Wikipedia:Graphics Lab/Resources/QGIS/Create a topographic background: Difference between revisions
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'''Concept:''' Use an elevation GIS file, a discrete black & white colormap, and the Print composer to output one 1500px/1500px black & white png for each altitude (0m, +200m, +500m, etc, name the png accordingly!). This by a cycle such as 1. editing the map color, 2. actualizing the Print composer, 3. outputting the new png. Then use Inkscape to vectorize : load all png, align them, vectorize each using 2 colors + delete background. Color each vector polygon level (0m, 200m, ...) as need.<br />
;Introduction
QGis can convert raster polygons into vector polygons (''raster > polygonizer''). It does contours too, which have no fill, and so you must use ''vector > geometry > lines to polygons'' in order to fill them up.
;QGis cycles
;Inkscape cycles
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