[GRASS5] Re: using r.in.gdal on png provides negative south/west

[Stefan Paulick]

That's one of the shoals driving unexperienced users into deepest depression 
 - displaying  the imported stuff does show a blank screen which may mislead 
to the opinion that the import failed: wrong image format, gdal not working, 
dunno whatever! 

Frank: Is it a man's task to get positive readings? 

If yes, I would love to see some kind of information/warning out of 
r..in.gdal; maybe combined with a hint how to solve. it. Should do, even for 
me...:_)) 


/Stefan 


Markus Neteler schrieb: 

> On Fri, Jan 21, 2005 at 03:23:48AM +0100, Stefan Paulick wrote:
>> When importing the attached png into a 50x50 xy-Location, the region 
>> settings become negative. With former r.in.png, they were positive. 
>> *confused* 
> 
> Here is what the source code says: 
> 
> raster/r.in.gdal/main.c
> /*
>  * r.in.gdal imports many GIS/image formats into GRASS utilizing the GDAL
>  * library
>  *
>  * copyright of this file
>  * Author: Frank Warmerdam
>  *
>  * Added optional GCP transformation: Markus Neteler 10/2001
>  * TODO: most unreferenced formats are read in with negative coordinates - desired??
>  */ 
> 
> See the last line... open for discussion. 
> 
> Markus 
> 
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