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List:       qgis-user
Subject:    RE: [Qgis-user] Data-defined rendering of rotated ellipses
From:       "Peter Bange" <P.Bange () ecofys ! com>
Date:       2009-04-22 14:26:40
Message-ID: 0AC0094540D4854BAD793E507E31D332735E8A () nl00-mail ! Econcern ! Corp
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I draw wind arrows with different sizes and rotation using a function I
defined in the postgres database. Problem with that is that when you
zoom into the map, the arrows will grow too ... For my purpose that is
no problem, but for you it might be.

Peter Bange

-----Original Message-----
From: qgis-user-bounces@lists.osgeo.org
[mailto:qgis-user-bounces@lists.osgeo.org] On Behalf Of Andreas Neumann
Sent: woensdag, april 22, 2009 2:07 PM
To: qgis-user
Subject: [Qgis-user] Data-defined rendering of rotated ellipses

Hi again,

For my same waste-water project I need to render ellipses based on
attributes. Two attributes define the two-half-axis of the ellipse,
another attributes define the rotation. These ellipses represent manhole
points in the waste-water network.

I know how to define the rotation of symbols - but is there a way to
render ellipses based on the two half-axis?

Are there any ideas?

If not - I think I will create SVG symbols and classify the different
sizes into different ellipse-symbols and apply the rotation.

Thanks,
Andreas


-- 
Andreas Neumann
http://www.carto.net/neumann/
http://www.svgopen.org/

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