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<div dir="auto">Peter Elderson wrote:<br />
> I am interested... can you tell me in laymen terms how the <br />
> relations are used in rendering and routing?<br />
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Sure. For rendering, the main tasks are showing a route highlight (OpenCycleMap shows this as a solid semi-transparent line, cycle.travel shows it as a series of dots), and showing route 'shields' for refs and/or names. This can require some clever cartography where routes overlap, especially when using transparency.<br />
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For routing, many cycle routers will give a preference (=improved weighting) to a road/path that's part of a route relation. This is partly because the road/path has (presumably) been reviewed and found good for cycling, and also because users often want to follow a signposted route. If the router offers turn-by-turn directions, the route relation's ref and name might be incorporated in the directions.<br />
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There are more nuances than that, of course, but that's pretty much the meat of it.</div>
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<div class="matchFont">Richard</div>
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