Minnesota Department of Natural Resources

GIS Data Layer Description for: Quarry.shp

SECTION 1: Identification Information

Originator: Minnesota Geological Survey and MN DNR - Division of Lands and Minerals

Title: Minnesota River Valley Mineral Resources Project - Quarry.shp

Abstract:

Purpose:

Time Period

of Content: 1991

Currentness

Reference: This data was made digital from the most recent USGS sources available. Digital Orthophoto Quadrangles (DOQs) using 1991 air photos were utilized, as well as Digital Raster Graphics (DRGs) from 1991 quadrangle maps. Original ARC/INFO processing was performed in June 1997.

Progress: In work

Maintenance and Update

Frequency: As needed

Spatial Extent

of Data: The study area for this project included all townships that lie at least partially within a six-mile buffer zone around the Minnesota River.

Place Keywords: Minnesota River Valley

Theme Keywords: Resource, Quarry, Activity, Company, Carbonate, Granite, Kaolin, Quartzite

Access

Constraints: None

Use Constraints: None

Associated Data

Sets: This data set was created at the same time and using the same source data as Gravelr.shp and Smalpits.shp, also compiled by the MGS and Division of Lands and Minerals.

Contact Information

Contact Person: Dennis Martin

Contact Organization: MN Dept of Natural Resources - Lands and Minerals

Contact Person Position: Sr. Geologist

Contact Address: 500 Lafayette Rd.

Contact City: St. Paul

Contact State: MN

Contact Zip Code: 55155-4045

Contact Voice Phone: (612) 297-1125

Contact Fax Phone: (612) 296-5939

Contact E-mail Address: dennis.martin@dnr.state.mn.us

SECTION 2: Data Quality Information

Attribute

Accuracy:

Logical

Consistency: Data are topologically correct using ARC/INFO 7.0.3. All polygons are closed and lines intersect where intended.

Completeness: Data exist for the Minnesota River Valley study area, as described in Section 1, Spatial Extent of Data. Pits and quarries larger than approximately one acre are included in the data, with acreage automatically calculated and recorded. Quarries created since 1991 may or may not be included, as they were not present on the DOQs or DRGs at that time. Some recent features, especially kaolin clay quarries, have been approximated and freehand digitized to be included in this data set. Some attribute information is incomplete, as verification of commodity, activity, and company associated with a particular pit or quarry is not available for all features.

Horizontal Positional

Accuracy:

Vertical Positional

Accuracy:

Lineage: At the MGS, individual polygons were created by tracing the outline of the disturbed area around a pit or quarry found on the Digital Orthophoto Quadrangle, or DOQ, (Digital Raster Graphics, DRGs, were used when a DOQ was unavailable for a county in the study area) with the on-screen digitizing tool in ArcView 3.0. Each DOQ covers 3.75 minutes in longitude and is a digital copy of 1991 air photos. For the counties which only had DRGs available (scanned 7.5 minute topographic quadrangles from 1991), mines were first located on the paper topographic maps (same scale and date), then found on real air photos (not DOQs) from the NAPP 1991-1992 1:40,000 scale color-infrared set. Then, to the best of the compiler's ability, the mine outlines were freehand digitized on top of the DRGs, again using the on-screen digitizing tool in ArcView 3.0. The polygons created using the DRGs are less accurately drawn, however, since they were not drawn directly on top of a DOQ. The polygons were captured in two original shape files, on in UTM Zone 14 and one in UTM Zone 15. At the DNR, the shape files were made into ARC/INFO polygon coverages, then projected into UTM Zone 15, so the two coverages could be mapjoined. Items in the attribute tables were adjusted to match exactly prior to performing the mapjoin. The coverage was then made into a final shape file for use in ArcView 3.0. The data was compared to DNR Report 282 data from 1990 to check approximate positional and attribute accuracies. Items were added to the table for verification purposes of resources, activity, and companies.

Source Scale

Denominator:

SECTION 3: Spatial Data Organization

Native Data Set

Environment: ArcView GIS 3.0

Geographic Reference for

Tabular Data: A 6-digit identification number whose first two digits correspond to the 2-digit county code in general use statewide. The third through sixth digits sequentially number the incidence of minesites beginning with 1001. As an example, the first minesite located in Redwood County is designated 641001, the second is designated 641002, and so on.

Spatial Object

Type: Vector

Vendor Specific

Object Types: Arc, Node, Label, Point, Polygon

Tiling Scheme: Q100K

SECTION 4: Spatial Reference Information

Horizontal Coordinate

Scheme: UTM

Ellipsoid: GRS1980

Horizontal

Datum: NAD83

Horizontal Units: Meters

UTM Zone

Number: 15

SECTION 5: Entity and Attribute Information

Entity-Attribute

Overview: Polygon features attributized as type of resource found in the associated pit or quarry, including carbonate, granite (or gneiss), kaolin, quartzite, or sandstone.

Entity-Attribute Detailed

Table Name | Field Name | Begin Column | Definition | Valid Values | Descriptions
quarry.pat |  |  |  |  |
| source_inf |  | 12,12,C | atlas, personal com, DOQ, report, topo | Information used to find each particular mine.
| Ida |  | 8,9,F,0 | 61001-871999 | Unique identification number for each mine. First 1 or 2 digits are the county code, and the last 4 digits are numbered sequentially in order of incidence of minesites beginning with 1001 for each county.
| resource |  | 16,16,C |  | Commodity mined in pit or quarry, with no differentiation between crushed and dimension stone.
| activity |  | 12,12,C | active, inactive, intermit act | Activity was either obvious as seen on the DOQ or was taken from the designation in the Pit and Quarry Report 282 (1990), if found.
| county |  | 17,17,C |  | Name of the county within which the mine is located. All counties are in Minnesota.
| area_sq_m |  | 8,16,F,2 |  | ArcView calculated the area for each polygon initially in square meters.
| area_acres |  | 8,16,F,2 |  | Area in square meters was converted to acreage (there are 0.0002471 acres per square meter).
| mndot |  | 8,8,F,0 |  | If a mine corresponds with any point-located mine in the Minnesota Department of Transportation's database, the "uniquexx" number from the MNDOT database is put into this column.
| reference |  | 65,65,C |  | Specific information source used to find each particular mine. The most common reference source is the 7.5 minute USGS topographic quadrangle.
| verifact |  | 2,12,C | active, inactive, intermit act | Verified activity status.
| vcommod |  | 16,16,C |  | Verified commodity
| company |  | 30,30,C |  | Verified company who either owns or controls each mine.

SECTION 6: Distribution Information

Publisher: MN Department of Natural Resources - Division of Lands and Minerals

Publication Date:

DistributorContact Person: Dennis Martin

Distributor Organization: MN Dept. Of Natural Resources - Lands and Minerals

Distributor Position: Sr. Geologist

Distributor Address: 500 Lafayettte Rd.

Distributor City: St. Paul

Distributor State: MN

Distributor Zip Code: 55155-4045

Distributor Voice Phone: (612) 297-1125

Distributor Fax Phone: (612) 296-5939

Distributor E-mail Address: dennis.martin@dnr.state.mn.us

Distributor's Data Set Identifier: Minnesota River Valley Quarry.shp

Distribution Liability: