[QGIS-trac] Re: [Quantum GIS] #1196: projection parameter +no_uoff is not applied to layer SRS; affects Michigan GeoRef

Quantum GIS qgis at qgis.org
Mon Sep 1 04:17:07 EDT 2008


#1196: projection parameter +no_uoff is not applied to layer SRS; affects Michigan
GeoRef
-----------------------------------------------------+----------------------
        Reporter:  smizuno                           |         Owner:  nobody           
            Type:  bug                               |        Status:  closed           
        Priority:  major: does not work as expected  |     Milestone:  Version 1.0.0    
       Component:  Projection Support                |       Version:  HEAD             
      Resolution:  invalid                           |      Keywords:  projection georef
Platform_version:                                    |      Platform:  All              
        Must_fix:  No                                |   Status_info:  0                
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Changes (by msieczka):

  * status:  new => closed
  * resolution:  => invalid

Comment:

 Current stable GDAL interprets EPSG:3078 in the following way:

 {{{
 $ epsg_tr.py 3078 -proj4
 # NAD83 / Michigan Oblique Mercator
 <3078> +proj=omerc +lat_0=45.30916666666666 +lonc=-86 +alpha=337.25556
 +k=0.9996 +x_0=2546731.496 +y_0=-4354009.816 +ellps=GRS80 +datum=NAD83
 +units=m +no_defs  <>
 }}}

 As you see there is no no_uoff parameter above. Since QGIS CRS is created
 according to GDAL's interpretation of EPSG codes (epsg_tr.py output) this
 is not a QGIS issue but a GDAL one.

 Please report it to GDAL devs. Once it is fixed in GDAL (i.e. epsg_tr.py
 produces a correct proj4 representation of EPSG codes in question) add a
 notice to this ticket and QGIS CRS database will be updated.

-- 
Ticket URL: <https://trac.osgeo.org/qgis/ticket/1196#comment:1>
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