Arkansas Spatial Analysis Project (SAP) Products
Methodology
Arkansas participated in the Southern Forest Land Assessment (SFLA) cooperative
project sponsored by the Southern Group of State Foresters. The development of the
project is explained in the information forwarded by the project lead from the State of
Texas. The SFLA project generated raster analysis for Arkansas using a weighted
algorithm from importance assigned by the Arkansas Forestry Commission staff prior to
completion of the project. There was no input from the Arkansas Stewardship
Coordinating Committee in developing the statewide assessment. The analysis rasters
shown in the SFLA document are the exact analysis rasters used in the SAP analysis.
The layers and mean layer weight in the SFLA analysis for Arkansas are shown at the
bottom of each map. For the Stewardship Plans written in federal fiscal year 2009, all
boundary polygons were drawn using heads up digitizing on ArcMap 9.2 or from a
Arkansas County Assessor parcel layer. The Certified Stewardship Plans prior to 2008
were derived from the Arkansas Forestry Commission Accomplishment Report
(AFCAR) database points, buffered according to acreage, and merged with the
appropriate 2008 Stewardship Plan polygons. The database stores locations as Latitude
and Longitude. These were converted to points. The points were represented as circles
proportionally according to the acreage listed in the database for the plan. Hawths tools
were used to buffer the points to the correct polygon acreage.
Map 1 was made using the SFLA raster layer named p_uwp_3c_s and tabular
information directly from SFLA document table A-23 for Arkansas.
Map 2 was made using the SFLA raster layer named p_uwp_3c_s and tabular
information directly from SFLA document table A-23 for Arkansas. Points for the FY 09
Stewardship and FY 05 to FY 08 Certified Stewardship were taken from the AFCAR
database. The high, medium, and low acreages for each polygon were calculated using
the Spatial Analyst Raster Calculator tool to count the number of pixels inside each
polygon. The count was converted to acres using the pixel acreage.
Map 3 was made using the SFLA raster layer named p_uwp_3c_s and named Forestland.
The Acres Capable of Stewardship was taken directly from the table A-23 in the SFLA
Final Report. Forestland and p_uwp_3c_s were added together with the Raster
Calculator to find the potential forested stewardship areas. Points for the FY 09
Stewardship and FY 05 to FY 08 Certified Stewardship were taken from the AFCAR
database. The high, medium, and low acreages for each polygon were calculated using
the Spatial Analyst Raster Calculator tool to count the number of pixels inside each
polygon. The count was converted to acres using the pixel acreage.
Map 4 was made using the SFLA raster layer named r_uwp_3c_s.
Map 5 was made using the SFLA raster layer named t_uwp_3c_s.
Map 6 was made using the SFLA raster layer named p_uwp_3c_s and named Forestland.
The Acres Capable of Stewardship was taken directly from the table A-23 in the SFLA
Final Report. Forestland and p_uwp_3c_s were added together with the Raster
Calculator to find the potential Non-forested-Non-developed stewardship areas. Points
for the FY 09 Stewardship and FY 05 to FY 08 Certified Stewardship were taken from
the AFCAR database. The high, medium, and low acreages for each polygon were
calculated using the Spatial Analyst Raster Calculator tool to count the number of pixels
inside each polygon. The count was converted to acres using the pixel acreage.
Map 7 was made using the SFLA raster layer named p_uwp_3c_s. The FY 09
Stewardship polygons and FY 05 to FY08 Certified Stewardship polygons are depicted
for Union County.