[gdal-dev] generate contours with different interval

[brian]

wow,

Fixed levels is what you want. It is a list of levels to contour at.

-fl 0 10 20 30 40 50 60 70 80 90 100 150 200 250 300 350 400 450 500 700
800 and so on.

brian


On Sun, 2009-09-20 at 20:25 +0800, wow wrote:
>                                    
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>                                  Hi,
>                            I want to generate
>                        contours with different
>                          intervals in sevaral
>                         elevation ranges. For
>                            example, if the
>                           elevation range is
>                          (0,100), the contour
>                           interval is 10; if
>                           the range is [100,
>                         500), the interval is
>                        50; and if the range is
>                            [500, 2000), the
>                          interval is 200. Can
>                               all those
>                         contour generation  be
>                         processed in one time.
>                         by gdal_contour? What
>                           should I do if it
>                         cannot? By the way, I
>                        do not know the meaning
>                             of  the "fixed
>                         level" in the process
>                                 of the
>                          contour generation,
>                         would someone give me
>                             some advices? 
>                           ------------------
>                          To the world you're
>                            little, but to a
>                          person, maybe you're
>                               the world.
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> 
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