Dear Brent,

Yes that works for me too !

Sometimes I look for what is familiar and overlook the obvious – a little 
embarrassing, but I know now .

Many thanks

Darrel

From: Brent Wood [mailto:[email protected]]
Sent: 27 November 2015 21:53
To: PostGIS Users Discussion <[email protected]>; Darrel Maddy 
<[email protected]>
Subject: Re: [postgis-users] Help with SQL query?


Darrel

You can use the logical operators in the QGIS raster calculator as a binary 
conditional :

eg: raster a is used to generate a new raster with default 0, but pixel value=1 
 where pixels in a have a value >300...   use the following operation

(a > 300.0)

Save the result as a grid rather than a image. It works for me....
Brent

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