I was trying to create a legend file for a vector file and ran into a problem that others must have encountered before. Hopefully someone can offer a solution.
My vector contour map has negative numbers. That is, it measures depth below surface (not unusual for archaeologists). However, -1 in a legend file has a special meaning of 'all the rest of the lines'. In fact, it seems that it is treating all my negative numbers in that way.
How can I use a legend file to specify colors of vectors with negative attributes? Or is this impossible?
Thanks
Michael Barton
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C. Michael Barton, Professor
Department of Anthropology
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Arizona State University
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On Fri, Nov 21, 2003 at 10:25:40AM +0100, Michael Barton wrote:
My vector contour map has negative numbers. That is, it measures depth
below surface (not unusual for archaeologists). However, -1 in a legend
file has a special meaning of 'all the rest of the lines'. In fact, it
seems that it is treating all my negative numbers in that way.
How can I use a legend file to specify colors of vectors with negative
attributes? Or is this impossible?
I have not given a look to the code so I suggest only a "trick": map
negative attributes to positive ones ( for example "shifting" the
0 comparison plan to, say, 65536, translate att -> 65536 + att).
--
Thierry Laronde (Alceste) <tlaronde@polynum.org>
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