On Mar 1, 2008, at 1:47 AM, Martin Landa wrote:
Micheal,
2008/3/1, Michael Barton <[EMAIL PROTECTED]>:
2008/2/29, Dylan Beaudette <[EMAIL PROTECTED]>:
[snip]
Thanks for the update. I don't regularly use either of the GUI and
did
not know about this feature. Does the patch that I submitted
interfere
with this functionality? I think that it would be useful to have
this
functionality in the old style monitors as well.
d.measure is not used in wxGUI. Display windows are not
registered as
GRASS displays (d.mon -L) [TODO, not sure how to implemented], I
think
it would be good to use d.measure or something like g.measure in
wxGUI
too instead of using Python-based function for distance calculation
(at least it would make sense for LL projections)? Please correct me
if I am wrong.
Michael,
What's wrong with the Python one?
duplication of the code, and in this particular case ignoring geodetic
distance for LL projections.
Well, my understanding of the direction of GRASS is that by v7, we'll
lose all the interactive xterm-specific d.* modules. Interactive use
will all be shifted to whatever GUI we design, rather than being hard-
coded into a module. Simple, interactive measurement between 2 points
on a display screen seems to me something to be handled by a GUI.
d.measure will go away OR change to a module in which you enter a
start and end point and it returns the distance between the points.
In the latter case, it could then be 'plugged into' a GUI as a
function to calculate distance between points interactively 'grabbed'
by the GUI.
Ignoring geodetic distance for LL projections is simply ignorance (on
my part here) of the equations needed to do it. It's easy to
determine if a location is LL. In that case, it should calculate
geodetic distance rather than (or perhaps in addition to) displaying
distance in map units. Just need to have the functions to do this
added to the measurement methods.
Michael
_______________________________________________
grass-dev mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/grass-dev
