OpenStreetMap

Relations

Posted by wilda69 on 6 May 2012 in English (English)

Completing the "ref" statement in a relation is important when displaying a route (hiking/cycle/bus) on a GPS [as defined by "highway-symbol:" in the lines subfile]. There appears to be a 9 character limit to what can be displayed within a symbol. For this reason, I try to define a "ref" statement by not more than 3 characters, allowing for at least three different route refs to be displayed at the same time should a node have more than 1 relation.

Comment from Pieren on 8 May 2012 at 08:30

I don't know from where you get this limit of '9 characters' but this is surely not in OSM itself. You should not restrict your contributions for one particular application consuming the data (like a renderer or a GPS or smartphone app). Put the refs as they have to be officially (and readable). Sizing on display has to be traited separately by the data consumer app in a later stage.

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Comment from bri g on 10 May 2012 at 23:33

It is tempting to contribute to OSM so that the data, your contribution will 'work' on your GPS / map / computer / browser etc, but Pieren is correct.

The data in OSM should be be the actual data, not a parsed / hacked version that will work on a particular application.

The Map should be factually correct so that applications can parse the data in a uniform way so that it can be displayed correctly on end user apps.

Keep up the good work and keep on collecting and entering the data

bri

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