The U.S. Geological Survey does not recommend or endorse any particular software package for use with these data sets. COND Complete documentation of the data sources and procedures used to create the hydraulic conductivity data set and links for retrieval of the data set. Complete documentation of the data sources and procedures used to create the ground-water level elevation contour data set and links for retrieval of the data set. This projection is appropriate for maps of the conterminous United States because of the visual presentation and equal-area characteristics, which facilitates areal analysis. The projection is cast on the North American Datum of 1983.
Scale is true along the standard parallels, which are to the north and south of Oklahoma.
Scale distortion in Oklahoma reaches a maximum of slightly less than one percent at the northern border of the state. The following table provides map projection information. File names in this document are enclosed in quotation marks and type set in upper case.