August 2024 - mkgmap-dev - The mkgmap lists

Problem in AngleFixer?
by Gerd Petermann 15 Dec '24

15 Dec '24

Hi all, in a private email Thorsten Kukuk contacted me about wrong turn instructions a sharp angles. An example is the node https://www.osm.org/node/27550903 A route coming from South that follows the way https://www.osm.org/way/36138336 at this junction should NOT produce a turn instruction. A route that turns left SHOULD produce a turn instruction. With current mkgmap it's vice versa and thus not OK. I thnk the current code in AngleFixer.java is too agressive as it tries to enlarge the angles so that a compact format can be used to write the heading values of the arcs at the mentioned node. It does this by changing the heading values of both arcs with go to the north. @Ticker: The code was introduced with your arcHeading_v2.patch, but maybe it existed before. Can you explain why the constant AngleChecker.SHARP_DEGREES is set to 46° instead of maybe 22.5° ? Gerd

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Commit r4922: improve AngleChecker to fix wrong or missing routing hints where roads are spltting or crossing at sharp angles.
by svn commit 31 Aug '24

31 Aug '24

Version mkgmap-r4922 was committed by gerd on Sat, 31 Aug 2024 improve AngleChecker to fix wrong or missing routing hints where roads are spltting or crossing at sharp angles. Patch AngleChecker_v6.patch by Ticker Berkin http://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=4922

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AngleChecker and --cycle-map option
by Ticker Berkin 23 Aug '24

23 Aug '24

Hi Gerd I'm confused by some logic in imgfmt/app/net/AngleChecker.java and wondered if you could help. If not a cycle-map, sharpAnglesCheckMask is set to ACCESS...BIKE = 0x2 (~line 134) Later (~line 294) when the code is looking at an angle and the arcs either side it ignores a sharp angle (ie won't try and expand it) if BIKE access isn't common to both arcs. This could result in time penalties for cars based If it is a cycle-map, sharpAnglesCheckMask is set to all but ACCESS...FOOT, so that if the common access of the arcs is FOOT only, sharp angles will be ignored, but there is logic to do this anyway. Ticker

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Patch to add AppStream metadata
by Sebastiaan Couwenberg 22 Aug '24

22 Aug '24

Petter Reinholdtsen provided a patch in Debian Bug #1078746 to add AppStream metadata for mkgmap. " Here is a patch to add Appstream metainfo XML announcing the hardware handled by this package. Including this information in the package will ensure programs mapping hardware to packages using Appstream information, like the isenkram package, will know that this package is useful on machines where the hardware is discovered. The appstream metadata file can be checked using this command after package build: appstreamcli validate-tree --no-net --explain debian/mkgmap " https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1078746 Kind Regards, Bas -- GPG Key ID: 4096R/6750F10AE88D4AF1 Fingerprint: 8182 DE41 7056 408D 6146 50D1 6750 F10A E88D 4AF1

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