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
5779	If the layer.srs does not have a srid it should return None	tlp	jbronn	"If a srs of a layer does not have a srid it should return None instead of throwing a Type Error.

I am using this dataset: http://www.eng.hctx.net/gis/Shapefiles/ZIP CODE.zip

{{{
>>> from django.contrib.gis.gdal import DataSource
>>> ds = DataSource(""/home/osc/data/zipcode/zipcodep.shp"")
>>> layer = ds[0]

In [40]: layer.srs.srid
---------------------------------------------------------------------------
<type 'exceptions.TypeError'>             Traceback (most recent call last)

/home/geo/geo/<ipython console> in <module>()

/home/geo/local/lib/python2.5/site-packages/django/contrib/gis/gdal/srs.py in srid(self)
    206         """"""
    207         try:
--> 208             return int(self.attr_value('AUTHORITY', 1))
    209         except ValueError:
    210             return None

<type 'exceptions.TypeError'>: int() argument must be a string or a number, not 'NoneType'
}}}
"		closed	GIS	gis		fixed			Accepted	0	0	0	0	0	0