RMMC during the quarter submitted a request to Ron Matheny, EPA, to obtain an account on EPA's CRAY supercomputer. EPA approval of RMMC's CRAY account request is pending. The RMMC CRAY account would be used to execute the upcoming SLEUTH 3.0 parallel processor software release (formerly referred to as the Deltatron land cover model).

Jonathan Fernandez and Mark Feller created full-resolution Albuquerque GIF images for executing the SLEUTH 2.1 version. The Albuquerque SLEUTH input images (i.e., urban area, roads, slope, excluded lands, and shaded relief) created were 1873 by 1547 arrays with a 30-meter cell size. A SLEUTH 2.1 coarse calibration using 1/8^th resolution Albuquerque data inputs (234 X 193 array) was completed during the quarter by Mark Feller. The Albuquerque coarse calibration process (i.e., 1935-1991) required 3,125 iterations and took approximately 217 hours CPU time to execute on a 32-bit 200 Mhz quad-processor Silicon Graphics UNIX platform with 0.5 gigabytes of memory. During the coarse calibration process, a script captured Albuquerque temporal land surface characterization metrics such as number of urban clusters, number of urban edges, number of urbanized pixels, and urban area center. After completion of the Albuquerque coarse calibration process, RMMC executed a 2050 future forecast using the full-resolution GIF images. The Albuquerque 2050 urban area prediction (i.e., 1991-2050) required 100 Monte Carlo iterations and ran for approximately 71 hours on the SGI server.

Mark Feller completed SLEUTH 2.1 coarse, fine, and final calibration processes for the Isleta Case Study using 1/16^th image inputs (87 X 72 array). A present (contemporary) forecast and 2050 urban area and LULC forecast for the Isleta 1:24,000-scale quad were modeled using the 1/16^th resolution images. RMMC also executed SLEUTH 2.1 coarse and fine calibration processes respectively using the Isleta 1/16^th (87 X 72) and 1/8^th (175 X 145) images. RMMC populated an Urban Growth Modeling Work Group spreadsheet documenting growth control coefficient values for each SLEUTH 2.1 model execution as well as created line graphs of the coefficients and calibration metrics extracted from the avg.log files for each process.

RMMC has noticed that using the SLEUTH HALFGIF utility does not maintain transportation feature continuity when the array size drops below 1000 X 1000 pixels. Consequently, RMMC plans to use ARC/INFO's LINEGRID command to create one-half resolution road GIF images for comparison with the HALFGIF utility. During Albuquerque slope derivation, percent slope values generated exceeded the maximum allowable RGB value of 255. As a result, the GIF image created was a 16-bit image with only two RGB values instead of the 8-bit GIF image with RGB values ranging from 0 to 255 as required by the SLEUTH model. In order to resolve the slope input discrepancy, RMMC remapped all Albuquerque percent slope values above 255 to an unused RGB value below 255. In order to research Isleta 1991 and 2050 urban area spatial discrepancies, Dave Hester provided Jeannette Candau, UCSB, with the original Isleta GIF images and ARC/INFO GRID datasets. Investigations by UCSB identified that RMMC was using a different SLEUTH future forecast GIF image registration process than UCSB and that the spatial discrepancy was not related to the SLEUTH source code.