[talk-au] Invisible POI's

[John Smith]

2010/1/3 Richard Colless <firefly at ar.com.au>:
> During this job, I noticed some interesting POI's. Just North of Murrurundi,
> there is a speed camera that someone has added. It's visible when in Edit

That would be my handy work :) I've marked in quite a few I had co-ords for...

> mode (Potlatch or JOSM), but doesn't show in the View mode. It also didn't
> appear on my Garmin when I approached it.

No idea how to get these show up on garmin's, although I'm guessing as
some kind of POI that will give you warnings when you are coming close
to them.

> The speed camera is just north of the Pages River Caravan Park (very nice
> park, we can recommend it to visitors). Surely a speed camera is something
> you would want to show up on your GPS. Is there anything that can be done to
> make it appear?

Speed cameras are a bit of a mess tagging wise, some add a node others
add a relation, but I don't think any method renders on OSM...

http://wiki.openstreetmap.org/wiki/Proposed_features/Speed_trap
http://wiki.openstreetmap.org/wiki/Proposed_features/Relation:enforcement
http://wiki.openstreetmap.org/wiki/Proposed_features/Traffic_enforcement
http://wiki.openstreetmap.org/wiki/Road_Signs

etc...

> Shell service station that I added. What's different about a speed camera?
> Or, for that matter a feature tagged as "cave_entrance" - they don't show up
> in View mode either?

You are talking tagging v rendering, not everything tagged is
rendered, because the amount of things that could be possibly tagged
is almost limitless, but you really don't want everything showing up
on a map, and it doesn't look like anyone has asked for speed cameras
to be rendered.

Usually having this information to give you an audible warning would
be better than a visual warning, since you don't have to look away
from the road :)

The other very useful thing is to tag maxspeed=* limits, although I
noticed a couple of speed_camera tags tagged with the speed limit
also...