[GRASS-dev] Re: [GRASS GIS] #106: wxgrass: zoom to computational region does not respect resolution set with g.region

Moritz Lennert mlennert at club.worldonline.be
Fri Mar 28 08:32:40 EDT 2008

On 28/03/08 07:10, Michael Barton wrote:
>>  I think it would be useful to have the same system as in gis.m, i.e. 
>> with
>>  one display mode aligning to window size and another mode showing the
>>  exact computation region, i.e. respecting extent and resolution.
> I think that these two different modes are fairly confusing to most users.
> Martin has implemented something that I think is much more useful and 
> easier to understand, and that serves the same purpose. As mentioned 
> above, the display always fills the window and has a constant 
> resolution. However, the computational region is shown by a red box 
> outline. This means you can always tell the region in which map 
> modification operations will take place, without having a very 
> strange-looking map in the display window, with a lot of white space 
> around it.

But that brings us back to my original response ("The issue is not only 
the extent, but also the resolution."). Yes, the red box is very useful 
(although the functionality is maybe a hidden - maybe the "show" text 
box should always be visible and read "show extent of computational 
region", but a visual information about the resolution is also very 
important. It has happened to me often enought that I launch a command 
which then takes much longer than expected, only to find out that the 
computational region's resolution was much higher than the display's. 
Having a mode which allows seeing the exact computational region 
settings is, thus, very helpful...No need to make it the default, and 
you could possibly hide it a bit to not confuse users, but IMHO, it 
should be an option for power users.


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