This electronic report was subjected to the same review standard that applies to all U.S. Geological Survey reports. Reviewers were asked to check the topological consistency, tolerances, attribute frequencies and statistics, projection, and geographic extent. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. This data set consists of wells with water-level data that were in GWSI in June 1998. Potentiometric surface of the Madison aquifer in the Black Hills area, South Dakota.
Point features present.
This data set consists of well locations for the Madison aquifer in the vicinity of the Black Hills, South Dakota. 4.The locations and attributes were verified. Wells were eliminated from the list if no measurement of static water level was available. User-assigned feature identity number. This is a unique number given to each well.