Okay I've done some comparisons between the two approximations. > For polygons the old version is much better because the patched version > creates bad artifacts. For streets at resolution 23 (if used) to 21 I > prefer it too. At resolution 20 I am indifferent and cannot really > decide what is better. However from 19 to x the approach as given by > the patch is far superior (drawing speed on GPS much higher, actually > using the normal DP filter maps become more or less unusable for > resolution 16,18 or 19 on etrex). > > Can someone see how this behaviour could be implemented for lines only > from resolution 20 or 19 downwards, while keeping the current approach > of the DP filter for the rest? > Thanks for intensively testing my old patches and the propose for them being checked in. Glad to see them work fine and beeing useful. :-)
I have looked at this patch again. I think your proposal of switching between them at a given resolution is a good one. This should preserve the accuracy at higher zooms and compress the data at lower zooms. Should be worth a try. I'm sorry, but at the moment I have no toolchain ready for compiling mkgmap and preparing patches. If I find the time, I will look into it the next days. Regards, Johann _______________________________________________ mkgmap-dev mailing list [email protected] http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
