Hi Steve, On Wed, 09 Dec 2009 10:27:33 +0000 Steve Hosgood <steve@tallyho.bc.nu> wrote:
Mark Burton wrote:
Hello all,
congratulations to your success with the unpaved bit.
Thanks Johann.
For the keyword I would use mkgamp:unpaved, as some others has suggested too. In my opinion most if not all tags used by mkgmap should start with this prefix and should be translated in the style file.
I agree. Therefore, I propose that we use:
mkgmap:unpaved to tag ways that are "unpaved"
mkgmap:ferry to tag ways that are "ferries"
Mapping from OSM tags can be done in the style file.
Is everyone happy with that? If so, I will make the change and commit it.
I disapprove.
The trouble with the "mkgmap:unpaved=???" approach is that it duplicates existing functionality in OSM. We should strive to get the existing functionality better specified if it doesn't already do the job for us. Otherwise, mapping effort will be spent on adding a set of tags to OSM which only benefit the Garmin routable maps project. What about the TomTom people? Or the AndNav2 users? They'll want to know about routeable or unrouteable unpaved roads too.
The whole point of using a mkgmap: prefix is that it does not force a particular OSM tag to be used for a garmin gps specific purpose. When an "approved" OSM tag (is there such a thing?) has a "meaning" that coincides with a garmin gps capability (e.g. oneway) then it makes sense for mkgmap's behaviour to be controlled by the OSM blessed tag. Otherwise, it's better not to pollute the OSM tag namespace or overload the meaning of existing OSM tags.
Unrouteable unpaved roads are a real-world fact, not a 'mkgmap' feature.
I do agree though that OSM's tagging for road surfaces is a bit of a mess, but it needs an OSM-level cleanup if that's a problem, not at mkgmap-level.
AFAIK there are "surface=???" "smoothness=???" "mtb:scale=???" "sac_scale=???" "rtc_rate=???" tags in OSM, all of which (sometimes in combinations) ought to be enough to give mkgmap the clues needed to set the routeability of a given way. Plus "access=???" and "<vehicle>=no" of course.
Not just that, but those tags already exist. We should be using them. Steve
Isn't that one job of the style file, to transform the OSMish tags into garmin specific tags? Cheers, Mark PS - I do now wonder if the carpool tag should be changed to mkgmap:carpool?