[Qgis-user] Re: RasterCalc

[Alessandro Sarretta]

Hi Alexander,
thanks for your great work in this very useful plugin!
I was wondering if it is possible to add other (I think) interesting 
functionalities to RasterCalc plugin:
- define a pixel resolution
- use a layer (vector or raster) as a mask
- use a layer (raster) as a region, in the sense of GRASS region, i.e. 
using its pixel resolution, bounding box
thank again!
Ale(ssandro)

Alexander Bruy wrote:
> Hi Agustin,
>
> thanks for your interest and feedback
>
> 2010/1/22 Agustin Lobo <alobolistas at gmail.com>:
>   
>> 1. Resulting raster is loaded in qgis as name.tif instead as name as usual.
>> 2. If name.tif is selected for processing, you get a syntax error
>> 3. If name.tif is renamed to name in the Layers list, the syntax error goes
>> away.
>>     
>
> I'll fix all this issues tonight
>
>   
>> 4. Could you include a round() function?
>> 5. In general, could you include all functions required to match
>> r.mapcalc functionality?
>>     
>
> Ok, I'll try to include round() function ASAP.
> About r.mapcalc functionality. We plan to improve plugin in future,
> but unfortunatelly now I haven't much time (need to complete one project).
> As result I can't say how quick I can add this stuff. I'll add your request to
> the TODO and implement it later.
>
>   
>> On Win XP (Standalone):
>> 1.The plugin gets installed but cannot be run: "Couldn't import Python
>> module 'pyparsing'. Without it you won't be able to run RasterCalc"
>> Does this mean that RasterCalc can be run from the Osgeo4w version
>> only? If this is the case, this notice should be issued at installing
>> the plugin. And, most important, will we have RasterCalc working for
>> the Standalone version soon? (I'm interested on using it for a course).
>>     
>
> RasterCalc should work with both QGIS, standalone and Osgeo4w if all
> required modules are present. Required modules are: numpy, osgeo.gdal
> (Python bindings to GDAL) and pyparsing.
>
> As far as I know numpy and Python bindings to GDAL are already present
> in standalone QGIS. So if you want to use RasterCalc with standalone
> QGIS you only need to download and install pyparsing into QGIS python
> folder.
>
> homepage: http://pyparsing.wikispaces.com/
> download page: http://sourceforge.net/projects/pyparsing/files/
>
> Hope this helps. If you have any other questions feel free to email me.
>
> Regards
>