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

[Diego J. <die...@gm...>]

Thanks for your reply.

Sorry, you're right I should have provided more information.

The contour lines are MultiLineStrings. For the output raster I would need
proper interpolation. I guess I'll have to implement it myself then, or use
one of the solutions in the link you gave me.

I'll post here my solution.

2011/10/13 Michael Bedward <mic...@gm...>

> On 13 October 2011 01:29, Diego Jesus <die...@gm...> wrote:
> > Hello,
> > I have a set of contour lines with elevation data from which I want to
> > extract a greyscale heightmap. I've been searching for a couple of hours
> and
> > I haven't found anything...
>
> Ah grasshopper ! A couple of hours is merely the blink of an eye on
> the cosmic timescale of the average open source programming task...
>
> You need to provide more information so that people here can help you.
> On the input side: are your contour lines either LineString objects
> are something that can be turned into LineStrings ?  On the output
> side: were you wanting proper interpolation of values between contours
> for the output raster or would simple filling the regions between
> contours with a uniform value be ok ?  For true interpolation you
> would usually use an algorithm such as Kriging which GeoTools does not
> provide.
>
> Also, take a look at this message in the list archives...
>
>
> http://osgeo-org.1803224.n2.nabble.com/How-can-I-convert-mid-mif-map-to-matrix-of-big-cells-with-average-territory-information-tp1943037p1943037.html
>
> While it is not exactly the same use case that you have it might give
> you some ideas or help you get started.
>
> Michael
>