[postgis-devel] [PostGIS] #211: Inverse transformation borks when fed +nadgrids=@null

[PostGIS]

#211: Inverse transformation borks when fed +nadgrids=@null
----------------------+-----------------------------------------------------
  Reporter:  pramsey  |       Owner:  mcayland     
      Type:  defect   |      Status:  new          
  Priority:  medium   |   Milestone:  postgis 1.3.7
 Component:  postgis  |     Version:  1.3.X        
Resolution:           |    Keywords:               
----------------------+-----------------------------------------------------
Comment (by mcayland):

 Works for me (correcting the small typo in your spatial_ref_sys proj4text
 above):


 pg83 at zeno:~/src/postgis-svn/1.3$ psql -d postgis13
 Welcome to psql 8.3.5, the PostgreSQL interactive terminal.

 Type:  \copyright for distribution terms
        \h for help with SQL commands
        \? for help with psql commands
        \g or terminate with semicolon to execute query
        \q to quit

 postgis13=# insert into spatial_ref_sys (srid, proj4text) values (900913,
 '+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0
 +units=m +k=1.0 +nadgrids=@null +no_defs');
 INSERT 0 1
 postgis13=# select
 st_astext(st_transform(st_transform('SRID=4326;POINT(-71.057810000000003
 42.358919999999998)',900913),4326));
          st_astext
 ---------------------------
  POINT(-71.05781 42.35892)
 (1 row)

 postgis13=# select postgis_full_version();
                                   postgis_full_version
 ----------------------------------------------------------------------------------------
  POSTGIS="1.3.7SVN" GEOS="3.1.0-CAPI-1.5.0" PROJ="Rel. 4.6.1, 21 August
 2008" USE_STATS
 (1 row)

 postgis13=#


 ATB,

 Mark.

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/211#comment:2>
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