Dear group,
Here is one beginner question, and although I found some similar
problems and answers, I cannot resolve my particular issue. I have
just started to use IDL (IDL Core Version 7.1, IDL) and I fail to
produce a simple surface graph with custom made palette.
I would like to visualize elevation data with iSurface tool using
following vector for levels
levels =
[-1000,1,25,50,100,150,250,350,500,750,1000,1250,1500,1750,2 000,2500,3000]
i.e. values lower than 1 with light blue color, then green for values
between 1-25, and so on continuing with yellow, brown, up to value
3000, and white for values above. Below is the code which I am trying
to use for that purpose, but it seems that I am missing something.
pro topo3d
device, decom=0
rgb_table = bindgen(256,3)
rgb_table[0:17,0]=
[000,140,000,040,080,120,160,200,255,230,200,170,145,120,090 ,135,180,255]
rgb_table[0:17,1]=
[000,140,100,125,150,175,200,225,255,220,180,150,110,075,040 ,110,180,255]
rgb_table[0:17,2]=
[000,255,000,000,000,000,000,000,000,000,000,000,000,000,000 ,090,180,255]
levels =
[-1000,1,25,50,100,150,250,350,500,750,1000,1250,1500,1750,2 000,2500,3000]
data = hanning(200,200)*3000
isurface, data, RGB_TABLE=rgb_table,texture_image=bytscl(data),
vert_colors=levels
end
Could you please be so kind and provide me some hints how to produce
figure with surface using custom palette for various levels?
Kind regards,
Goran
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