Several minor modifcations have been made to the data as distributed by the NRCS to remove inconsistencies between states and simplify analysis software. The modifications for Alabama are:
In addition, while processing the COMP and LAYER tables at PSU/ESSC, one or more problems or inconsistencies were found which could not be corrected without reference to the original state soils data. These are listed in file known_problems.txt.
In addition to the NRCS metadata for this data set, the NCRS STATSGO Data Users Guide is available for viewing or downloading in either Postscript or Adobe Acrobat format.
The data are in an Albers Equal Area projection, with the following parameters:
Datum NAD27
Units meters
Spheroid Clarke1866
1st standard parallel 29 30 0.000
2nd standard parallel 45 30 0.000
Central meridian -96 0 0.000
Latitude of projection's origin 23 0 0.000
False easting (meters) 0.0
False northing (meters) 0.0