Hello QGis developers, In one of my QGis projects the mapstyle is using map units (meter, epsg:3857) to style roads. But the lines are looking somehow blurred. On nearly horizontal or vertical lines, you can also see hachures. I collected some images [1].
The results are consistent, whether I view it in QGis desktop, the result as an WMS request from QGis Server or as output from QGis composer. In a discussion on German FOSSGIS list [2] there was a hint that using a other unit in mapstyle e.g. millimeters, the result should look better. And indeed, if the lines are at least 1 pixel, the rendered image is looking much better. How does the QGis rendering engine compare to MapServer or Mapnik in regards of smooth rendering, anti-aliasing, sub-pixel-rendering? I know MapServer and Mapnik are using AGG [3] for rendering. QGis is using QT. Are there any options, either in QGis or QT, I can play with to influence the render quality? Would QGis in general be able to render objects with tiny pixel width? Should I prefer millimeter over mapunits is my map styles from now on? I'm using QGis 2.18.13 on linux/ubuntu, but also latest QGis3 is showing the same result. Thanks for listening, Lars [1] https://imgur.com/a/QINrq [2] https://lists.fossgis.de/pipermail/fossgis-talk-liste/2017-October/008843.html [3] http://www.antigrain.com/ _______________________________________________ QGIS-Developer mailing list [email protected] List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
