Follow-up Comment #4, bug #17760 (project freeciv):

I found GEOC, GEOCANVAS and CRCANVAS. Retained mode 2D drawing libraries for
geographic or general purpose rendering.

http://geocanvas.sourceforge.net/

Only problem (maybe) are Python wrappers, but I don't know if these are
necessaries.

I read on stackoverflow these questions: 

1. displaying tiled map in Gtk+ app
(http://stackoverflow.com/questions/3622999/displaying-tiled-map-in-gtk-app)

2. What is the most performant way to implement zoom to a cairo-drawn canvas?
(http://stackoverflow.com/questions/6049208/what-is-the-most-performant-way-to-implement-zoom-to-a-cairo-drawn-canvas).

3. Transforming verticies with center point and scale factor?
(http://stackoverflow.com/questions/3588848/transforming-verticies-with-center-point-and-scale-factor)

4. scale surface without blurring it
(http://stackoverflow.com/questions/6743610/scale-surface-without-blurring-it)

I hope that these links are useful.

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