On 07.12.2009 22:36, Mark Burton wrote:
Bloody typical, you wait around for ages hoping for a new routing capability to be added to mkgmap and then two come along on the same day.
I've been trying to discover how unpavedness is encoded for at least 6 months. Every now and again, I return to think about it some more. Check and re-check the same old data structures. Very frustrating, no progress. Damn those cunning bastards at Garmin....
However, a month or two ago, I discovered that Table C contains more than just turn restrictions. I still don't know many of it's little secrets but, today, having exhausted all other possibilities, I finally twigged that Table C contains the key to understanding "unpavedness". Gotcha!
The attached patch allows you to add either unpaved=yes/true/1 or paved=no/false/0 to a way and then it will be ignored for routing purposes when the GPS has been told to avoid unpaved roads.
Not sure if those are the best tags to use - any thoughts?
BTW - the unpaved road line type 0x0a has nothing to do with unpavedness, it's just a routable way that gets drawn as a dashed line (default rendering).
Feedback, etc.
Mark
I have problems compiling with that patch: compile: [javac] Compiling 317 source files to d:\Garmin\mkgmap_svn_trunk3\build\classes [javac] d:\Garmin\mkgmap_svn_trunk3\src\uk\me\parabola\mkgmap\osmstyle\StyledConverter.java:1418: illegal start of expression [javac] if(way.isBoolTag("unpaved") || way.isNotBoolTag("paved"))) [javac] ^ [javac] 1 error Will try again against a clean trunk but I am not using many patches currently (basicly only the blacklist/whitelist patch plus some simple value changes that should not affect anything). BTW I think the blacklist / whitelist tag file patch would be good to include as no-one noticed anything broken (I don't need it and just used it for testing - but I think it can be useful for some mapmakers).
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