id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
30645	GEOSGeometry incorrectly transforms geometry.	Yury Ryabov	nobody	"Lets demonstrate the bug with a point geometry in WGS84 `Point(37 51)`.

Here is the plain-sql example of how PostGIS transforms a single point:


{{{
SELECT ST_Transform(ST_GeomFromEWKT('SRID=4326;Point(37 51)'), 3857) AS result
--------------------------------------------
result                                     |
-------------------------------------------|
POINT (4118821.159351122 6621293.722740169)|
}}}

Lets try to do the same with GEOSGeometry:


{{{
>>> from django.contrib.gis.geos import GEOSGeometry
>>> GEOSGeometry('srid=4326;Point(37 51)').transform(3857, clone=True).ewkt
'SRID=3857;POINT (5677294.030456952 4439106.787250583)'
}}}

The result is quite different. 

Not sure if this bug belongs to Django or GEOS or it is something wrong with my setup. GEOS version is 3.7.2.
"	Bug	closed	GIS	dev	Normal	worksforme	SRID, geometry, GIS, GEOS	Sergey Fedoseev	Unreviewed	0	0	0	0	0	0