#30645: GEOSGeometry incorrectly transforms geometry
-------------------------------------+-------------------------------------
Reporter: Yury | Owner: nobody
Ryabov |
Type: Bug | Status: new
Component: GIS | Version: 2.2
Severity: Release | Keywords: SRID, geometry,
blocker | GIS, GEOS
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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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.
--
Ticket URL: <https://code.djangoproject.com/ticket/30645>
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