[postgis-users] Which operators/functions work with circular arcs?

[Andreas Neumann]

Hi Paul,

Thank you for your  reply. Indeed it would be nice to label the 
functions that are safe to use with Circular Arcs. With the soon to be 
announced support for display and editing of circular arcs in QGIS it 
would to keep them as such in Postgis and still use them for 
geoprocessing with SQL.

Regina - would you be available for some contracted work to improve 
tests and documentation around support of circular arcs?

Andreas

On 20.08.2015 19:17, Paul Ramsey wrote:
> They aren't marked, perhaps Regina could garden test them to find them...
> All the simple functions that take apart geometries, etc, work fine.
> The simple measurements (length/perimeter) work fine
> As of 2.2 all the GEOS-backed functions will "work" (by linearizing
> the arcs before sending them in)
> The simplification functions won't work, though as of 2.2 they too
> will linearize first.
> The area calculations don't work.
>
> A comprehensive survey would be most appreciated.
>
> P
>
>
> On Thu, Aug 20, 2015 at 7:30 AM, Andreas Neumann <a.neumann at carto.net> wrote:
>> Hi,
>>
>> I wonder how I can find out what operators and what functions work with
>> circular arcs? Are they marked in the documentation as such?
>>
>> Thank you for your hints!
>>
>> Andreas
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