[Gvsig_english] Creating density raster/isolines out of point layer

[davk]

Hi, 

thanks so much, i don't want getting on your nerves but perhaps you could
help me with a last question.
It is true, that converting the raster map into polygons is some kind of
uncomfortable. I didn't know the option with the pixel transperency until
now which is perfectly suitable for my problem. If I create the kernel
density map, the map is in HIS (i think), not in RGB. pixel transparency
seems only wo work with RGB. so I can convert the HIS raster into three
channels R, G, B with S EXTANTE. But how can I put them together correctly,
so that the image is looking as the HIS before? The format is always .tif.
Can I do this with gvSIG or must I use another program?

im really sorry for all those questions, thanks & greetings davk


Benjamin Ducke wrote:
> 
> 
>> ite this probably. If I want my
>> PC to do this anyhow, it isn't even really starting calculating. But with
>> the sample data it worked, and created 1 Cell / 50m². Do you have any
>> idea
>> how I could manage this?
> 
> Have you tried saving the result straight into a raster file instead of
> a temporary layer?
> 
>> raster map, I have to work with transperency, because even the areas
>> wie minimal density would be shown, no? 
> 
> You can use per-pixel transparency to make the areas of lowest density
> transparent.
> 
>> So is it possible to convert the density
>> raster map into polylines first, then delete the polylines which I'm
>> not interested in beeing shown(the minimal density "white space"), and
>> then convert the remaining isolines into polygones and filling it with
>> colors equivalent to their density value. This is sounding very complex,
>> i
>> know.
>> But can I realize it by combining some tools from S EXTANTE?
>> Anyway thanks a lot for your answer Benjamin.
> 
> Generate contour lines for the densities you are interested in, then
> convert them to polygons (may take some manual editing).
> 
> Ben 
> 
>> 
>> greetings davk
>> 
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