[GRASS-dev] Create new location from EPSG code backport problem

[Michael Barton]

I'm very happy that you were able to make this update. If there is anything
you'd like me to do to help, please let me know. Also, we should probably
port the functionality to the location wizard in wxPython.

Michael


On 8/14/07 2:47 PM, "Paul Kelly" <paul-grass at stjohnspoint.co.uk> wrote:

> On Wed, 25 Apr 2007, Paul Kelly wrote:
> 
>> Hello Hamish
>> I'm not sure if it's correct/optimum in the current CVS. I posted some plans
>> here:
>> http://www.nabble.com/forum/ViewPost.jtp?post=9125507&framed=y
>> that I think should be fixed before it goes into a stable release.
>> 
>> In particular I'm not sure if the logic in the Tcl code for the order of the
>> various g.proj calls and the value of the datumtrans= option is correct yet.
>> IIRC the location should be created on the first attempt if there is no list
>> of datum transformation paramters, and the default when there is a choice
>> should be 0 (unspecified) rather than forcing the first set. But the Tcl code
>> doesn't do this.
>> 
>> Will try and find time to have a look at it.
> 
> I've now revisited this and implemented most things I described in the
> link above apart from the region setting/verification dialog.
> I added a prettier radio button-based dialog for the datum transformation
> parameter selection. I also have hopefully tested it fairly robustly for a
> range of EPSG codes that result in various different warnings and error
> output from g.proj, and these should all be reported correctly now.
> 
> The datum transformation selection / improved g.proj interaction needs to
> be implemented for the georeferenced file option as well as the EPSG
> option - I could have easily done this by copying and pasting code but
> that seemed very quick and dirty - would much rather reduce code
> repetition and share the necessary functions but I've already had enough
> Tcl for a little while :) Am starting to pick it up though. There seem to
> be some solid and clear design ideas behind it but the operating system
> interaction bits have a few quirks and I suppose we're pushing it pretty
> hard in gis.m.
> 
> Paul
> 
> 

__________________________________________
Michael Barton, Professor of Anthropology
Director of Graduate Studies
School of Human Evolution & Social Change
Center for Social Dynamics and Complexity
Arizona State University

phone: 480-965-6213
fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton