[Qgis-user] labelling by attribute

[Tom Lennon]

Hi Lucas:
You can use the "data defined override" to set the text size based on your
classes.
Use the fancy "E" under Layer Properties > labels > size.
The program expects a number which will become the size.

If the class in your data base is called "class" and it happens to be a
number usable as the text size just put "class" in the override.

If "class" is a ranking number ( like 1 - 6, with 1 being the largest
population and 6 the least) then enter 13 - "class" in the override to get
7 for least and 12 for largest "class".

if "class" is a population number then enter a CASE expression like this:
CASE
WHEN  "class" > 1000000 THEN  12
WHEN  "class" > 750000 AND  "class" < 1000000 THEN  11
WHEN  "class" > 500000 AND  "class" < 750000   THEN  10
WHEN  "class" > 250000 AND  "class" < 500000   THEN  9
WHEN  "class" > 100000 AND  "class" < 250000   THEN  8
ELSE     7
END

The overrides can be used to also change font or type style based on data
values as well.


On Fri, Jun 19, 2015 at 5:52 PM, Fred Lali <lalifred at gmail.com> wrote:

> Lucas, just copy the same layer and paste in the same canvas n the label
> them with different fonts!
>
>
>
> For God and My Country
> Consultant in: GIS,Forestry and Environment @ Earth Consult(U) Ltd.
> CCRP GIS Support-Uganda
> (The MCKNIGHT Foundation)
>
> Rotarian at RC. Bweyogerere Namboole
> Mob: 0772/0752-841118
> Sent from Lumia Windows phone
> ------------------------------
> From: Luca Galuppini <luca.galuppini at gmail.com>
> Sent: ‎20/‎06/‎2015 00:28
> To: qgis-user at lists.osgeo.org
> Subject: [Qgis-user] labelling by attribute
>
> i'm sorry for posting a lot of newbie questions but tutorials are not so
> clear about this:
> i have to label a point feature with different font size or style
> depending on an attribute in the table (for example, i have cities grouped
> in classes by their importance, and i want the bigger cities to have bigger
> label size).
> this is really straight forward in arcgis but i really can't find this
> option in qgis 2.8.2, at least not in a place when one can find it easily.
> i expect i should have something similar to symbol by category, but
> nothing like that is in the label menu...
>
> _______________________________________________
> Qgis-user mailing list
> Qgis-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/qgis-user
>



-- 
tolennon at gmail.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20150619/05e26c14/attachment.html>