GIS
•Automatic mapping
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•HUC – Hydrologic Unit Codes (Level 8)
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•Points – River Mile, GPS coordinates (zebra mussels)
Eirocheir sinensis
Try to refine the data of not too precise locations such as “found in the state” to reference it to the huc8 level.  Point data is the best for fine analysis. Trying to manage county mapping with huc mapping.