[postgis-users] ST_Intersection does not preserve M value

Darafei "Komяpa" Praliaskouski me at komzpa.net
Mon May 6 04:47:32 PDT 2019


GEOS operations do not preserve M, but sometimes preserve Z. You can try
ST_SwapOrdinates(ST_Intersection(ST_SwapOrdinates(geom, 'zm'),...), 'zm').

On Thu, May 2, 2019 at 5:19 AM Bo Guo <bo.guo at gisticinc.com> wrote:

> Hi there,
> I was trying to cut a portion of the LRS route with an area using
> ST_Intersection.  However the resulting route no longer carries measure
> value.  The behavior is the same for version 9.6 or the latest version
> 11.  Anyone has any suggestions?
> Thanks!
> Bo
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Darafei Praliaskouski
Support me: http://patreon.com/komzpa
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