The values are included in the attribute tables. The set of 84 interpolated DDF surfaces and contours derived from each surface are being published with these data sets. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Original precipitation-station locations were recorded to the nearest one minute of latitude and longitude. This data set was created under a cooperative agreement with the Oklahoma Department of Transportation.
Point features present.
All data from the questionable year was removed from the data base for these cases. Records from those stations were removed from the data base. Removal of data from some years or stations did not greatly reduce the amount of precipitation data available from within and near Oklahoma. For example, occasionally an existing station is relocated to a nearby site, and new stations might be established near an existing station. If the distance between two stations is small, then the data were assumed equivalent and combined into a single data set.