Slice percentages
To classify the slope map in percentages, create a new domain, using the menu option “File” > “Create” > “Domain” from the ILWIS main window. Enter a name for this domain, e.g. “slope_pct”, ensure the type is “Class”, and also enable the option “Group”. The classes 0‐10%, 10‐ 25%, 25‐50%, 50‐100%, >100% for the slope map in percentages can be defined, by inserting several domain items in the “Domain Class” editor. The last class should have as upper limit the highest possible map value! Note that also a Representation with the same name is created. Double clicking the Representation shows the colours, these can be modified according to your requirements. When the domain is ready, it can be used to classify the “slopepct” map.
In order to slice the slope map, from the main ILWIS menu, select the
option “Operations” > “Image Processing” > “Slicing”, as Raster map select “slopepct”, as domain “slope_pct” and as output raster map specify “slopepct_cl” and press “Show”.
see also : Slicing