[OSM-dev] Area calculation without transformation

[Florian Lohoff]

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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