COUNTY WELL INDEX (CWI) - WELL
LOCATIONS
Field |
Description |
Main ID Information |
Metadata Updated 2007 |
Title |
Blue Earth County Aggregate Evaluation - County Well Index (CWI- MGS Database) |
Filename |
Cwi98pt3 (ArcView Shapefile) |
Abstract |
This dataset consists of the locations of wells drilled within Blue Earth County. The County Well Index (CWI) is a database that contains information about wells drilled throughout Minnesota, this data base was used to look at the geological descriptions of these wells. |
Place Keywords |
Blue Earth County, Minnesota |
Theme Keywords |
CWI, Wells, County Well Index, Geological Descriptions |
Time Period of Content |
Downloaded 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 |
Minnesota Geological Survey |
Purpose |
This dataset contains the locations of the wells that were used for this study; approximately 1550 of these 2552 wells contained geological descriptions that were used in this study. |
Progress |
Complete |
Currentness Reference |
1998 |
Maintenance Frequency |
None planned |
Access Constraints |
NA |
Use Constraints |
NA |
Associated Data Sets |
cwi_geod.dbf : 0ne-to-many (cwi98pt3-to-cwi_geod.dbf). Relate on unique_no. |
Data Quality |
|
Attribute Accuracy |
The locational accuracy of these points varies. Some of the points were field checked down to the meter, others are the centroid of a 40, 10, ... acre parcel. See the complete CWI files ordered through the Minnesota Geological Survey for more detail. |
Logical Consistency |
NA |
Completeness |
The locational accuracy of these points varies. Some of the points were field checked down to the meter, others are the centroid of a 40, 10, .... acre parcel. See the complete CWI files ordered through the Minnesota Geological Survey for more detail. |
Horizontal Positional Accuracy |
1:1000 |
Vertical Positional Accuracy |
NA |
Lineage |
The geological descriptions from these test holes were used to make interpretations and test interpretations about the geology, aggregate resources, and glacial and bedrock history of the area. |
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 wells drilled throughout Blue Earth County by a variety of sources. |
Native Dataset Environment |
ArcView 3.1 / ArcInfo7.2.1 |
Vendor Specific Object Type |
NA |
Tiling Scheme |
NA |
Spatial Object Type |
Point |
Transfer Size |
385 kb |
Entities -- Attributes |
|
Entity-Attribute Overview |
These points represent individual wells drilled throughout Blue Earth County by a variety of sources; referred to as the CWI. |
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 |
Cwi98pt3.shp |
Unique_no |
|
Text, 6 |
Ex:102304, 102333 |
These are the unique identifiers for the wells (Relate item with cwi_geod.dbf). |
|
Geoc_date |
|
Number,8,0 |
Ex:19970225 |
The first four numbers represent the year, the next two numbers represent the month and the last two numbers represent the day of the month. |
|
UTM_e83 |
|
Number, 12,3 |
Ex: 390032.5 |
X-coordinate location in UTM - NAD83, Zone15. |
|
UTM_n83 |
|
Number 12,3 |
Ex: 4855510 |
Y-coordinate location in UTM - NAD83, Zone15. |
|
Hadgeodesc |
|
Text, 1 |
Y |
Had geological Descriptions. These wells had geological descriptions that were used in this study. Y=Yes. |
|
|
|
|
N |
Did not use these geological descriptions. N=No |