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
19171	unnecessary SRID lookup makes coordinate transform from custom SRS to standard SRS fail	reidpr@…	nobody	"Running the attached script crashes with `django.contrib.gis.gdal.error.SRSException: Unsupported SRS.`. It shouldn't, as the `CoordTransform` object contains complete information for the transformation.

The problem seems to be that the SRID of point `b` is looked up before the transformation, and this lookup fails (as is expected, because it's a custom SRS). But the lookup is not necessary, because the SRID of point `b` is ignored during the transformation (which can be demonstrated by substituting a bogus SRID on `b` before the transformation -- the results are still correct). 

This is Django version 1.4.1 on:
- Fedora 14 with custom-compiled GDAL 1.9.2, GEOS 3.3.5, and PROJ4 4.8.0
- Debian Wheezy with GDAL 1.9.0, GEOS 3.3.3, and PROJ4 4.7.0 that came with the OS.
"	Bug	closed	GIS	1.4	Normal	fixed	coordinate transformation		Accepted	1	0	0	0	0	0