"Damian" wrote:
<< I'm looking for a way to calculate the area of certain colours within a
raster file - say, for example, areas of colour-coded districts from a
scanned city map. Then, from this, if possible, I'd like to split the areas
up further using Mapinfo polygons.
There's two ways I can see of getting the area : one would be to count the
number of pixels of a particular colour, and from the resolution, work out
the area that is that colour. The other would be to convert every colour to a
polygon using some sort of edge-detection toolbox, and then work on the
polygon as normal. Does anyone know of any Mapinfo toolboxes available or any
other means to do either of these tasks? >>
Damian (and Roy):
Check out the "Region Extraction Tool" at the URL:
http://members.aol.com/MapTools/
I believe this tool does exactly what you are asking for ...
Robert Edwards
The MapTools Company
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