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 was created under a cooperative agreement with the Oklahoma Department of Transportation. For more information see Tortorelli, Rea, and Asquith, 1999. Precipitation station locations used in the depth-duration frequency analyses were recorded to the nearest 1 minute of latitude and longitude. The contours were derived from surface grids with 2,000-meter grid cell size.
All depths are in inches.
The first major code in the DLG-format file contains depths expressed in hundredths of an inch because the DLG format requires major and minor codes to be integer values. Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials.