[OSM-dev] Area calculation without transformation

[Yves]

Geos? 

Le 24 mars 2024 15:44:24 GMT+01:00, Florian Lohoff <f at zz.de> a écrit :
>
>Hi,
>
>I am looking into performance issued with QA code of mine and i am at one
>point i calculate the osm objects area.
>
>I am using libosmium and gdal/OGR right now.
>
>Now - to get a m² based area i am transforming into an planar EPSG
>which seems to be the bottleneck of processing.
>
>I now had a quick look at postgis'es lwgeom code for ST_Area using
>a spheroid which my guess is much faster as i am on the very same spheroid
>all the time.
>
>Does anyone know of a c++ implementation nicely plugging into
>libosmium/gdal/ogr processing just using the EPSG:4326?
>
>Flo
>-- 
>Florian Lohoff                                                     f at zz.de
>  Any sufficiently advanced technology is indistinguishable from magic.
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