<blockquote class="gmail_quote" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">Alternatively, how about categorising operators like the expression<br>
builder in a spreadsheet?</blockquote><div><br></div><div>Have you seen the expression builder used for labeling? <a href="http://woostuff.wordpress.com/2011/10/27/expression-based-labeling/">http://woostuff.wordpress.com/2011/10/27/expression-based-labeling/</a></div>
<div><br></div><div>The goal is to replace the current calculator with something that.</div><div><br></div><blockquote class="gmail_quote" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
Something else that might be useful is a preview window for the raster</blockquote><div><br></div><div>This would be a cool idea. </div><div><br></div><div>- Nathan</div><br><div class="gmail_quote">On Thu, Jan 26, 2012 at 9:06 PM, John Donovan <span dir="ltr"><<a href="mailto:mersey.viking@gmail.com">mersey.viking@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">One way of hiding some of the syntactic complexity might be to use one<br>
of the visual workflow systems like Orange <a href="http://orange.biolab.si/" target="_blank">http://orange.biolab.si/</a> to<br>
construct raster operations, especially if it somehow tied in with the<br>
SAGA/Grass/etc. workflow stuff that's being developed. True, this is<br>
not an insignificant amount of work, but if all it did was generate<br>
valid rastercalc expressions, then it can sit on top of the current<br>
system rather than replace it.<br>
<br>
Alternatively, how about categorising operators like the expression<br>
builder in a spreadsheet?<br>
<br>
Something else that might be useful is a preview window for the raster<br>
calculator. I got bitten by a similar issue to Tim, where I wanted to<br>
invert the values in my raster. I used:<br>
-myraster@1<br>
Which is a valid expression, but returned 0 for all values. Instead I<br>
had to use:<br>
-(myraster@1)<br>
<br>
This wasted 20 minutes on my very large dataset. In hindsight I should<br>
have done in the first place what I did in the end, and tested it with<br>
a subset of my big raster, but a small thumbnail like some of the Gimp<br>
plug-ins have would have saved me some time.<br>
<br>
-John<br>
<br>
On 26 January 2012 10:43, Marco Hugentobler<br>
<div><div class="h5"><<a href="mailto:marco.hugentobler@sourcepole.ch">marco.hugentobler@sourcepole.ch</a>> wrote:<br>
> Hi Nathan<br>
><br>
><br>
>>One question, how needed is the Min X, Max Y etc stuff. Currently it takes<br>
>> up a lot of room and clutters (IMO) the interface. I was thinking we might<br>
>> be able to hide it in an >advanced section if it is only used rarely.<br>
><br>
> IMO, you could move those element into an advanced section. It is important<br>
> to have the possibility to set the output resolution, but not a setting you<br>
> need fast access to.<br>
><br>
> Regards,<br>
> Marco<br>
><br>
><br>
> On 26.01.2012 01:15, Nathan Woodrow wrote:<br>
><br>
> Hey Paolo,<br>
><br>
> I stated working on adding the expression builder widget last night, didn't<br>
> get very far as I had to do some other things.<br>
><br>
> One question, how needed is the Min X, Max Y etc stuff. Currently it takes<br>
> up a lot of room and clutters (IMO) the interface. I was thinking we might<br>
> be able to hide it in an advanced section if it is only used rarely.<br>
><br>
> - Nathan<br>
><br>
> On Thu, Jan 26, 2012 at 4:13 AM, Paolo Cavallini <<a href="mailto:cavallini@faunalia.it">cavallini@faunalia.it</a>><br>
> wrote:<br>
>><br>
>> Hi all.<br>
>> How about simplifying the syntax of raster calc? If even Tim can get<br>
>> wrong:<br>
>><br>
>> <a href="http://linfiniti.com/2012/01/simple-binary-raster-reclassification-in-qgis/" target="_blank">http://linfiniti.com/2012/01/simple-binary-raster-reclassification-in-qgis/</a><br>
>> this means that the average user will be in trouble.<br>
>> Am I wrong?<br>
>> Of course, using the expression widget now used for field calc and for<br>
>> labelling<br>
>> would probably solve the issue.<br>
>> All the best.<br>
>> --<br>
>> Paolo Cavallini - Faunalia<br>
>> <a href="http://www.faunalia.eu" target="_blank">www.faunalia.eu</a><br>
>> Full contact details at <a href="http://www.faunalia.eu/pc" target="_blank">www.faunalia.eu/pc</a><br>
>> _______________________________________________<br>
>> Qgis-developer mailing list<br>
>> <a href="mailto:Qgis-developer@lists.osgeo.org">Qgis-developer@lists.osgeo.org</a><br>
>> <a href="http://lists.osgeo.org/mailman/listinfo/qgis-developer" target="_blank">http://lists.osgeo.org/mailman/listinfo/qgis-developer</a><br>
><br>
><br>
><br>
><br>
> _______________________________________________<br>
> Qgis-developer mailing list<br>
> <a href="mailto:Qgis-developer@lists.osgeo.org">Qgis-developer@lists.osgeo.org</a><br>
> <a href="http://lists.osgeo.org/mailman/listinfo/qgis-developer" target="_blank">http://lists.osgeo.org/mailman/listinfo/qgis-developer</a><br>
><br>
><br>
><br>
> --<br>
> Dr. Marco Hugentobler<br>
> Sourcepole - Linux & Open Source Solutions<br>
> Churerstrasse 22, CH-8808 Pfäffikon SZ, Switzerland<br>
> <a href="mailto:marco.hugentobler@sourcepole.ch">marco.hugentobler@sourcepole.ch</a> <a href="http://www.sourcepole.ch" target="_blank">http://www.sourcepole.ch</a><br>
> Technical Advisor QGIS Project Steering Committee<br>
><br>
><br>
> _______________________________________________<br>
> Qgis-developer mailing list<br>
> <a href="mailto:Qgis-developer@lists.osgeo.org">Qgis-developer@lists.osgeo.org</a><br>
> <a href="http://lists.osgeo.org/mailman/listinfo/qgis-developer" target="_blank">http://lists.osgeo.org/mailman/listinfo/qgis-developer</a><br>
><br>
<br>
<br>
<br>
--<br>
</div></div>One of the advantages of being disorderly is that one is constantly<br>
making exciting discoveries. - AA Milne<br>
<div class="HOEnZb"><div class="h5">_______________________________________________<br>
Qgis-developer mailing list<br>
<a href="mailto:Qgis-developer@lists.osgeo.org">Qgis-developer@lists.osgeo.org</a><br>
<a href="http://lists.osgeo.org/mailman/listinfo/qgis-developer" target="_blank">http://lists.osgeo.org/mailman/listinfo/qgis-developer</a><br>
</div></div></blockquote></div><br>