[GRASS-dev] Re: [GRASS GIS] #106: wxgrass: zoom to computational
region does not respect resolution set with g.region
michael.barton at asu.edu
Fri Mar 28 18:15:28 EDT 2008
On Mar 28, 2008, at 5:32 AM, Moritz Lennert wrote:
> 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.
I agree that it would be quite helpful for just the reason you
describe to have the computational resolution shown, if it's not (it
may be an option, but I don't remember at the moment). This is a good
idea to add that to the display option.
But there is no point in making the display itself have the same
resolution (xy pixels) as the map.
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