[postgis-users] Are there script examples for determine where vertices run clockwise or anti-clockwise?

[Marcin Mionskowski]

Assuming simple polygons, composed from exterior ring only (i.e. no
multipolygons), I think that you are looking for a function
{ST_IsPolygonCW|ST_IsPolygonCCW}.

Greetings,
Marcin

śr., 16 lut 2022 o 19:55 Imre Samu <pella.samu at gmail.com> napisał(a):

> > how vertices run?  clockwise or anti-clockwise?
>
> maybe the:
> https://postgis.net/docs/ST_Angle.html  *"Computes the clockwise angle
> between two vectors."*
> or https://postgis.net/docs/ST_Azimuth.html
>
> regards,
>  Imre
>
>
> Shaozhong SHI <shishaozhong at gmail.com> ezt írta (időpont: 2022. febr.
> 16., Sze, 17:06):
>
>> Can we use PostGIS to find out how vertices run?  clockwise or
>> anti-clockwise?
>>
>> Regards,
>>
>> David
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