I have lots of (multi)polygons generated with this tool: http://gis.ucla.edu/apps/click2shp/
It provides a zip with dbf, shp, shx, prj files. The prj file contains the following:
Which is EPSG:4326 as I understand.
Polygons are loaded to the Postgres + PostGIS database using some third party library (unknown to me). And it is accessible as WKB or WKT using SQL.
The polygons are spread all over the world - USA, Australia, Europe, potentially anywhere.
What I need is the projected coordinate system for each of these polygons to calculate their areas.
So far I've tried exploring
that allows me to identify the CRS using some point or bounding box.
But maybe there's a better (preferably automated) solution.