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I&M Home << Accuracy Assessment
San Dimas Technology
& Development Center
444 E Bonita Ave
San Dimas, CA 91773
(909) 599-1267
ACAS - ACCURACY ASSESSMENTGeorge Broyles, Forestry Technician
The Rocky
Mountain Research Station (RMRS), Forest Inventory and Monitoring Environmetrics
developed a software system for accuracy assessment of remotely
sensed thematic maps and other GIS themes that include categorical variables
(e.g., forest type maps, habitat quality categories, management action suitability).
ACAS, standing for Accuracy Assessment was developed
for Linux, a UNIX-like public domain operating
system (OS) prior. Work under this T&D project was to make the existing
application written in C++ and TCL/TK
available through the FS intranet. There exists both a design language for scripting
the analysis, and a data language for providing input to drive it. Outputs
from the current program are contingency tables of conditional and unconditional
probabilities, statistics, bar charts, and stacked bar charts. The
program was built to accommodate 2 classes of users: those who develop analysis
models, and those who will use the models to develop assessments
Working with Rocky Mountian Research Station, Remote Sensing Application Center, and San Dimas T&DC, ACAS was re-compiled to run on a current Linux kernel. Tests were done to evaluate the effectiveness of accessing ACAS across the web. Software documentation and user instructions are being developed. When this doucumentation is complete, instructions for accessing ACAS through the web will be available for beta testers. Users will be able to upload data from their PC to ACAS and then download the reports. Providing ACAS via the web will provide for easier maintainenace and software upgrades in the future.