> > Alternatively, how about categorising operators like the expression > builder in a spreadsheet?
Have you seen the expression builder used for labeling? http://woostuff.wordpress.com/2011/10/27/expression-based-labeling/ The goal is to replace the current calculator with something that. Something else that might be useful is a preview window for the raster This would be a cool idea. - Nathan On Thu, Jan 26, 2012 at 9:06 PM, John Donovan <mersey.vik...@gmail.com>wrote: > One way of hiding some of the syntactic complexity might be to use one > of the visual workflow systems like Orange http://orange.biolab.si/ to > construct raster operations, especially if it somehow tied in with the > SAGA/Grass/etc. workflow stuff that's being developed. True, this is > not an insignificant amount of work, but if all it did was generate > valid rastercalc expressions, then it can sit on top of the current > system rather than replace it. > > Alternatively, how about categorising operators like the expression > builder in a spreadsheet? > > Something else that might be useful is a preview window for the raster > calculator. I got bitten by a similar issue to Tim, where I wanted to > invert the values in my raster. I used: > -myraster@1 > Which is a valid expression, but returned 0 for all values. Instead I > had to use: > -(myraster@1) > > This wasted 20 minutes on my very large dataset. In hindsight I should > have done in the first place what I did in the end, and tested it with > a subset of my big raster, but a small thumbnail like some of the Gimp > plug-ins have would have saved me some time. > > -John > > On 26 January 2012 10:43, Marco Hugentobler > <marco.hugentob...@sourcepole.ch> wrote: > > Hi Nathan > > > > > >>One question, how needed is the Min X, Max Y etc stuff. Currently it > takes > >> up a lot of room and clutters (IMO) the interface. I was thinking we > might > >> be able to hide it in an >advanced section if it is only used rarely. > > > > IMO, you could move those element into an advanced section. It is > important > > to have the possibility to set the output resolution, but not a setting > you > > need fast access to. > > > > Regards, > > Marco > > > > > > On 26.01.2012 01:15, Nathan Woodrow wrote: > > > > Hey Paolo, > > > > I stated working on adding the expression builder widget last night, > didn't > > get very far as I had to do some other things. > > > > One question, how needed is the Min X, Max Y etc stuff. Currently it > takes > > up a lot of room and clutters (IMO) the interface. I was thinking we > might > > be able to hide it in an advanced section if it is only used rarely. > > > > - Nathan > > > > On Thu, Jan 26, 2012 at 4:13 AM, Paolo Cavallini <cavall...@faunalia.it> > > wrote: > >> > >> Hi all. > >> How about simplifying the syntax of raster calc? If even Tim can get > >> wrong: > >> > >> > http://linfiniti.com/2012/01/simple-binary-raster-reclassification-in-qgis/ > >> this means that the average user will be in trouble. > >> Am I wrong? > >> Of course, using the expression widget now used for field calc and for > >> labelling > >> would probably solve the issue. > >> All the best. > >> -- > >> Paolo Cavallini - Faunalia > >> www.faunalia.eu > >> Full contact details at www.faunalia.eu/pc > >> _______________________________________________ > >> Qgis-developer mailing list > >> Qgis-developer@lists.osgeo.org > >> http://lists.osgeo.org/mailman/listinfo/qgis-developer > > > > > > > > > > _______________________________________________ > > Qgis-developer mailing list > > Qgis-developer@lists.osgeo.org > > http://lists.osgeo.org/mailman/listinfo/qgis-developer > > > > > > > > -- > > Dr. Marco Hugentobler > > Sourcepole - Linux & Open Source Solutions > > Churerstrasse 22, CH-8808 Pfäffikon SZ, Switzerland > > marco.hugentob...@sourcepole.ch http://www.sourcepole.ch > > Technical Advisor QGIS Project Steering Committee > > > > > > _______________________________________________ > > Qgis-developer mailing list > > Qgis-developer@lists.osgeo.org > > http://lists.osgeo.org/mailman/listinfo/qgis-developer > > > > > > -- > One of the advantages of being disorderly is that one is constantly > making exciting discoveries. - AA Milne > _______________________________________________ > Qgis-developer mailing list > Qgis-developer@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/qgis-developer >
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