4.2 topoclass.aml

This AML that allows to  classify the integrated grid of topographic position (derived from toposcale.aml) into a grid containing class values only. The AML reads an AscII file, similar to the “remap_table” files used for coloring grids. The reclassification (e.g. topos.rcl, see below at download location) file should be set up as follows:
 -1100 -200 : 4
  -200 -100 : 3
  -100  150 : 2
   150 1100 : 1
where the values  –1100 up to –200 are reclassified as 4 (= valley bottom), the values -200 up to –100 as 3 (=toe slope), the values –100 up to 150 as 2 (-slope), and the values above 150 as 1 (=ridge). All values of the input grid that are not covered by the class thresholds are reclassified as NODATA values.
The user is prompted for the input grid (i.e. the grid resulting from toposcale.aml), for the output grid name, and for the reclassification file (an AscII file as presented above).
 
 
 

General specifications of the AML:

Command: &r  topoclass     (at GRID prompt)
Required input: Toposcale grid
Output units: Grid of topographic classes (ridge, slope, toe slope, …)
Speed of calculations: Very fast due to simple reclassification scheme
Flexibility of the routine: Medium; user can adjust AML at interface
User interface: Limited, but simple and easy
Known errors:  -
Programmer N.E. Zimmermann
Download: topoclass.aml, recl.topos   (an example reclassification file)       (use: "save link as")
Contact: niklaus.zimmermann @ wsl.ch

 
 
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Last Updated: 9/08/00
By Niklaus E. Zimmermann