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United States Department of Agriculture

Agricultural Research Service

Raster Downloads
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Raster files for hot-spots of 43 weeds in Linn County are contained in the ESRI format file geodatabase:

LinnCounty43WeedHotSpots.gdb

The file was created using version 9.3 of ArcCatalog.

The Hot-spot_layer_files directory contains layer files that reference the rasters in the file geodatabase and display the rasters with break points set to Z-scores matching P=0.0001, 0.001, 0.01, 0.05, and 0.1 probability levels.

Dark blue, blue, light blue, dark aqua, and aqua colors denote areas with significantly lower than expected weed severity at the P = 0.0001, 0.001, 0.01, 0.05, and 0.1 levels, respectively. Bright red, red, orange, and orange-yellow, and yellow denote areas with significantly higher than expected weed severity at the P = 0.0001, 0.001, 0.01, 0.05, and 0.1 levels, respectively. Green areas are neither significantly higher nor lower than expected in weed severity. Scale is 1:275,000 if map is printed as a full page.

For layer files to properly reference the rasters, the file geodatabase should be copied to the following directory structure location:

C:\GIS_Server\LinnCounty43WeedHotSpots.gdb

 Links to Raster File Downloads:

Hot-spot_layer_files.ZIP (250 Kb) 

Hot-spot_raster_file_geodatabase.ZIP (350 Mb)


Last Modified: 3/5/2008
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