[GRASS-dev] [grass-code R][585] Display of current pixel value of pointer in gis.m (in addition to the coordinates on the lower right corner)

[Michael Barton]

On Jan 23, 2008, at 8:32 AM, grass-dev-request at lists.osgeo.org wrote:

> Date: Tue, 22 Jan 2008 19:52:55 +0100 (CET)
> From: <grass-dev at lists.osgeo.org>
> Subject: [GRASS-dev] [grass-code R][585] Display of current pixel
> 	value of	pointer in gis.m (in addition to the coordinates on the  
> lower
> 	right corner)
> To: noreply at wald.intevation.org
> Message-ID: <20080122185255.3CE964054A at pyrosoma.intevation.org>
> Content-Type: text/plain; charset=UTF-8
>
> code R item #585, was opened at 2008-01-22 18:52
> Status: Open
> Priority: 3
> Submitted By: Nikos Alexandris (nikosa)
> Assigned to: Nobody (None)
> Summary: Display of current pixel value of pointer in gis.m (in  
> addition to the coordinates on the lower right corner)
> Issue status: None
> GRASS component: None
> Operating system: None
> Operating system version:
>
>
> Initial Comment:
> Is it difficult to display in gis.m (on the lower right corner) the  
> value of the pixel that is currently "touched" by the  
> (mouse-)pointer, along with the coordinates?
>
> It wouldn't be necessary to Query the whole time just for a quick- 
> view!
>

In order to find out the value of the spatial data that is under the  
pixel, you have to query it. There are different query routines for  
raster and vector maps.

Michael
______________________________
Michael Barton, Professor
Professor of Anthropology
Director of Graduate Studies
School of Human Diversity & Social Change
Center for Social Dynamics & Complexity
Arizona State University
Tempe, AZ  85287-2402
USA

voice: 480-965-6262; fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton