rotpole projection to ESRI shape file

Hi:

Does anyone know how to convert rotpole projection to ESRI format, to write data into a shape file?

I tried to do it using basemap.proj4string, and then pycrs or gdal, but there are some things missing from the proj4string...

I've added +ellps, but +o_proj=longlat +proj=ob_tran do not seem to be recognized...

Here is the proj4 I am trying to use:

+R=6370997.0 +lon_0=-97.0 +o_lat_p=42.5 +units=m +proj=ob_tran +o_lon_p=180.0 +o_proj=longlat +ellps=WGS84

pycrs complains that it does not know the specified name:

```
Traceback (most recent call last):
File "/Users/huziy/skynet2/RESCUE/skynet3_rech1/huziy/Netbeans Projects/Python/RPN/src/crcm5/mh_domains/show_domain_with_drainage_area.py", line 213, in
main()
File "/Users/huziy/skynet2/RESCUE/skynet3_rech1/huziy/Netbeans Projects/Python/RPN/src/application_properties.py", line 15, in wrapper
func(*args, **kwargs)
File "/Users/huziy/skynet2/RESCUE/skynet3_rech1/huziy/Netbeans Projects/Python/RPN/src/crcm5/mh_domains/show_domain_with_drainage_area.py", line 203, in main
crs = pycrs.parser.from_proj4(bmp.proj4string + " +ellps={}".format("WGS84"))
File "/Users/huziy/virtualenvs/py3.4/lib/python3.4/site-packages/pycrs/parser.py", line 565, in from_proj4
raise Exception("The specified projection name could not be found")
Exception: The specified projection name could not be found
```

Below is my test code (the pj=basemap.proj4string + " +ellps=WGS84"):

``` python
import pycrs
pj = "+R=6370997.0 +lon_0=-97.0 +o_lat_p=42.5 +units=m +proj=ob_tran +o_lon_p=180.0 +o_proj=longlat +ellps=WGS84"
crs = pycrs.parser.from_proj4(pj)
print(crs.to_esri_wkt())
```

Cheers

Start by running the supplied Python snippet and reviewing Basemap's proj4string output alongside the pycrs and GDAL conversion paths mentioned in the report. The issue names no Basemap source file or test; done would require a confirmed path for handling this rotpole projection in ESRI shapefile output, or a documented limitation if it is unsupported.

Written by the indexing model from the issue text.