[postgis-devel] ST_DimensionRange() ?

Sandro Santilli strk at keybit.net
Wed May 27 09:49:02 PDT 2015

No comments on this ?
While filing a new enhancement ticket for it I found myself
writing "ST_BoundingLine", would you prefer that as a name ?


On Tue, May 26, 2015 at 05:24:54PM +0200, Sandro Santilli wrote:
> I was looking for the minimum and maximum M values in a geometry and
> to my surprise found NO FUNCTION to do that :'(
> So I'm back deep into my BOX nightmare:
> we don't have a BOX containing the M value !
> My current most useful proposal about this is to use a LINESTRING
> as a general mean to represent dimensional ranges:
> https://lists.osgeo.org/pipermail/postgis-devel/2015-February/024780.html
> Could it be time, for 2.2.0, to give that vision a body and provide
> an ST_DimensionRange(geometry) function returning such a linestring ?
> The returned linestring will have the same dimensions as the input
> geometry and either 0 (for empty input) or 2 points representing minimum
> (ST_StartPoint) and maximum (ST_EndPoint) dimension values.
> Do you like the idea ?
> Would you like to suggest a better name ?
> --strk;

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