Opened 15 years ago

Last modified 14 years ago

#631 closed defect

Discrepancies between tcl/tk and wxpython PROJ_INFO files — at Version 1

Reported by: voncasec Owned by: grass-dev@…
Priority: normal Milestone: 6.4.0
Component: Default Version: unspecified
Keywords: Projections, wxpython, tcltk Cc:
CPU: Unspecified Platform: Unspecified

Description (last modified by neteler)

I have been noticing some discrepancies in the PROJ_INFO files that are created using Grass6.4 RC4 between the projection values option in the tcltk interface and the location wizard option using the wxpython interface.

For example, inputting the projection info:

Coordinate System=UTM
Datum=Nad27 - T04 (Transformation Parameters for Alaska)
Ellipse: Clark66
Zone=8

I get the following PROJ_INFO files created.

tcltk interface results:

name: UTM
datum: nad27
nadgrids: alaska
proj: utm
ellps: clark66
a: 6378206.4000000004
es: 0.0067686580
f: 294.9786982000
zone: 8

wxpython results:

name: Universe Transverse Mercator
proj: utm
ellps: clark66
zone: 8
no_defs: defined

The summary at the end of the wxpython location wizard method says the proj.4 definition is:

+proj=utm, +zone=8, +a= 6378206.4000000004, +rf=294.9786982000, +dx=-22, +dy=157.0, +dz=176.0, +no_defs, +nadgrids=alaska

but if I run g.proj -j -f, I get the following output (which matches the PROJ_INFO file):

+proj=utm +no_defs +zone=8 +a=6378206.4 +rf=294.9786982 +to_meter=1

Change History (1)

comment:1 by neteler, 14 years ago

Description: modified (diff)

(prettified original report)

I just wonder if it is a problem what "nad27" isn't in the wxpython PROJ_INFO file

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