Geometry Boost List: [ggl] space partitioning

Subject: [ggl] space partitioning
From: Mateusz Loskot (mateusz)
Date: 2010-09-10 17:44:11

On 17/08/10 18:04, Barend Gehrels wrote:
>> I'd like to implement kd-tree, quadtree/octree/... and regular grid
>> because these are data structures I've been playing with. Is it ok? Or
>> maby should we design one spacial index?
>
> For your information, Federico (the student who built the indexes in
> 2008) did implement a quadtree implementation as well.

I think it is a good idea to take a look at Frederico's work and make
use of it. It would be pity to waste his work.

> It is not yet in
> the extension folder, because I didn't rework the
> conventions/namings/etc, but I can provide it of course. Yes it is good
> to add the things that are available. I just forgot after a while.

By the way, Adam, I'd suggest you to take a look at

http://trac.osgeo.org/ggl/wiki/Developer/Guidelines

(please, use spaces, not tabs :-))

> I think it would be good if there is one library "interface" (Concept)
> with some different implementations. However, the r-tree implementation
> which is currently there does not follow this.

Barend, I thoroughly agree with you here.

>> Btw, do you plan to have some generic linear algebra in the library?
>
> There is some which might be given that name, but note that there is (at
> least one) another library being developed within Boost. That is a very
> promising one and I hope it is reviewed soon.
> 
> http://www.revergestudios.com/boost-la/
> 
> As soon as that is sure, we might use that library for our vector/matrix
> calculations (also instead of the uBlas we're currently using).

Yes, the original plan was to keep using uBlas.
Once the Boost.LA is approved, we can switch.

Best regards,
-- 
Mateusz Loskot, http://mateusz.loskot.net
Charter Member of OSGeo, http://osgeo.org