[geos-devel] EWKB and M component

strk strk at keybit.net
Fri Aug 27 04:05:09 EDT 2010

On Fri, Aug 06, 2010 at 10:29:09AM -0500, Aron Bierbaum wrote:
> We have recently ran across some data that we are trying to load from
> PostGIS that contains a fourth M component. [1] We quickly noticed
> that the GEOS WKBReader does not support a potential M component. Are
> there any plans to improve support for this extra component?

No plans.

> Since we really don't care about this fourth component, and we didn't
> want to attempt to add a fourth component to the Coordinate class, we
> extended the WKBReader to simply strip this extra component. I have
> attached a patch for review.

I suggest you strip the M on the db side.
GEOS's WKBReader is meant to read WKB, not EWKB.


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