Z-data (or elevation data) isn't generally stored in OSM. It can kind
of work for points (especially peaks) but doesn't so much for ways.
Map renderings (e.g. OpenCycleMap.org) or routing (e.g.
CycleStreets.net) tend to supplement OSM data with SRTM data for
elevation. There's a lot of information and help available on mixing
SRTM with OSM.
http://wiki.openstreetmap.org/wiki/Srtm
Thanx Greg. IIRC, SRTM is raster data with a pixel with at best 90 X 90
m. Even if it were 30 X 30 m, it would still be quite coarse for a
running path. Strava.com is overkill for my needs. For the altitude,
all I'm interested in really is a way to tag altitudes to vertices of
locations I know and have them show up as a cross section. Thanx for
your pointers.
Yves
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