I guess what you are referring to is that in ArcGIS you can link
attribute tables to rasters, and subsequently use any column to define
the legend. There have been feature requests for this in QGIS, but it
has not been implemented yet as far as I know.
It is however fairly easy to define the legend (color and labels) for a
raster using a QGIS colour file. This is a simple comma delimited value
(csv) file with raster id, R, G, B color values and label. One option is
to have an spreadsheet with your attribute tables and generate the color
files text file, which you can then load in QGIS, as described here
(https://pvanb.wordpress.com/2014/02/05/creating-a-qgis-color-map-from-text-file/).
Obviously you can achieve the same using different tools, e..g, R.
Regards
Paulo
On 30-10-15 01:02, Inna Nogeste wrote:
Thanks Damien,
For the purposes of the product that I'm working on the preference is
for the data to be maintained as a raster.
I've been using QGIS to test cartographic design and Map Server export
(plugin) functionalities. It's worked fine for the data I've been
given and what I've wanted to achieve except for the land use raster.
I've needed to use ArcMap for the landuse raster data.
The MapServer plugin isn't working in QGIS 2.10 Pisa but was working
in QGIS 2.8.
Regards,
Inna
(I've removed your screen grab from an earlier email as I keep on
getting messages saying that this message is too big for this listing
so don’t know if any of the QGIS developers have seen this query).
*From:*Damien Stephens [mailto:[email protected]]
*Sent:* Wednesday, 28 October 2015 6:18 PM
*To:* Inna Nogeste
*Cc:* [email protected]
*Subject:* RE: QGIS- How to render a raster using a field other than
Value [SEC=UNCLASSIFIED]
At this point my only suggestion is to convert the raster to polygons.
Hopefully the text is maintained.
Could you send a clipped version of the raster to confirm?
Thanks
damien
*From:*Inna Nogeste [mailto:[email protected]]
<mailto:[mailto:[email protected]]>
*Sent:* Wednesday, 28 October 2015 2:29 PM
*To:* Damien Stephens; [email protected]
<mailto:[email protected]>
*Subject:* RE: QGIS- How to render a raster using a field other than
Value [SEC=UNCLASSIFIED]
Thanks for the suggestion. I've looked at it. Band = Band 1 (Gray) and
there is no option to select a field or even input Values.
It would be good if QGIS could have the option of selecting a field to
symbolise as this would be useful in raster data such as land use.
Inna
*From:*Damien Stephens [mailto:[email protected]]
*Sent:* Tuesday, 27 October 2015 12:08 PM
*To:* Inna Nogeste; [email protected]
<mailto:[email protected]>
*Subject:* RE: QGIS- How to render a raster using a field other than
Value [SEC=UNCLASSIFIED]
Ah ok the text field may cause a problem.
I don’t have any rasters with text values to test. What happens when
you try the paletted render type with text in the band rendering tab
on the layer properties dialogue?
Cheers
Damien
*From:*Inna Nogeste [mailto:[email protected]]
<mailto:[mailto:[email protected]]>
*Sent:* Tuesday, 27 October 2015 7:34 AM
*To:* Damien Stephens; [email protected]
<mailto:[email protected]>
*Subject:* RE: QGIS- How to render a raster using a field other than
Value [SEC=UNCLASSIFIED]
Hi Damien,
Thanks for your reply.
I am working with land use raster data which only has 1 band.
The values in the Value field have been attributed to a landuse (as a
text attribute) in a newly created field which is what I want
symbolise. In ESRI ArcMap, I can select whatever Value Field I want
from a drop down list of fields in the raster data. It would be good
to have a similar function in QGIS.
Inna
*From:*Damien Stephens [mailto:[email protected]]
<mailto:[mailto:[email protected]]>
*Sent:* Wednesday, 14 October 2015 6:37 PM
*To:* Inna Nogeste; [email protected]
<mailto:[email protected]>
*Subject:* RE: QGIS- How to render a raster using a field other than
Value [SEC=UNCLASSIFIED]
If your raster has more than one value field (band) it should be
pretty simple. The band rendering tab on the layer properties dialog
lets you chose the band to colour.
In the attached screen grab I have chosen band 1 using a singleband
pseudocolour render.
Hope that helps.
*From:*Qgis-user [mailto:[email protected]]
<mailto:[mailto:[email protected]]> *On Behalf Of
*Inna Nogeste
*Sent:* Wednesday, 14 October 2015 2:13 PM
*To:* [email protected] <mailto:[email protected]>
*Subject:* [Qgis-user] QGIS- How to render a raster using a field
other than Value [SEC=UNCLASSIFIED]
I would like to render my raster using a field that is not the Value
field. Is it possible to do this in QGIS? This is easily done in ESRI
ArcMap.
I have access to both QGIS 2.10 and QGIS 2.8.
Regards,
Inna Nogeste | Spatial Information Specialist
Environmental Information Management
Data Management
Geospatial Data and Access Unit
Bureau of Meteorology
www.bom.gov.au <http://www.bom.gov.au/>
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