Bug report #10245

Defining custom CRS in QGIS 2.2

Added by Jorge Rocha over 7 years ago. Updated over 7 years ago.

Status:Closed
Priority:Normal
Assignee:Jorge Rocha
Category:Projection Support
Affected QGIS version:2.2.0 Regression?:No
Operating System:Ubuntu Easy fix?:No
Pull Request or Patch supplied:No Resolution:
Crashes QGIS or corrupts data:No Copied to github as #:18682

Description

For some reason, defining a new CRS is not working. The following error is reported: The proj4 definition of 'name' is not valid.

I'm defining a new CRS, from Settings -> Custom CRS... with:

Name: China Geodetic Coordinate System 2000
Parameters: +proj=geocent +ellps=GRS80 +units=m +no_defs

These parameters were pasted from EPSG:4479 definition.

!Screenshot - 05122014 - 02:10:07 PM.png!

I can use the calculator at the bottom to test the coordinate transformation, and it seems to works.

But it does not save the new CRS. It reports the following error: The proj4 definition of 'China Geodetic Coordinate System 2000' is not valid.

!Screenshot - 05122014 - 02:10:39 PM.png!

I've tried to add this projection to PostGIS and it works.

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 4479, 'EPSG', 4479, '+proj=geocent +ellps=GRS80 +units=m +no_defs ', 'GEOCCS["China Geodetic Coordinate System 2000",DATUM["China_2000",SPHEROID["CGCS2000",6378137,298.257222101,AUTHORITY["EPSG","1024"]],AUTHORITY["EPSG","1043"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Geocentric X",OTHER],AXIS["Geocentric Y",OTHER],AXIS["Geocentric Z",NORTH],AUTHORITY["EPSG","4479"]]');

select ST_AsText(ST_Transform(ST_SetSRID(ST_Makepoint(114,30), 4326), 4479));

"POINT(-2248544.5475367 5050313.74152924)" 

07_PM.png - Custom CRS definition (97.2 KB) Jorge Rocha, 2014-05-12 03:37 PM

39_PM.png - Error reported (16.8 KB) Jorge Rocha, 2014-05-12 03:37 PM

History

#1 Updated by Jorge Rocha over 7 years ago

  • % Done changed from 0 to 100
  • Assignee set to Jorge Rocha
  • Status changed from Open to Closed

With the precious feedback from Andre Joost, proj4 does not support the geocent projection.

proj -lp | grep geocent

Does not return any projection matching geocent.

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