[Qgis-developer] To be (or not to be) less restrictive on interpreting CRSes

[Borys Jurgiel]

Last days we made really huge progress improving CRS handling. One of the 
changes was JEF's less restrictive CRS interpreting: 
http://trac.osgeo.org/qgis/changeset/15361 . If nobody disagree, I'd propose 
to extend it also for the +towgs84 parameter.

In the resources/srs.db we have added a number of CRSes in both versions: one 
with +towgs because of reprojection accuracy and one without because of 
compatibility with layers produced by most software. For example: 
epsg 2180 and 42180. 

It would be much simpler for users if we could keep the full projStrings (with 
the parameter) only and Qgis was able to recognize layers with missing 
parameter as them.  We would be also able to remove the odd CRSes and decrease 
the difference between our crs database and the original proj4 one.