Field |
Description |
Main ID Information |
Metadata Updated 2007 |
Title |
Blue Earth County Aggregate Evaluation - MN/DOT Pit Labels |
Filename |
Dpitslbl (ArcView Shapefile) |
Abstract |
This dataset consists of information about the Minnesota Department of Transportation Gravel Pit Locations and their identification. |
Place Keywords |
Blue Earth County, Minnesota |
Theme Keywords |
MN/DOT, Gravel Pits, ASIS, Pit Locations, Pit Labels |
Time Period of Content |
1935-1987 (compiled in 1998) |
Parent Theme |
NA |
Spatial Extent of the Data |
Blue Earth County, Minnesota |
Contact Person |
Aggregate Resources Mapping Program |
Contact Person Organization/Division |
Department of Natural Resources, Division of Minerals |
Contact Person Position |
Geologist or GIS Specialist |
Contact Address |
500 Lafayette Road, Box 45 |
Contact City |
St. Paul |
Contact Zip Code |
55155-4045 |
Contact Voice Phone |
651-259-5959 |
Contact Fax Phone |
651-296-5939 |
Additional ID Information |
|
Originator |
Department of Natural Resources, Division of Minerals, Mineral Potential Section |
Purpose |
This dataset is used to uniquely identify each known and existing MN/DOT aggregate resource where test holes were drilled by auger. Use associated shapefile, DOTPITS, to identify the locations of the test holes. |
Progress |
Complete |
Currentness Reference |
1998-1999 |
Maintenance Frequency |
None planned |
Access Constraints |
NA |
Use Constraints |
NA |
Associated Data Sets |
Dotpits.shp and pit_qual.dbf |
Data Quality |
|
Attribute Accuracy |
Theses pit locations are the centroid of a gravel pit or centroid of an area of test holes. Most of these locations were digitized off surveyed pit sheets, and are very accurate. However, it was difficult to obtain 4 reference points for all these pits, so some may not be as accurate. A column within the database describes the accuracy. |
Logical Consistency |
NA |
Completeness |
These locations were digitized off surveyed point locations, thus the information should be fairly accurate (within 10 meters). |
Horizontal Positional Accuracy |
1:1000 |
Vertical Positional Accuracy |
NA |
Lineage |
Theses pit locations are the centroid of a gravel pit or centroid of an area of test holes. Most of these locations were digitized off surveyed pit sheets, thus are very accurate, however, it was difficult to obtain 4 reference points for all these pits, thus some may not be as accurate. A column within the database describes the accuracy. |
Source Scale Denominator |
1:1000 |
Spatial Reference |
|
Horizontal Coordinate Scheme |
UTM |
Ellipsoid |
GRS80 |
Horizontal Datum |
NAD83 |
Horizontal Units |
Meters |
Distance Resolution |
NA |
Altitude Datum |
NA |
Altitude Units |
NA |
Depth Datum |
NA |
Depth Units |
NA |
UTM Zone Number |
15 |
Raster only |
|
Cell Width |
NA |
Cell Height |
NA |
Spatial Data Organization |
|
Geographic Reference for Tabular Data |
These points represent the centroid of a gravel pit or the centroid of a series of test holes. Each of these pits were digitized from MN/DOT pit sheets, thus have a unique pit number. |
Native Dataset Environment |
ArcView 3.1 / ArcInfo7.2.1 |
Vendor Specific Object Type |
NA |
Tiling Scheme |
County |
Spatial Object Type |
Point |
Transfer Size |
6.29 kb |
Entities -- Attributes |
|
Entity-Attribute Overview |
These points represent the centroid of a gravel pit or the centroid of a series of test holes. Each of these pits were digitized from MN/DOT pit sheets, thus have a unique pit number. |
Entity-Attribute Detailed Citation |
See table below: Arcview specific fields include shape (i.e., feature type = point), area (0 for points), perimeter (0 for points), filename (unique id for point, assigned by the software), filename_i or filename_id if filename is less than 8 characters (an id usually assigned during theme creation). |
Table Name |
Field Name |
Begin Column |
Definition |
Valid Values |
Descriptions |
Dpitslbl.shp |
Pitno |
|
Number,5,0 |
Ex: 1035,1046, 4866, 5058,5251, 7049 |
This is the unique identifier that MN/DOT assigned to its pits (OLD numbering scheme). |
|
Pitnoltr |
|
Text, 2 |
Ex: A, AB, B, or C |
Sometimes 2 or three pits grow together, or a pit expands so they put a modifier on the unique identifier instead of a new pit number (Ex: 1035A and 1035B). OLD numbering scheme. |
|
Plotyn |
|
Text, 1 |
Y |
Several gravel pits were close together so that on a 1:100,000 scale map they were on top of each other. Where this occurred only one location was plotted and thus represented more than one pit location. |
|
|
|
|
N |
The pit was not plotted on the 1:100,000 scale map due to clustering. |
|
Shale_spec |
|
Text, 1 |
Y |
If the MN/DOT pit samples passed the specifications for shale/deleterious material then Y = yes. |
|
Locat_qual |
|
Text, 4 |
good |
The Mn/DOT pit sheets have the drill hole locations surveyed and plotted on a grid. As these points were digitized, the quality of given X, Y, and Z coordinates varied. Good quality locations are probably accurate to within a few meters; at least 4 good quality x and y known surveyed reference points were used. |
|
|
|
|
mod |
The quality of the location is within a 10-20 meters, only 2 or 3 known x and y reference locations were used. |
|
|
|
|
poor |
There was not sufficient evidence to pinpoint the hole locations, however they are located as best as they could be with reference points such as road intersections, fence lines, trees, home locations, etc. |
|
Sourcexx |
|
Text, 5 |
Ex: 07010, 07018 |
This is the new numbering scheme used by MN/DOT. These numbers are the unique identifiers of the pits. |
|
Sourcexx2 |
|
Text, 5 |
Ex: 07052, 07063 |
This is the new numbering scheme used by MN/DOT. These numbers are the unique identifiers of the pits that have more than one identifier (Example 1045AB). This file would represent the new unique identifier for 1045B. |
|
Rec_Status |
|
Text_9 |
Dead File |
If the pit sheet had a stamp "DEAD FILE", the pit was not assigned a new unique identifier (sourcexx). |
|
Asisrec |
|
Text, 1 |
Y |
MN/DOT has aggregate information about its pits stored in the ASIS (Aggregate Source Information System) database. If the pit sheets are included in this file, then Y = yes |
|
|
|
|
N |
If these pits are not included in the ASIS database, then N = No. |
|
Year |
|
Number,4,0 |
Ex: 1935, 1941, 1987 |
This represents the year that the drilling took place; the year is listed on the pit sheet. |