No known overshoots, undershoots, dangles or open polygons are known to exist. Both electronic and visual searches were made for such errors. All polygons have attributes. The polygons were modified to make a consistent map. The original map units are shown on the source shape file.
All polygons have labels.
The geologic maps used were in electronic and paper formats. The electronic maps used were joined together using ArcEdit. The digitized paper maps were joined to the previously joined maps. Each of the source maps used different geologic units. In addition, the boundaries between the maps were preserved to close polygons that do not extend across map boundaries.