[talk-ph] Tagging bridges and tunnels

Pierre Béland pierzenh at yahoo.fr
Thu Feb 19 01:33:12 UTC 2015

Hi Ronny,
I thought of using the new itinary calculation crossing the  Abacan bridge. I can see from the map in this area that in Philippines, like elsewhere, ref tag is used for roads (here ref=R-9).See the link for the itinaryhttp://www.openstreetmap.org/directions?engine=osrm_car&route=15.1682%2C120.5893%3B15.1426%2C120.5962#map=15/15.1554/120.5929
With OSRM, it does show the ref-R-9 but do not report bridge crossing. With Mapquest, there is even less info.
I wonder if OSMAnd on Android or any other road calculation software would report bridge crossing.

      De : Ronny Ager-Wick <ronny at ager-wick.com>
 À : Eugene Alvin Villar <seav80 at gmail.com>; Pierre Béland <pierzenh at yahoo.fr> 
Cc : OSM-PH <talk-ph at openstreetmap.org> 
 Envoyé le : Mercredi 18 février 2015 20h18
 Objet : Re: [talk-ph] Tagging bridges and tunnels
 This is a good point Eugene, and in fact the bridge names are very good landmarks, given that there are not many other signs on the roads in the Philippines, especially in rural areas. Another thing to take into consideration is that many bridges gain their name from the river they cross over, so there may be many bridges with the same name. They are definitely not tagged consistently at the moment, for example:
 If I remember correctly, they are both named Abacan Bridge, but only one of them has that name on the map, and incidentally the one with a different road name on each side does not.
 Do you know if common routing software will pick up the bridge:name=* tag?
 Yes, I know we're not supposed to tag based on what current software will pick up, but it is interesting to know, given that bridges are such great landmarks.
 It would be great with a published suggested standard that fits the Philippine conditions.
 On 2015-02-19 08:08, Eugene Alvin Villar wrote:
    Hi Pierre,
  Most bridges here in the Philippines have names no matter how small. You can usually spot their name on the guard rail or on a small sign just before the bridge. These names are almost always accompanied by the maximum load the bridge can handle (which is tagged using maxweight=*) and sometimes  with the distance from the island's zero-kilometer marker (I have no idea how to tag these. Maybe distance=*?).
  Some examples:
 On Thu, Feb 19, 2015 at 1:59 AM, Pierre Béland <pierzenh at yahoo.fr> wrote:
  I expect that only the major bridges have name. And we generally refer to these by their name and not the road reference. Unless you have  particularities in Philippines. Example Golden Gate Bridge in San Francisco bay. OpenStreetMap | ‪Golden Gate Bridge‬ (‪52477381‬)
      De : Eugene Alvin Villar <seav80 at gmail.com>
 À : Ervin Malicdem <schadow1 at gmail.com> 
 Cc : OSM-PH <talk-ph at openstreetmap.org> 
 Envoyé le : Mercredi 18 février 2015 12h35
 Objet : Re: [talk-ph] Tagging bridges and tunnels
      Hi Ervin,
  Option 1 is what I do.
  Take note that if we have a way with highway=something and bridge=yes, then the object is primarily a highway/road and the bridge is only an aspect or property of the highway/road segment. Therefore, the name=* tag should be the name of the highway/road. And then put the name of the bridge on the bridge:name=* tag.
  Besides, it will be very weird to have a long highway with unconnected names just because there are bridges along the highway.
 The only time I would put the name of the bridge on the name=* tag is if the roads from both ends of the bridge have different names. For example, the bridge formerly called Del Pan in Manila: www.openstreetmap.org/way/4304674
 On Wed, Feb 18, 2015 at 5:34 PM, Ervin Malicdem <schadow1 at gmail.com> wrote:
       Query regarding tagging bridges.
  What is the appropriate way of tagging bridges?
  Option1: Use the name of the road, and place the name of  the bridge under bridge:name or the name of the tunnel under tunnel:name
  Option2: Use the name of the bridge/tunnel, omit the road  name
       Ervin M.
 Schadow1 Expeditions - A Filipino must not be a  stranger to his own motherland.  http://www.s1expeditions.com             
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