<< Click to Display Table of Contents >> Navigation:  Help Content > General Tools > Data Transformation > General Tools - Data Transformation - Conversion DEM to Slope and Aspect

Purpose

 

Starting from an input Digital Elevation Model (in SARscape format), two different outputs are generated:

•The slope (in degrees) along the Easting and Northing direction

•The Aspect, a layer that identifies the downslope direction of the maximum rate of change in value from each cell to its neighbors.

 

Technical Note

None.  

 

Input Files

 

DEM File

Input Digital elevation Model (_dem). This file is mandatory.

 

Parameters - Principal Parameters

 

Window Size

Size of the window used to compute the Slope and aspect layer. Larger window are used with high resolution DEM to get a SLope/Aspect layer.

 

Output Files

 

Output file

Output file name of the slope image. This file is mandatory.

 

_aspect

Aspect layer which identifies the downslope direction of the maximum rate of change in value from each cell to its neighbors. The values of each cell in the output raster indicate the compass direction of the surface faces at that location. It is measured clockwise in degrees from 0 (due north) to 360 (again due north), coming full circle. Flat areas having no downslope direction are given a value of -1.

 

_meta

A meta (_meta) file is generated to load at once all relevant output products.

 

_W2E_slope

Easting direction slope image and associated header files (.sml, .hdr).

 

_S2N_slope

Northing direction slope image and associated header files (.sml, .hdr).

 

_slope

Combined slope image and associated header files (.sml, .hdr).

 

Details specific to the Units of Measure and Nomenclature of the output products can be found in the Data Format section.

 

General Functions

 

Exec

The processing step is executed.

 

Store Batch        

The processing step is stored in the batch list. The Batch Browser button allows to load the batch processing list.

 

Close        

The window will be closed.

 

Help

Specific help document section.

 

 

Specific Function(s)

 

None.

 

See Also

 

Task, SARscapeBatch object, SARscapeBatch script example

 

References

 

None.