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Spatial Analyst Tools AG92 Version 5.6

Spatial Analyst Tools AG92 Version 5.6

Updated Sep 24, 2009

If you encounter problems with the file provided on this page, please contact Soil Survey at 406-587-6818.

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Printable Version: Spatial Analyst Toolbox Information (PDF; 22 KB)

Note: For this Toolbox to function properly, it must be placed in this directory: C:\arcgis\arcexe9x\Toolboxes.

1. Relative Effective Annual Precipitation (REAP) Toolset

Models in this toolset are used to create a raster for REAP. DEM, Aspect, Slope, and Precipitation rasters must be created prior to running the REAP Model.

For the REAP models to function properly, use the following directory structure:

• C:\WorkSpace\spatial\tmp
• C:\WorkSpace\spatial\aspect
• C:\WorkSpace\spatial\slope
• C:\WorkSpace\spatial\reap

To create a REAP layer, an “actual” precipitation raster (values in centimeters) is used. Two choices are available—DAYMET data is in centimeters and can be prepared for each soils office by the State Soils Staff. If PRISM data is used, it should be converted to a raster and the units converted from inches to centimeters.

The outputs from the REAP Model consist of two rasters—“reap_factor” and “reap_final.” Based on aspect and slope, the “reap_factor” raster displays reductions and additions to actual precipitation for any given area (values are in centimeters). The “reap_final” raster is the adjusted precipitation layer (in centimeters) based on actual precipitation, aspect, and slope.

Note: To re-run the REAP Model, delete previous layers, such as the "reap_factor" and the "reap_final" rasters. The user can use the Delete Raster Model found in the REAP Toolset.

2a. Temp. Regimes (2 Climatic zones on 4 Aspects - N, E, S, W)

Toolset 2a is used to create a raster that separates cryic and frigid temperature zones on north, east, south, and west aspects. If Toolset 2a is used, then Toolset 3a should be used to create temperature-moisture rasters.

Temperature modeling is based on aspect, elevation, and slope. Required inputs are DEM, Slope, and Aspect rasters. For a specific aspect, the user enters the minimal elevation value for cryic zones (e.g., 1,800 meters on east aspects).

For the models to function properly, use the following directory structure:

• C:\WorkSpace\spatial\tmp
• C:\WorkSpace\spatial\temp_reg

Note: If a user would like to re-use an existing raster file name or delete a raster that is no longer needed, then Model 1 can be used. If Aspect and Slope rasters do not exist, then Models 2 and 3 should be run. However, Aspect and Slope rasters created in the REAP Toolset can be used for required inputs in this Toolset. Models 4 through 9 should be run sequentially.

2b. Temp. Regimes-FFD (7 Climatic zones on 2 Aspects - N, S)

Toolset 2b is used to create rasters that intersect cryic/frigid temperature zones and frost-free days with north and south aspects. If Toolset 2b is used, then Toolset 3b should be used to create temperature-moisture rasters.

Temperature and frost-free day modeling are based on aspect, elevation, and slope. Required inputs are DEM, Slope, and Aspect rasters. For a climatic zone on a specific aspect, the user enters the minimal elevation value for this zone (e.g., 1,000 meters on north aspects that have a frost-free range from 90 to 110 days).

For the models to function properly, use the following directory structure:

• C:\WorkSpace\spatial\tmp
• C:\WorkSpace\spatial\temp_reg

Note: If a user would like to re-use an existing raster file name or delete a raster that is no longer needed, then Model 1 can be used. If Aspect and Slope rasters do not exist, then Models 2 and 3 should be run. However, Aspect and Slope rasters created in the REAP Toolset can be used for required inputs in this Toolset. Models 4 through 7 should be run sequentially.

3a. Temp-Moisture (used with Toolset 2a)

Models in this toolset are used to create climatic rasters that intersect two temperature zones (cryic or frigid) and six moisture zones. Inputs include a “cryic-frigid” raster created in Toolset 2a and a REAP raster. Users have the option of accepting the default precipitation values for a particular moisture regime (e.g., the default values for an “ustic” moisture zone are 37 to 49 cm) or alternate values can be entered.

For the models to function properly, use the following directory structure:

• C:\WorkSpace\spatial\moisture-temp
• C:\WorkSpace\spatial\moisture-temp\shapefile

3b. Temp-Moisture (used with Toolset 2b)

Models in this toolset are used to create climatic rasters that intersect two temperature zones (cryic or frigid), seven different frost-free day ranges (i.e., 90 to 110 frost-free days), and six moisture zones. Inputs include a “cryic-frigid” raster created in Toolset 2b and a REAP raster. Users have the option of accepting the default precipitation values for a particular moisture regime (e.g., the default values for an “ustic” moisture zone are 37 to 49 cm) or alternate values can be entered.

For the models to function properly, use the following directory structure:

• C:\WorkSpace\spatial\moisture-temp
• C:\WorkSpace\spatial\moisture-temp\shapefile

4. Slope-Curvature Toolset

Models in this toolset use a DEM to create rasters and shapefiles of slope and curvature.

Slope Gradient Models: Layers derived from the Slope Gradient Models provide users with a shapefile and a raster of different slope breaks. The only required input is a DEM. However, the user may choose to either accept the default slope breaks or assign different breaks.

For the models to function properly, use the following directory structure:

• C:\WorkSpace\spatial\tmp
• C:\WorkSpace\spatial\slope
• C:\WorkSpace\spatial\slope\shapefile

Curvature Models: Layers derived from the Curvature Models provide users with a picture of overall slope shape—convex, concave, and linear. This information could be used to separate erosional surfaces from depositional surfaces. The only required input is a DEM.

For the models to function properly, use the following directory structure:

• C:\WorkSpace\spatial\tmp
• C:\WorkSpace\spatial\curvature
• C:\WorkSpace\spatial\curvature\shapefile

5. Aspect Toolset

Models in this toolset use a DEM to create rasters and shapefiles of aspect.

Aspect Models (Northwest (NW), North (N), Northeast (NE), East (E), Southeast (SE), South (S), Southwest (SW), West (W), Neutral): Layers derived from the Aspect Models provide users with a shapefile and a raster of different aspect classes. The user first creates a classed slope raster and an aspect raster. After creating these rasters, the only required inputs are aspect values for NW, N, NE, E, SE, S, SW and W. Default values are provided for each aspect. However, the user may choose to assign different values. Caution should be used if different aspect values are used. For example, if easterly values range from 65 to 110, then northeasterly clockwise values must be set to 65. The southeasterly counterclockwise value must be set to 110.

For the models to function properly, use the following directory structure:

• C:\WorkSpace\spatial\tmp
• C:\WorkSpace\spatial\aspect
• C:\WorkSpace\spatial\aspect\shapefile

6. Map Unit Intersect Toolset

Models in this toolset intersect slope, curvature, or aspect with soil polygon shapefiles. Outputs can be used in an Excel Pivot Table to aggregate map units by slope, curvature, or aspect. Users can then determine acreage, as well as percentages, of various slopes, curvatures, and/or aspects for any given map unit.

Slope-Mapunit Intersect Model: The shapefile derived from the Slope-Mapunit Intersect Model provides users with a layer aggregated by slope and map unit symbol. Required inputs are a slope and map unit polygon shapefile. The user is also required to check the fields for aggregation (e.g., “slope” and “MUSYM”).

For the models to function properly, use the following directory structure:

• C:\WorkSpace\spatial\tmp
• C:\WorkSpace\spatial\slope\shapefile

Curvature-Mapunit Intersect Model: The shapefile derived from the Curvature-Mapunit Intersect Model provides users with a layer aggregated by curvature and map unit symbol. Required inputs are a curvature and map unit polygon shapefile. The user is also required to check the fields for aggregation (e.g., “curvature” and “MUSYM”).

For the models to function properly, use the following directory structure:

• C:\WorkSpace\spatial\tmp
• C:\WorkSpace\spatial\curvature\shapefile

Aspect-Mapunit Intersect Model: The shapefile derived from the Aspect-Mapunit Intersect Model provides users with a layer aggregated by aspect and map unit symbol. Required inputs are an aspect and map unit polygon shapefile. The user is also required to check the fields for aggregation (e.g., “aspect” and “MUSYM”).

For the models to function properly, use the following directory structure:

• C:\WorkSpace\spatial\tmp
• C:\WorkSpace\spatial\aspect\shapefile

7. Elevation Clip Toolset

Models in this toolset can be used to create a raster and/or a shapefile from a specified elevational range.

For this toolset to function properly, use the following directory structure:

• C:\WorkSpace\spatial\tmp
• C:\WorkSpace\spatial\dem
• C:\WorkSpace\spatial\shapefiles