Date: January 13, 2011
Subject: SOI – Correcting Errors
in SSURGO Spatial Data Sets
Purpose: To provide field offices guidance on how to
handle errors in the SSURGO Spatial Data sets.
Effective Date: January 13, 2011
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 to follow in the event an
error is found in the soils spatial data.
When errors are noted, 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 resource soil scientist in the survey area. 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 maintained on file in
the field office.
There will be no fixed schedule for posting corrections to the Soil Data
Warehouse and to the Web Soil Survey. It will be at the discretion of the State
Soil Scientist, based on the severity of errors and workload requirements.
If there are questions, please direct them to
Charles Love, State Soil Scientist/MO-15 Leader, (334) 887-4517 or
Scott Anderson, Soil Data Quality
Specialist, (334) 887-4565.
WILLIAM E. PUCKETT