[Qgis-user] QGIS Master and Rasters to grayscale

Tue Jun 19 04:42:26 PDT 2012

This does make what was a very simple thing to do in 1.8 more time consuming in 1.9 doesn’t it? All I want to do is just turn it grayscale for display purposes. In 1.8, all I do is select grayscale from the colormap drop down and push OK and QGIS does it for me. Am I missing something?

James 

From: Marco Hugentobler [mailto:marco.hugentobler at sourcepole.ch] 
Sent: 19 June 2012 10:49
To: James Stott
Cc: qgis-user at lists.osgeo.org
Subject: Re: [Qgis-user] QGIS Master and Rasters to grayscale

>I have included links to two example jpgs to show what happens. 1.9.jpg shows what happens when I use the method detailed below.

Is it a raster with integer values (but without color table)? In that case, switch the renderer type to singleband pseudo color and insert the color for each value.

Marco

Am 19.06.2012 11:18, schrieb James Stott: 

I have included links to two example jpgs to show what happens. 1.9.jpg shows what happens when I use the method detailed below.

I would like the raster to display as in the 1.8 jpg.

QGIS 1.8 https://docs.google.com/open?id=0B6r5nAOdEBZrSjhyaHdoUW9LY0U

QGIS 1.9 https://docs.google.com/open?id=0B6r5nAOdEBZrLUJ1dDNNM3BJZVE 

James Stott BSc (Hons) MSc | Senior Professional
Nicholas Pearson Associates | 30 Brock Street | Bath | BA1 2LN
T: 01225 445548 | M: -
www.npaconsult.co.uk <http://www.npaconsult.co.uk/>  

From: qgis-user-bounces at lists.osgeo.org [mailto:qgis-user-bounces at lists.osgeo.org] On Behalf Of Marco Hugentobler
Sent: 19 June 2012 09:49
To: qgis-user at lists.osgeo.org
Subject: Re: [Qgis-user] QGIS Master and Rasters to grayscale

Hi James

You may go to the raster properties, select render type singleband gray. Then select contrast enhancement 'stretch to min/max' and click on 'load' to get the min/max values from the datasource.

Having this by default (options page) is not yet available with the new raster classes. A bugticket is already filled.

Regards,
Marco

Am 19.06.2012 10:17, schrieb James Stott: 

I sometimes display my Ordnance Survey rasters  as single band gray to allow my data to show more clearly over the top of it.

In the new master I cannot achieve the same effect. My raster goes solid grey.

Old settings:

Render as: Single Band gray

Single band properties – gray band: Band 1

Single band properties – color map: grayscale

New settings:

Render type: Singleband gray

Gray band: Palette

Contrast enhancement: No enhancement

How do I achieve the same effect as before? The raster displays fine in colour, just not in grayscale. I am guessing it’s down to the new raster properties in master.

James Stott BSc (Hons) MSc | Senior Professional
Nicholas Pearson Associates | 30 Brock Street | Bath | BA1 2LN
T: 01225 445548 | M: -
www.npaconsult.co.uk <http://www.npaconsult.co.uk/>  

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James Stott BSc (Hons) MSc | Senior Professional
Nicholas Pearson Associates | 30 Brock Street | Bath | BA1 2LN
T: 01225 445548 | M: -
http://www.npaconsult.co.uk/ 
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-- 
Dr. Marco Hugentobler
Sourcepole -  Linux & Open Source Solutions
Weberstrasse 5, CH-8004 Zürich, Switzerland
marco.hugentobler at sourcepole.ch http://www.sourcepole.ch
Technical Advisor QGIS Project Steering Committee

-- 
Dr. Marco Hugentobler
Sourcepole -  Linux & Open Source Solutions
Weberstrasse 5, CH-8004 Zürich, Switzerland
marco.hugentobler at sourcepole.ch http://www.sourcepole.ch
Technical Advisor QGIS Project Steering Committee
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