[Qgis-user] graduated symbols for point layers

[David Fawcett]

To me, I don't know if this is a bug or not, but it is definitely not
intuitive for new (or old) users...

On Mon, Nov 28, 2011 at 7:37 AM, Giovanni Manghi
<giovanni.manghi at gmail.com> wrote:
> This is tricky:
>
> if you select "advanced -> select scale field" *before* hitting
> "classify" then the size symbols won't be scaled.
>
> If you do the other way it will work as expected.
>
> cheers
>
> -- Giovanni --
>
>
> On Tue, 2011-11-22 at 09:03 -0600, David Fawcett wrote:
>> I can confirm that this is a problem in 1.8.0-Trunk.
>>
>> Graduated symbols used to 'just work', now they don't.  If they do
>> somehow still work, it is very unintuitive.  I recently tried to show
>> off some data using QGIS in a workshop that I was teaching.  I had
>> upgraded QGIS to show off the latest look and features.  It was
>> embarrassing when I couldn't do something simple like make graduated
>> size symbols...
>>
>> Here is the version that I am using (on Win32)
>>
>>
>> QGIS version
>> 1.8.0-Trunk
>> QGIS code revision
>> 33b7e31
>> Compiled against Qt
>> 4.7.1
>> Running against Qt
>> 4.7.1
>> GDAL/OGR Version
>> 1.8.1
>> GEOS Version
>> 3.2.2
>> PostgreSQL Client Version
>> 8.3.10
>> SpatiaLite Version
>> 2.4.0
>> QWT Version
>> 5.2.1
>> This copy of QGIS writes debugging outpute.
>>
>>
>> David.
>>
>> On Mon, Nov 14, 2011 at 10:06 AM, Caroline Rendon
>> <caroline.t.rendon at gmail.com> wrote:
>> > Hi Sake,
>> >
>> > This doesn't work for me. The symbols still appear in graduated colors, all
>> > the same size - and the size doesn't seem to change when I change the
>> > number, although it does between millimeters and map units. I'm sure there's
>> > just something I'm missing (I'm new to QGIS) but I can't figure it out.
>> > Thanks for your help!
>> >
>> > Caroline
>> >
>> > On Sat, Nov 12, 2011 at 3:08 AM, Sake Wagenaar <sw1234 at planet.nl> wrote:
>> >>
>> >> Hi Caroline,
>> >>
>> >> If you use new symbology, the option to scale point symbols is hidden
>> >> under the button 'Advanced'. With 'Size scale field' you can select a field.
>> >> Next you have to change 'Size', to give the symbols the size you want. If
>> >> the values are large, and you use millimeters, the symbols get much too
>> >> large, even if you use the smallest possible value for Size (0,01).  A
>> >> better option is to use map units.
>> >>
>> >> Sake Wagenaar
>> >>
>> >> Op 11-11-2011 23:08, Caroline Rendon schreef:
>> >>
>> >> Hi,
>> >> I'm trying to create graduated symbols for a point layer, and the only
>> >> option it will give me is by color, but I want graduated symbols by size. I
>> >> was only able to get the color to work with "old symbology" because in new
>> >> symbology the layer would just disappear altogether and I had to re-add it.
>> >> So in old symbology I can get dots of different colors but not different
>> >> sizes. Am I missing a plugin or something? I'm working in 1.7.1 on Win XP.
>> >> Thanks in advance for your help!!
>> >>
>> >> Caroline Rendon
>> >>
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