[Qgis-user] RECLASSIFICATION ON A RASTER LAYER

[Carlos Cerdán]

Hi Mariana:

The official QGIS manual has a lack in this point, so here is a tip for
Raster Calculator: You must to use logical expressions for your task:

(raster >=0 and raster<1)*1+(raster>=1 and raster<2.5)*2+(raster>=2.5 and
raster<4.5)*3 ... etc

Where "raster" is the layer that you want reclassify. Expression between
parentheses takes 1 value if it's true, else 0. Result is  reclassification
that you want.

Regards from Perú

Carlos Cerdán

2015-09-21 11:11 GMT-05:00 Mariana Buzzi <marianabuzzi86 at gmail.com>:

>
> ---------- Forwarded message ----------
> From: Mariana Buzzi <marianabuzzi86 at gmail.com>
> Date: 2015-09-21 13:03 GMT-03:00
> Subject: [Qgis-user] (no subject)
> To: qgis-user at lists.osgeo.org
>
>
> Hello people! How are you?
> I connect with you because I want to do a reclassification on a raster
> layer, the same information is pendient. What I want is to perform a
> reclassification so that the slope values quedende me as follows:
>
> 0-1 -> give them the new value of 1
> 1 to 2.25 -> give the new value of 2.
> 2.25 to 4.5 -> give the new value of 3
> 4.5 to 9 -> give the new value of 4
> 9 and higher than 9 ---> give the new value of 5
>
> Of course, I appreciate it and it is always useful answers !!!
> They have always helped me to move forward!
>
> Regards!
>
> Mariana
> Patagonia Argentina
>
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