[Qgis-user] Clipping a Raster with a Mask Layer

Randal Hale rjhale at northrivergeographic.com
Fri Oct 7 06:27:32 PDT 2016


I've tried this on:

  * 2.14.6 on Windows
  * 2.16.3 on Linux
  * Master on Linux

Dropbox Link: 
https://www.dropbox.com/sh/zg8miobad8ax0ef/AABXzPzTd8920I248_IprKjba?dl=0

I have a raster and polygons. All matching in projection. M one worry is 
the raster is a float32 tiff and something it wrong with it. I didn't 
create the raster but I am trying to help someone work their way through 
this exercise for a College Class.

When I use the processing tool to clip the raster with the vector I get 
an output image that in the legend shows the values as being nan - which 
I guess is null. No matter what I do - there is no clip. Just a large 
image that is black or nan (null).

Thoughts? I'm stuck. I don't know if I'm seeing a bug or I've got a bad 
image. The person originally working through this said it all works 
correctly with 2.8 (but I haven't attempted that version as of yet).

Randy

-- 
------------------------------------------------
Randal Hale
North River Geographic Systems, Inc
http://www.northrivergeographic.com
423.653.3611 rjhale at northrivergeographic.com
twitter:rjhale     http://about.me/rjhale
http://www.northrivergeographic.com/introduction-to-quantum-gis
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