[mkgmap-dev] mkgmap-dev Digest, Vol 153, Issue 40 Resolution 23 raster problems

Tue May 4 13:33:02 BST 2021

Hi Felix,

it probably depends on the --levels option, means, how many levels you put into a gmapsupp.

And yes, I don't have a clear idea how to detect parallel lines which will / should collapse into one line.

Gerd

________________________________________
Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Felix Hartmann <extremecarver at gmail.com>
Gesendet: Dienstag, 4. Mai 2021 13:19
An: Development list for mkgmap
Betreff: Re: [mkgmap-dev] mkgmap-dev Digest, Vol 153, Issue 40 Resolution 23 raster problems

Wow - looks really good. The main problem I feel is now that sometimes highways you can see both directions apart - while before this was less rare - or lost in the jaggedness.

--x-simplify-filter-line-errors=23:3.6,22:4.2,21:5.4,20:6,19:7,18:7.5,16:8,15:9 --x-simplify-filter-polygon-errors=23:4.6,22:7,21:8,20:9,15:10 --polygon-size-limits=24:16,23:14,22:12,21:11,20:10,19:9,18:8,17:7,16:6,15:5,14:4,13:3,12:2,11:0,10:0
seems to give pretty nice results - and much faster on my Garmin 600 at lower resolutions.

I guess those highways with dual directions are much harder to solve...

On Tue, 4 May 2021 at 17:24, Gerd Petermann <gpetermann_muenchen at hotmail.com<mailto:gpetermann_muenchen at hotmail.com>> wrote:
Hi Felix,

OK, I am happy to hear feedback regarding the latest changes the branch. Next planned step is to check if the simplify4.patch still improves things and maybe improve it further.

Gerd

________________________________________
Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk<mailto:mkgmap-dev-bounces at lists.mkgmap.org.uk>> im Auftrag von Felix Hartmann <extremecarver at gmail.com<mailto:extremecarver at gmail.com>>
Gesendet: Dienstag, 4. Mai 2021 11:03
An: Development list for mkgmap
Betreff: Re: [mkgmap-dev] mkgmap-dev Digest, Vol 153, Issue 40 Resolution 23 raster problems

well I never got the merge-more patch actually running as together with simplify v4 it did not change anything for me. I'm waiting for updates on the new branch to test things.
I still feel level>=1, the higher the level the less exact it needs to be. It just needs to be small and beautiful from resolution 21 and lower. While actually driving/riding/walking you will always use 24-22 (even 22 only in car I feel. Maybe 21 on highways).

Those levels are important on PC and GPS device for orientation. And while actual switchback turns on a road would be quite worthwhile, those zig zag things aren't.

_______________________________________________
mkgmap-dev mailing list
mkgmap-dev at lists.mkgmap.org.uk<mailto:mkgmap-dev at lists.mkgmap.org.uk>
https://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev

--
Felix Hartman - Openmtbmap.org & VeloMap.org