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I want to create some svg symbols for Qgis using Inkscape, those symbols must have attributes as described in the question. For the last two days, I have been experimenting as instructed by Sourcepole and mimicked some symbols came bundled with qgis that have desired attributes without any success.

Finally I experimented with the simplest form of symbol: I created an svg that contains only a circle in Inkscape and tried to modify it.

The original file (circle.svg) have this line:


I modified it into:

   style="fill:param(fill) #ffffff;fill-opacity:1;stroke:param(outline) #000000;stroke-width:param(stroke-width) 1.01988637;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"

Saved as circle_modified.svg and selected it as point symbol, but Qgis couldn't change all three parameters at the same time.

What did I do wrong or should do differently?

My system: Qgis 1.8.0 on Ubuntu 12.04 64 bit, Inkscape 0.48, Gedit 3.4.1 text editor.


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2 Answers 2

To create SVG symbols with modifiable fill color, stroke color and stroke width in QGIS, you should replace the style attribute from the path element with these 3 attributes:

  • fill="param(fill) #FFF"
  • stroke="param(outline) #000"
  • stroke-width="param(outline-width) 1"

If you are using InkScape, after writing the new SVG file, edit the file and replace the entire line beggining with style:


with the following line:

fill="param(fill) #FFF" stroke="param(outline) #000" stroke-width="param(outline-width) 1"
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I've also wanted to do this since finding out how to add SVG symbols yesterday, but they were all black. The answer given by jgrocha works - I wanted to vote it up but having just joined the GIS forum, I need to get some reputation first!

I also found this page which confirms the answer: SVG SYMBOLS IN QGIS WITH MODIFIABLE COLORS

To have the possibility to change the colors of the marker, we have to add the placeholders ‘param(fill)’ for fill color, ‘param(outline)’ for outline color and ‘param(outline-width)’ for stroke width. These placeholders can optionally be followed by a default value:

<svg width="100%" height="100%">
  <rect fill="param(fill) #ff0000" stroke="param(outline) #00ff00" stroke-width="param(stroke-width) 10" width="100" height="100">


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