Cannot render SVG images using python-mapnik.

[vipul]

• Below is the code of discussion. (Context: built and installed mapnikv3.1.0, python-mapnikv3.0.x for simple map generation)

img = mapnik.Image(width_pixels, height_pixels)
mapnik.render(m, img)

return img.tostring(image_format), image_format

• The code works fine when generating jpeg, png, tiff and webp images. But during the generation of SVG images below error pop up.

return img.tostring(image_format), image_format
RuntimeError: unknown file type: svg

• I think that there is some kind of plugin needed for svg formats but I have installed cairo for that purpose only, it doesnot solve the problem.
• Suggest a solution either involving any change in my code or installation of new plugins of mapnik.

[Lars Marius Garshol]

It's not enough to install Cairo. You both mapnik and python-mapnik must be built with HAVE_CAIRO.

You can try calling mapnik.has_cairo() and mapnik.has_pycairo() to see what they say.