/GeoTIFF Data Set

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 Land Management Information Center (LMIC)
Title MGC100: Statewide 100 Meter EPPL7/ERDAS/GeoTIFF Data Set
Abstract MGC100 is a statewide data set that consists of approximately 400 raster-formatted data layers. It is available on a single CD-ROM in either EPPL7, or ERDAS and GeoTIFF formats. The data themes cover a wide range of physical and biological variables along with administrative, political, sociodemographic, and transportation data. The data collection unit for most of the variables is the 40-acre parcel. Files have been subdivided into 100-meter by 100-meter grid cells and spatially corrected to provide improved geographic reference. However, this processing step does not improve the original 40-acre resolution accuracy. The data set is designed for use in regional and statewide planning, not for site-specific decision making. MGC100 is effectively the MLMIS100 county data set appended into a statewide coverage. There is also some 30-meter data for the Twin Cities metropolitan area on this CD.
Purpose MGC100 was developed in order to create a data set with the following characteristics:
1. Statewide coverage
2. Geocorrected format that permits the easy transfer of data between raster and vector systems
3. Alternate coordinates in Zone 15 UTM coordinates
Time Period of Content Date
Currentness Reference Varies by data layer
Progress Complete
Maintenance and Update Frequency None planned
Spatial Extent of Data Minnesota
Bounding Coordinates -97.25
-89.48
49.40
43.50
Place Keywords Minnesota, Twin Cities Metropolitan Area, Anoka County, Carver County, Dakota County, Hennepin County, Ramsey County, Scott County, Washington County
Theme Keywords Administrative Regions, Land Ownership, Public Land Survey, PLS, Agriculture, Climate, Ecological Regions, Elevation, Geology, Hydrogeology, Land Use, Vegetation, Forest Cover, Forest Health, Soils, Water, Minor Civil Divisions, Legislative and Congressional Districts, Transportation
Theme Keyword Thesaurus None
Access Constraints The MGC100 CD is available for $50.
Use Constraints There are no known restrictions on the use of these data. Data use should be consistent with the source, scale, and data capture methods.
Contact Person Information Nancy Rader, Data Distribution and Coordination Specialist
Minnesota Land Management Information Center (LMIC)
658 Cedar Street, 300 Centennial Building
St. Paul, MN 55155
Phone: 651-201-2499
FAX: 651-296-3698
E-mail: clearing.house@state.mn.us
Browse Graphic none available
Browse Graphic File Description Not applicable
Associated Data Sets An updated version of this data set, containing several additional data layers and improved documentation, is available with the purchase of the EPIC2000 software CD. The updated version does not include the ERDAS and GeoTIFF formats, only the EPPL format.

For more information about EPIC, EPIC2000, EPPL7 Version 3, and the associated data sets, see the website at: http://www.mnplan.state.mn.us/EPPL7 or call 651-296-1201.

 
Section 2 Data Quality Information Top of full metadata Top of page
Attribute Accuracy Varies with data layer
Logical Consistency Not applicable
Completeness All Minnesota counties are complete.
Horizontal Positional Accuracy Unknown
Vertical Positional Accuracy Not applicable
Lineage In 1969, the Minnesota Land Management Information System (MLMIS), then located at the University of Minnesota, began to develop the original MLMIS40 statewide database. The MLMIS40 database recorded resource characteristics for every 40-acre parcel of land in the state using the Public Land Survey (PLS) as the reference system. Data in MLMIS40 are generally from map sources that range in scale from 1:24,000 to 1:1,000,000. Much of the original data entry was done with the classic grid-cell overlay technique. Each square, or raster, represented a 40-acre parcel creating a statewide database of about 1.4 million cells. By the late 1980s, the need for more detailed data for local GIS applications led to the development of MLMIS100, a new data standard with a finer spatial resolution. The MLMIS100 county data set is the geocorrected 100-meter resolution version of the MLMIS40 statewide data set.

In 1993, as part of the EPIC software development project, a new data standard was created for use with raster GIS. The MGC100 (MLMIS Geocorrect 100 meter) data set was created primarily by appending all the MLMIS100 county data layers together. However, some of the MGC100 data layers are actually 40-acre resolution data that have been rescaled to 100 meters. These data layers contain the exact same information as their MLMIS40 counterparts. In some instances, MLMIS40 data layers have been converted to the MGC100 data standard by first converting the MLMIS40 layer to an 'MGC40' layer that is geocorrect, and then rescaling this layer to 100-meter data. These layers also retain the characteristics and resolution of the original 40-acre files. Today, most new data layers are first digitized into ARC/INFO format and then converted to the MGC100 data standard at map scales that vary from 1:24,000 to 1:1,000,000.

In January 1998, the MGC100 data set was converted from NAD27 to NAD83 datum. GIS specialists and programmers from MN Dept. of Natural Resources, the Board of Water and Soil Resources, and LMIC cooperatively developed a standardized conversion process. It was determined that the difference between the two datums was small enough across any arbitrary area in Minnesota that it was sufficient to shift the files by the difference between NAD27 and NAD83. This procedure was adequate for the conversion of vector data sets but it caused cell mismatches when mosaicking raster data sets. Therefore, in order to create a uniform raster data set, LMIC shifted the EPPL7 files by adjusting the file extents to a multiple of the cell size, such that the actual cell size matched the nominal one, i.e. 100-meter data was made to be exactly 100 meters, with the edge of the file on 100-meter boundaries. Next, the 100-meter data was adjusted by 2 cells (200 meters) in the y direction. There was no need to adjust the files in the x direction because the difference between NAD27 and NAD83 datums is generally less than 10 meters.

ERDAS and GeoTIFF formats were created from the EPPL files.
Source Scale Denominator
 
Section 3 Spatial Data Organization Information Top of full metadata Top of page
Native Data Set Environment EPPL7
Geographic Reference for Tabular Data None
Spatial Object Type Raster
Vendor Specific Object Types Cell
Tiling Scheme County
 
Section 4 Spatial Reference Information Top of full metadata Top of page
Horizontal Coordinate Scheme UTM
Ellipsoid GRS80
Horizontal Datum NAD83
Horizontal Units Meters
Distance Resolution Unknown
Altitude Datum Not applicable
Altitude Units Not applicable
Depth Datum Not applicable
Depth Units Not applicable
Cell Width 100
Cell Height 100
UTM Zone Number 15E
Coordinate Offsets or Adjustments None
 
Section 5 Entity and Attribute Information Top of full metadata Top of page
Entity and Attribute Overview The MGC100 data set has been organized into thematic groups. Each thematic group contains a set of individual layers similar in their generic content. Within each thematic group, data layers depict individual attributes consistent with the EPPL7 file structure as single variable files. A few of the thematic layers are listed below. Some of these data layers are also available as 30-meter raster-formatted files for the seven county Twin Cities Metropolitan Area. Several additional layers are available only for the metropolitan area; these are listed below.

ADMINISTRATIVE AND POLITICAL BOUNDARIES
Administrative Regions:
Counties (from MN Department of Transportation county highway maps)
Department of Natural Resources administrative regions
U.S. Geological Survey quadrangle boundaries: 1:24,000, 1:100,000, 1:250,000
Zip codes, 1995

Land Ownership:
Administering agency, Department of Natural Resources and tax forfeit land, 1992
Basic ownership, 1983 (federal, state, county, private)
Department of Natural Resources ownership, 1992
Public ownership, 1983

Public Land Survey:
Township numbers, range numbers, section numbers, 40-acre parcel, townships

PHYSICAL AND BIOLOGICAL
Agricultural:
Cropland potential productivity, 1979

Climate:
Average precipitation: annual, monthly and growing season (May-September)
Average temperature: annual, monthly and seasonal
Frost: first fall, last spring
Growing degree and heating degree days, growing season
National Weather Service data zones
U.S. Forest Service homoclimes, 1984
Water balance: evapotranspiration, runoff, Palmer Index (8/12/95), shortfall (1987-89)

Ecological Regions:
Ecological biomes (coniferous, deciduous, prairie)
Ecological Classification System: provinces, sections and 1995 subsections

Elevation:
Elevation, aspect, slope (all derived from 1:250,000-scale U.S. Geological Survey Digital Elevation Models)

Geology and Hydrogeology:
Aquifer materials
Depth to bedrock (includes rock outcrops)
Geomorphic regions
Ground water susceptibility to pollution
Quaternary geology
Recharge potential

Land Use:
Land use, 1969

Vegetation:
Forest cover, 1977 and 1990
Forest cover from Landsat imagery for Department of Natural Resources Region 6 (7 county metropolitan area)
Forest health: aspen defoliator complex, blowdown, fall defoliator complex, forest tent caterpillar, gypsy moth, introduced pine sawfly, jack pine budworm, larch sawfly, large aspen tortrix, oak wilt, spruce budworm, variable oak leaf caterpillar, and white pine blister rust.
Minnesota Society of Arboriculture tree rating zones
Native tree ranges: 90 different species
Presettlement vegetation (Marschner map)
Public land survey bearing trees
Vegetative zones: 7 categories
USDA hardiness zones, 1990

Soils:
Minnesota Soils Atlas information: acidic soil, available phosphorus and potassium, available water to depth of five feet, depth to bedrock (does not include rock outcrops), drainage class, erodibility (K-factor), hydrologic groups, landform description, landscape position, permeability rate, pH, shrink-swell potential, slope class, soil type, texture
Nonatlas sources: engineering class, flood potential, sedimentation, water erosion, wind erosion
Pollution Control Agency data: soil materials, vadose zones materials

Water:
Major and minor watersheds
Proximity to water
Rivers (U.S. Geological Survey, line data)

SOCIODEMOGRAPHIC
1990 Census: minor civil divisions and tracts
Federal congressional districts, 1994
State Senate and legislative districts, 1990
School districts, 1990 and 1995-96

TRANSPORTATION
Interstate highways (line data)
Proximity to highways
State highways (U.S. Geological Survey, line data)

METROPOLITAN LAYERS ONLY
Forest cover level 1, 1988
Forest cover level 2, 1996
Land cover from Landsat Thematic Mapper imagery, 1990
Metropolitan Council Metropolitan Urban Service Area boundary
Natural Heritage resources identified by 40-acre parcel
Photo index of fall color infrared photography (CIR), 1994
Population density
Entity and Attribute Detailed Citation 'MGC100 Data Documentation', formerly called 'Data Documentation for 40-Acre and 100-Meter Data for Use with EPPL7 on IBM PCs, PS/2s, or Compatibles'. Land Management Information Center, Minnesota Planning. 1996.

MGC100 data users are encouraged to obtain a copy of 'MGC100: Revisiting MLMIS40 Raster Data in 16-bit', by Thomas G. Eiber, Les Maki, and Ken Pekarek. This paper was presented at the 1996 Minnesota GIS/LIS Conference held September 25-27, 1996 in St. Louis Park, MN. A copy of this paper may be obtained by contacting Ken Pekarek - EPPL7 Coordinator: eppl7@lmic.state.mn.us or call 651-296-1201
 
Section 6 Distribution Information Top of full metadata Top of page
Publisher Minnesota Land Management Information Center (LMIC)
Publication Date 04/17/1997
Contact Person Information Nancy Rader
Data Distribution and Coordination Specialist
Minnesota Land Management Information Center (LMIC)
658 Cedar Street, 300 Centennial Building
St. Paul, MN 55155
Phone: 651-201-2499
FAX: 651-296-3698
E-mail: clearing.house@state.mn.us
Distributor's Data Set Identifier mgc100old
Distribution Liability Limitations: Although extensive effort has been made to produce error free and complete data, all geographic information has limitations due to the scale, resolution, date and interpretation of the original source materials. You should consult available data documentation (metadata) for these particular data to determine their limitations and the precision to which they depict distance, direction, location or other geographic characteristics. These data may be subject to periodic change without prior notification.

No Warranty: These data are provided as is, without any warranty whatsoever, including but not limited to any warranty as to their performance, merchantability, or fitness for any particular purpose.

Liability: The entire risk as to the results of the use of these data is assumed by the user. LMIC is not responsible for any interpretation or conclusions based on these data made by those who acquire or use it. LMIC shall not be liable for any direct, indirect, special, incidental, compensatory or consequential damages or third party claims resulting from the use of these data, even if LMIC has been advised of the possibility of such potential loss or damage. In States that do not allow the exclusion or limitation of incidental or consequential damages, you may not use these data.

Data Delivered on Electronic Media: If these data have been requested from LMIC on magnetic media, CD-ROM or any other physical media, LMIC will deliver this product in the computer-readable format agreed upon with the requestor. LMIC will re-issue these data if they are determined unreadable by correctly adjusted computer input devices, or when the medium is delivered in a damaged condition. Requests for re-issue of this digital data product must be made within 30 days of the date shipped from LMIC.
Transfer Format Name EPPL7 or ERDAS or GeoTIFF
Transfer Format Version Number 3.0
Transfer Size 1 CD-ROM
Ordering Instructions Contact LMIC to place an order. The CD is $50 and must be prepaid by either check or purchase order (send payment to LMIC's address, Attention: Data and Map Orders). The CD will be sent as soon as payment is received.
Online Linkage none available
 
Section 7 Metadata Reference Information Top of full metadata Top of page
Metadata Date 04/11/2007
Contact Person Information Michael Sowers, Research Analyst
Minnesota Land Management Information Center (LMIC)
658 Cedar Street, 300 Centennial Building
St. Paul, MN 55155
Phone: 651-201-2499
FAX: 651-296-3698
E-mail: clearing.house@state.mn.us
Metadata Standard Name Minnesota Geographic Metadata Guidelines
Metadata Standard Version 1.2
Metadata Standard Online Linkage http://www.lmic.state.mn.us/gc/stds/metadata.htm


This page last updated: 04/11/2007