[postgis-devel] New function ST_MinimumDiameter() ?

[Stefan Keller]

Hallo Niklas

It's really the Oriented Bounding Box (OBB) I'm after.
I'd like to label e.g. buildings or lakes alongside their longest extension.

-S.


2015-02-08 22:12 GMT+01:00 Nicklas Avén <nicklas.aven at jordogskog.no>:
> Hallo Stefan
>
> Isn't MinimumBOundingCircle usable?
> http://postgis.net/docs/manual-dev/ST_MinimumBoundingCircle.html
> I guess that comes from the same function in Geos.
>
> From that you can get the diameter by just use
> ST_XMax(circle)-ST_XMin(circle)
>
> Or do I misunderstand?
>
> /Nicklas
>
>
> On Sun, 2015-02-08 at 20:44 +0100, Stefan Keller wrote:
>> Hi Regina and Paul
>>
>> I'd like to use function ST_MinimumDiameter() in PostGIS which
>> obviously is not yet ported from GEOS.
>> Are there potentially other nice functions like this, which could be
>> made available in PostGIS?
>> Should I try to make a list?
>>
>> Yours, S.
>>
>> 2015-02-06 21:34 GMT+01:00 Stefan Keller <sfkeller at gmail.com>:
>> > Hi,
>> >
>> > While asking about how to calculate the Oriented Bounding Box (OBB) of
>> > a polygon or point set [1] I realized that there exists a function
>> > MinimumDiameter() in GEOS [2].
>> > Now, I'm wondering how to integrate this into PostGIS.
>> > Unfortunately I'm not a C programmer and i don't how to the process
>> > goes for new features in PostGIS.
>> > Can somebody help?
>> >
>> > Yours, S.
>> >
>> > [1] http://gis.stackexchange.com/questions/133327/how-to-calculate-the-oriented-bounding-box-obb-of-a-polygon-or-point-set
>> > [2] http://geos.refractions.net/ro/doxygen_docs/html/classgeos_1_1algorithm_1_1MinimumDiameter.html
>> _______________________________________________
>> postgis-devel mailing list
>> postgis-devel at lists.osgeo.org
>> http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-devel
>>
>
>
> _______________________________________________
> postgis-devel mailing list
> postgis-devel at lists.osgeo.org
> http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-devel