[Qgis-user] reclass raster nodata=0

[Raymond Nijssen]

Tusentakk Håvard, that works fine!

But still wondering why GRASS can reclass a 0=NULL, but not a NULL=0...


On 30-12-16 12:46, Havard Tveite wrote:
> You could use the GRASS function r.null (available in
> Processing).
>
> Håvard
>
> On 30. des. 2016 11:35, Raymond Nijssen wrote:
>> I'd like to reclass a raster that contains just cells with values nodata
>> and 1. (I created it by rasterizing a polygon layer.)
>>
>> Now I want to change all nodata values to 0, but I cannot find any way
>> to do this. I tried the grass and gdal tools and the qgis raster
>> calculator, but without luck.
>>
>> Does anyone know?
>>
>> Thanks!
>> Raymond
>>
>>
>> PS
>>
>> In fact I have 2 of these layers and I want to "union" them. So I tried:
>>
>> raster1 OR raster2
>>
>> in the calculator, but that only returns 1 for the cells that contain a
>> 1 in both input rasters, resulting in the overlapping area.
>>
>> By changing nodata to 0, I'm hoping to calculate:
>>
>> (raster1 + raster2) ^ 0
>>
>> and get my desired results.
>>
>> Any ideas on this?
>> _______________________________________________
>> Qgis-user mailing list
>> Qgis-user at lists.osgeo.org
>> List info: http://lists.osgeo.org/mailman/listinfo/qgis-user
>> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
>

-- 
Terglobo
Fahrenheitstraat 1
5223 BJ 's-Hertogenbosch
06 25 31 49 83