Re: [Geotools-gt2-users] Interpolating from contour lines

[andrea a. <and...@gm...>]

Hi Michael,

> Another good link which I should have mentioned before is the
> JGrassTools project which is run by one of the GeoTools developers. It
> includes a kriging algorithm written to use GeoTools classes:
>
> http://code.google.com/p/jgrasstools/source/browse/hortonmachine/src/main/java/org/jgrasstools/hortonmachine/modules/statistics/kriging/Kriging.java
>
> I'm cc-ing this message to the author who is a font of wisdom on all
> things to do with landscape modelling.

lol, that was a good one. Where should I make the downpayment? :)

>
> A post about the approach you end up using would be much appreciated - thanks.

I would not use the Kriging for lanscape interpolation.
Some time ago I started to port the Interpolation methods created by
Jan Jezek (Thin Plate Spline and IWD) to jgrasstools by adding in it
quadtree support. They are working quite well, but I stopped in the
middle of the testing phase and never touched them again.
In fact I promised Jan I would get back to him like 3 months ago
(sorry Jan, work drawned me), since I wanted to should him how great
his work would look like in OMS :)
I would use those, if I had to choose. In that case right now you
would need to extract the points from the lines and give them an
elevation attribute. You would also pass a gridgeometry and it would
interpolate in the grid points.
Tada!
Well, you noticed: would, would, would.
I am currently promising a lot of stuff around, so I will go on. I
could bring those tools in official experimental jgrasstools land if
Jan agrees and nobody blames me. :)

Cheers,
Andrea




>
> Michael
>