On Tue, Jun 08, 2010 at 10:57:58PM +0100, Dave F. wrote:
I don't know. Ice roads If you mean roads with ice on them then, well... all roads get icy.
I mean lakes with 20+ cm ice cover on them so that you can drive even heavy trucks over them for a few months in the winter. They would be ploughed too. Some are several km long, some are much shorter. There is one across this water: http://www.openstreetmap.org/browse/way/18738651 but the ways (even to the coast) have not been surveyed yet. Outside winter, you would have to take the boat or a detour.
If you mean bridges that raise up to allow traffic to go underneath then no, it's not - it's always a lift bridge.
Some lift bridges are almost stationary. This one is raised every 10 or 20 years for maintenance: http://www.openstreetmap.org/browse/way/4727228 The lift bridge section, the barriers or the control/machine room building have not even been marked in OSM.
Have you heard of Garbage In, Garbage Out? If the tags put into in OSM are inaccurate then the info going into any program, including mkgmap, is going to be garbage.
Sure, I have heard of it, and I have no trouble editing obviously wrong map data, using common sense of how things usually are built in my country.
The best I can think of at the moment is to tag is as a highway, which is what most people will regard it as, but with barriers at the relevant points that have access=* tags & any timings that are available.
I would not map 'mobile' objects (other than gates and such, which are attached to some rail fixture or a pivot point). For example about here http://www.openstreetmap.org/browse/node/285878811 there is a connection between the highway=trunk and highway=secondary that is blocked by a wall of conrete blocks. This would be near the NE of the temporary runway. There is another similar connection at the SW end, between the highway=motorway and the highway=secondary. For the duration of an exercise, the concrete blocks would be moved across the ref=5 motorway or trunk road, diverting cars to the highway=secondary ref=140. BTW, the motorway lanes that are tagged oneway are not separated by a greenfield, but the whole area has been paved. I don't think that the aeroway is completely wrong, but I agree that ways can't be highway and aeroway at the same time. One idea could be to define a relation on the ways (in the original problem, a highway=service loop and the straight section of highway) to mark the temporary air force base. I will seek for feedback on the Finland forum. Marko