Hi, Friends, I am a little bit confused.
If I use geometry as data type, do I put something like 5 metres and use_spheroid=false? Is that correct? Regards, Shao On Fri, 15 May 2020 at 13:00, Giuseppe Broccolo <[email protected]> wrote: > Hi Shao, > > Il giorno ven 15 mag 2020 alle ore 11:56 Shaozhong SHI < > [email protected]> ha scritto: > >> Hi, Nicolas, >> >> Thanks. >> >> That is very interesting. I will test it. >> >> I could not find information on how distance is defined. 0.01 stands on >> what unit? >> >> https://postgis.net/docs/ST_DWithin.html >> > > Have a look to this statement in the doc you linked: > > """ > For geometry: The distance is specified in units defined by the spatial > reference system of the geometries. For this function to make sense, the > source geometries must both be of the same coordinate projection, having > the same SRID. > > For geography units are in meters and measurement is defaulted to > use_spheroid=true, for faster check, use_spheroid=false to measure along > sphere. > """ > > Giuseppe. > > _______________________________________________ > postgis-users mailing list > [email protected] > https://lists.osgeo.org/mailman/listinfo/postgis-users
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