It has been noted that some of the SSURGO spatial data sets contain errors,
such as line placement; delineations with different map unit symbols;
delineations with missing symbols; and delineations of the same map unit sharing
common boundaries. This document defines the procedure for soil scientists to
follow in the event an error is found in the soils spatial data.
When errors are noted by field office staffs, the District Conservationist
(DC) in the survey area is to be notified. The DC is to record the exact
location and nature of the error on either a hard or electronic copy of the
soils layer using the most current or detailed aerial imagery. The name of the
individual who found the error should be noted.
The discrepancy should then be sent by mail or electronically to the
appropriate resource soil scientist. The resource soil scientist will then
forward this information to the state soil scientist. The state soil scientist
will assign the resource soil scientist or the MLRA soil survey office leader to
field check the map unit delineation in question and correct the error. A record
of correction(s) should be kept on file in the Field Office and at the State
Office.
A Problem Copy Geodatabase will be the official repository for errors found
and corrections made to Alabama’s SSURGO spatial data. Problems stored in this
Geodatabase will be reconciled with the official SSURGO data at the discretion
of the State Soil Scientist based on the severity of errors and workload
requirements. There will be no fixed schedule for this update of the SSURGO
spatial data.
Joe Norris, GIS Specialist, is the designated representative of the state
soil scientist responsible for maintaining the Problem Copy Geodatabase. The
State Soil Scientist will forward the records of errors and corrections to the
GIS Specialist.
If there are questions, please direct them to Charles Love, State Soil
Scientist, (334) 887-4517 or Scott Anderson, Soil Data Quality Specialist, (334)
887-4565.
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