[QGIS-trac] Re: [Quantum GIS] #1079: on the fly projections do not work

[Quantum GIS]

#1079: on the fly projections do not work
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        Reporter:  pcav                                       |         Owner:  mhugent      
            Type:  defect                                     |        Status:  closed       
        Priority:  critical: causes crash or data corruption  |     Milestone:  Version 1.0.0
       Component:  Projection Support                         |       Version:  HEAD         
      Resolution:  fixed                                      |      Keywords:  srs.db datum 
Platform_version:                                             |      Platform:  All          
        Must_fix:  Yes                                        |   Status_info:  1            
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Comment (by marcopx):

 Replying to [comment:11 neteler]:
 > Replying to [comment:10 leolami]:
 > > Hi all,
 > > the problem seems solved, I tested using a projection like Gauss Boaga
 standard (EPSG code=3003)
 > >
 > > +proj=tmerc +lat_0=0 +lon_0=9 +k=0.9996 +x_0=1500000 +y_0=0
 +ellps=intl +units=m +no_defs
 >
 > Note that this string is incomplete. It lacks +towgs84=...
 >
 > See also #377 and especially #418. The problem persists and needs to be
 solved.
 >
 > Markus

 yes. when I work with GB projections in QGIS I define a custom projection.
 For example, for Gauss Boaga Roma40 West, peninsular part, I define:

 +proj=tmerc +ellps=intl +lat_0=0 +lon_0=9 +k=0.9996 +x_0=1500000 +y_0=0
 +no_defs +a=6378388 +rf=297
 +towgs84=-104.1,-49.1,-9.9,0.971,-2.917,0.714,-11.68 +to_meter=1

 the epsg code 3003 is too generic for that purpose

 Marco

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Ticket URL: <https://trac.osgeo.org/qgis/ticket/1079#comment:13>
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