<div dir="ltr"><div><div><div>Hello again,<br><br></div><div>As I was studying my previous topic here, I discovered that OSRM is now supporting two undocumented tags, by HOT's request: impassable=yes and status=impassable (<a href="https://github.com/DennisOSRM/Project-OSRM/commit/99e9d0d0230789b24df656435a4245edb57b4dac">https://github.com/DennisOSRM/Project-OSRM/commit/99e9d0d0230789b24df656435a4245edb57b4dac</a>). I believe the HOT team is using OSRM for emergency aid, so this may have been an urgent request.<br>
</div><br></div>From the documented life cycle approaches (<a href="http://wiki.openstreetmap.org/wiki/Comparison_of_life_cycle_concepts">http://wiki.openstreetmap.org/wiki/Comparison_of_life_cycle_concepts</a>), what OSRM was requested to support seems to correspond to the 1st (<status>=yes) and the 4th (life_cycle=<status>) approaches. Yet, the last time I talked about life cycle here (2013-09-28, on
abandoned hiking trails), I felt that the 3rd approach
(<status>:<key>=<value>) had most support.<br><br></div><div>This guide encourages the former method (4th approach): <a href="http://wiki.openstreetmap.org/wiki/Damaged_buildings_crisis_mapping">http://wiki.openstreetmap.org/wiki/Damaged_buildings_crisis_mapping</a><br>
<br></div><div>As well as encouraging 2 special life cycle tag values to the "building" tag (damaged and collapsed), so far still undocumented.<br></div><div><br></div><div>They may be doing so in order to work around having to adapt their rendering engine, which is quite understandable given the urgency of their work.<br>
<br>The 3rd approach would suggest using damaged:highway=[value] (which would make routers work correctly, but not renderers as they currently are) instead of highway=[value]+status=impassable (which makes unmodified renderers work perhaps "well enough" but requires routers to adapt).<br>
<br>Any thoughts?<br></div><div><div><div><div><br>-- <br>Fernando Trebien<br>+55 (51) 9962-5409<br><br>"The speed of computer chips doubles every 18 months." (Moore's law)<br>"The speed of software halves every 18 months." (Gates' law)
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