[talk-ph] changes of raod types
maning sambale
emmanuel.sambale at gmail.com
Sat Jan 23 04:05:02 GMT 2010
> Using type "road" causes 3 problems.
>
> 1 The road type is not recognised by JOSM (so it reports errors)
> 2 Roads of type "road" are not rendered on maps, so I have had to fix roads where someone has traced a road using the SPOT5 data, thinking that the road was not already in the database, causing the road to be entered twice. Wasting peoples time and effort.
It does rendered at higher zoom level as dark grey roads.
> 3 Routing software will not recognize the roads, and so won't route along them. I would rather travel along an incorrectly classified road, rather than have no route to a destination.
That was really my intention, I use the tag highway=road to explicit
define roads I simply traced with satellite images without any local
knowledge. I sometimes add a note tag saying this road should be
verified. This is what most contributors did in the first pass of
edits in Pangasinan.
http://osm.org/go/4zbZ07W--
A local should then re-tag this road to match what's on the
ground,which is what user:bibinka of pangasinan is doing. If we
simply re-tag them without local knowledge, it is even more dangerous.
Moreover, there is a sense of 'completeness' when roads are tagged
with arbitrary classes without ground verification. Data users (like
garmin gps users) might assume since if it was tagged as
residential/unclassified, the data was verified. In my garmin maps, I
add a fixme label to highway=road to provide caution to users.
If you notice, I've been tagging most roads with spot5 with
highway=road except in areas I'm familiar with.
http://www.openstreetmap.org/browse/changeset/3672495 :)
--
cheers,
maning
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"Freedom is still the most radical idea of all" -N.Branden
wiki: http://esambale.wikispaces.com/
blog: http://epsg4253.wordpress.com/
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