[GRASS-user] check pixel by pixel

[benjamin.ducke at ufg.uni-kiel.de]

The GIS raster data model states that each cell contains
one and exactly one value.
That's why raster maps are also called "fields" in spatial
statistics. And it is why raster operations are so simple
and efficient.

ESRI ArcGIS 9.2 (not GRASS) has raster maps with multiple
attribute values attached to each cell -- but that's a
perversion of the entire concept in my opinion.

I am sure there must be a way of dividing your problem into smaller
steps such that you will be able to solve it with the standard
raster model.

> Hi,
> I have several raster maps (aspect, slope, tand_curv etc.). I would like
> to combine these raster maps to one raster but without losing any
> information. As a result i would like to have one raster map with several
> attributes (aspect, slope, tang_curv etc.). And then I would like to check
> Pixel by Pixel
>
> if slope = steep and aspect = North etc.
> then
> "Value of the checked pixel" + 10
>
> else
>
> ....
>
> Has anybody done this before? Is it possible to combine several raster
> maps without losing any information?
>
> Greets
>
> Andreas
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