[mkgmap-dev] Commit r3691: preserve_v2.patch: reduce distortion at lower zoom levels

Version mkgmap-r3691 was committed by gerd on Thu, 04 Aug 2016 preserve_v2.patch: reduce distortion at lower zoom levels improve the routines which preserve points so that the line simplification (DouglasPeuckerFilter) doesn't remove points which are important for correct rendering Expected effects: . fewer distored polygons and lines at resolutions below 24, esp. where different lines or polygons share points (e.g. white triangles in the sea or unconnected T-junctions visible in GPSMapEdit) - slightly increased img size http://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=3691