[geos-devel] Support for M values

Sandro Santilli strk at keybit.net
Thu Mar 26 05:35:13 PDT 2015

On Thu, Mar 26, 2015 at 01:23:14PM +0100, Sandro Mani wrote:
> Hello,
> AFAICS geos does not support M values in coordinates. Is this
> correct? (I see a CoordinateSequence::M in
> enum { X,Y,Z,M };
> but it never appears to be used)
> If indeed currently completely unsupported, would a patch to
> introduce support be accepted?

I confirm it's currently completely unsupported.

The problem of supporting M is that even 2D geometries will
grow by 1/4 of each Coordinate, which is a concrete (non-virtual)
class. I've no idea how would a virtual Coordinate affect performances,
it would need to be tested.


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