[Routing] Add Routing-Guide to Wiki

[Marcus Wolschon]

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Hi,

I'm Marcus from Traveling-Salesman.
I would like to add a "Routing-Guide"
to the OSM-Wiki answering the basic
questions that come up when you try
to interpret the OSM-data for routing.

What do you think needs to be included?

example:

Oneway:
 All segments are oneway that have a way
 on them that is oneway.
 A way is oneway if and only if:
     (case is not relevant)
   * "oneway"="yes" or
   * "oneway"="true" or
   * "oneway"="1" or
   * "junction"="roundabout"or
   * "highway"="motorway" or
   * "highway"="motorway_link"

Name:
 The following tags may contains the name
 of a street:
 * "name"
 * "name:<2digit-language-code"
 * "ref"
 * "nat_ref"
 * "loc_ref"
 * "int_ref"

is_in:
 A way is in a city/suburb/zip-code/...
 if and only if:
 * it is inside an area tagged as
   "place"=
 * it is not inside such an area but
   the nearest point tagged as
   "place"= is less then XX km away.

The default maximum-speed if not given by
    "maxspeed"=<number> is:
 * Germany
    Outside a city-area
      "highway"="motorway" - unlimited
      "highway"="trunk","trunk_link",.. - 100 Km/h
      "highway"= "residential" 50Km/h
    Inside a city-area
      default: 50Km/h
 * France
 * ...

Marcus
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