[GRASS-dev] [GRASS GIS] #1452: wx location wizard doesn't ask for datum transform options because proj4 4.7.1's epsg file is broken

[GRASS GIS]

#1452: wx location wizard doesn't ask for datum transform options because proj4
4.7.1's epsg file is broken
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 Reporter:  hamish                   |       Owner:  grass-dev@…              
     Type:  defect                   |      Status:  new                      
 Priority:  critical                 |   Milestone:  6.4.3                    
Component:  Projections/Datums       |     Version:  svn-releasebranch64      
 Keywords:  location wizard, g.proj  |    Platform:  All                      
      Cpu:  All                      |  
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Comment(by neteler):

 Replying to [comment:23 cmbarton]:
 > Replying to [comment:20 neteler]:
 > > For example, the Italian EPSG code 3003 works nicely, see attached
 > > screenshot.
 > OK. I did a couple tests and see better where my problem lies.
 >
 > Datum transforms DO work OK for EPSG codes but do NOT work for selecting
 the same parameters
 > from a list. For example, if you select ED50, UTM Zone 29 from the EPSG
 list (23029) you get
 > a datum transform list.

 (http://spatialreference.org/ref/epsg/23029/)

 So no issue here... (except for the fact that the PROJ4 4.7.1 release is
 broken, so
 either downgrade or upgrade).

 > But if you pick UTM, Zone 29, ED50 from the list of projections and
 datums you
 > do NOT get a list of datum transforms.

 This looks like unrelated to this bug (to me). And  I don't think that
 this
 behaviour can be changed, how should PROJ4/GRASS GIS know from the literal
 description (rather than formal EPSG code) which datums to suggest? See
 for
 example the list of projections:
 http://spatialreference.org/ref/?search=UTM+zone+29N

 All come with different ellipsoids, datums and so on...

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Ticket URL: <https://trac.osgeo.org/grass/ticket/1452#comment:24>
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