DOQs from 93 counties were remotely sensed to build that distribution.
Before ground-truthing, the raw layer atop of the DOQs was re-examined, and polygons representing the lowest probability signature were removed.
1) atop the DOQs was reviewed a final time, and polygons representing classes of signature variants that had not yielded BTPDs were removed.
3% more area of colony signatures than on the 1994-97 DOQs.
Reported colonies and historical records were utilized more than direct remote sensing work in the Trans-Pecos more so than in other ecoregions because the arid Trans-Pecos habitat resulted in high reflectance in the DOQs.
For this process, a digital atlas field sheet and its corresponding DOQ were opened into individual IMAGINE viewers.
However, when a first-order polynomial was initially evaluated for our procedure, it was evident that areas in close proximity to the GCPs matched the DOQ fairly well, but areas away from the GCPs were somewhat displaced.
We evaluated the accuracy of each method by comparing the distance between selected features on the DOQ imagery and the same features on the transformed images.
This "image matching technique" is based on the principle of geo-rectifying atlas field sheets to stable DOQ base maps before soil lines are extracted.
Our objective was to develop a computer-based technique that incorporated the use of DOQs to expedite the recompilation and digitization of pre-existing soil survey information into SSURGO products.