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: