MN/DOT PITS - INDIVIDUAL TEST
HOLES
Field |
Description |
Main ID Information |
Metadata Updated 2007 |
Title |
Blue Earth County Aggregate Evaluation - MN/DOT Pit Labels |
Filename |
Dotpits (ArcView Shapefile) |
Abstract |
This dataset consists of information about the Minnesota Department of Transportation auger test hole locations. |
Place Keywords |
Blue Earth County, Minnesota |
Theme Keywords |
MN/DOT, Test Holes, Drill Holes |
Time Period of Content |
1935-1987 (compiled in 1998) |
Parent Theme |
Dpitslbl.shp |
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 reference the locations of all known and existing MN/DOT auger test holes in Minnesota. Each pit location has several different test holes (10 to over 250). Each of these test holes has unique information associated with it. This dataset includes pit number, test hole number, and location quality. |
Progress |
Complete |
Currentness Reference |
1998-1999 |
Maintenance Frequency |
None planned |
Access Constraints |
NA |
Use Constraints |
NA |
Associated Data Sets |
Dpitslbl.shp and pit_qual.dbf |
Data Quality |
|
Attribute Accuracy |
Theses test hole locations were digitized off MN/DOT pit sheets. Most of these locations were digitized off surveyed pit sheets and 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. |
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 |
This dataset is used to reference the locations of all known and existing MN/DOT auger test holes in Minnesota. Each pit location has several different test holes (10 to over 250). Each of these test holes has unique information associated with it. This dataset includes pit number, test hole number, and location quality. These test hole locations were digitized off MN/DOT pit sheets. 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 individual test hole locations. |
Native Dataset Environment |
ArcView 3.1 / ArcInfo7.2.1 |
Vendor Specific Object Type |
NA |
Tiling Scheme |
County |
Spatial Object Type |
Point |
Transfer Size |
158 kb |
Entities -- Attributes |
|
Entity-Attribute Overview |
These points represent individual test hole locations. These test holes were digitized off MN/DOT pit sheets. |
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 |
Dotpits.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 system-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 system-scheme. |
|
Testhole |
|
Number,3,0 |
Ex: 0,1,2,3,4,5,6,7,8, 9,10,11,12,13,14,15, 16,17,18.............. |
Unique Identifier for the test hole within a pit. |
|
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 and Y. coordinates varied. Good quality locations are probably accurate to within a few meters. Good at least 4 good quality x and y know surveyed reference points were used.. |
|
|
|
|
mod |
The quality of the location is within a 10-20 meters, only 2 or 3 know 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. |