Data Dictionary
| Data Label | Feature | Class | Attribute | Description |
| aquifer.txt | - | - | - | file containing aquifer names and corresponding aquifer codes |
| AppG.txt | - | - | - | file containing a description of what is contained in the TWDB files |
| wlevels.txt | - | - | - | contains water depth entries |
| weldta.txt | - | - | - | contains well location and elevation |
| twdb.xls | - | - | - | workbook with macro that prepares wlevels.txt and weldta.txt for Arcview |
| county.shp, .dbf, .shx | counties of Texas | arc | county names | - |
| 4county70.csv | well locations | point | well data | event theme: well data for Lubbock, Hale, Hockley and Lamb counties for January 1970 |
| 4county81.csv | well locations | point | well data | event theme: well data for Lubbock, Hale, Hockley, and Lamb counties for January 1981 |
| 4count70.shp, .dbf, .shx | well locations | point | well data | 4county70.csv converted to a shapefile |
| 4county81.shp, .dbf, .shx | well locations | point | well data | 4county81.csv converted to a shapefile |
| Thick70.shp, .dbf, .shx | well locations | point | well data | all entries with no depth data were deleted, aquifer thickness column added |
| Lift70.shp, .dbf, .shx | well locations | point | well data | data for points that intersect 4county81.shp |
| Lift81.shp, .dbf, .shx | well locations | point | well data | data for points that intersect 4county70.shp |
| *.adf | - | raster | - | grids from point shape files |
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