Hi! Andrea, you can use mapcalc available in grass plugin in qgis. you can create a blank raster and then load the two rasters in mapcalc. and then put the if condition for eg. if((A > 150), B == A, null())
it would copy values greater than 150 from raster A to raster B. I hope I got it right for you. cheers, Ambrish Dhaka On 4/23/2011 3:31 PM, iomeneandrei wrote:
Dear all, I would like to highlight all the pixels of a DEM with a value exceeding a specific height value. Something like "SELECT * FROM dem WHERE zvalue> 150". Is there a way to do this in QGIS? Is grass plugin the only tool I can use inside QGIS to make this kind of query? Is there a way to have only something that highlights the pixels and do not produce a new layer? Thank you, Andrea ----- Andrea Borruso ---------------------------------------------------- email: [email protected] website: http://blog.spaziogis.it my 2.0 life: http://aborruso.spaziogis.it feed: http://feeds2.feedburner.com/Tanto 38° 7' 48" N, 13° 21' 9" E ---------------------------------------------------- -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/to-query-a-raster-tp6299256p6299256.html Sent from the qgis-user mailing list archive at Nabble.com. _______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
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