You could map them from a boat, from the banks, or from aerial photos.....

yeah, where a route is gone completely, rather than just being left in an abandoned state, such as if a junction layout changes (roundabout to traffic lights or vice versa are common) I have done as Kevin suggests - just adding a note to the way, and removing tags apart from a note, which will stop it getting re-added from an aerial photo. Might also be a good idea to include survey date, or date you know that the feature was changed if it is near you, to have some sort of historical data attached.

I'm not sure how much OCR'ing Google Streetview cars do - I know that some of the road names on google maps are wrong, even though the streets now have been streetview'd, passing correctly labelled signs on the way....

Well played... I've spent a couple of days mapping Stortford, though collected the streetnames the old fashioned way.... It's worth remembering that what open street view data doesn't do is provide all the estate alleyways which can only be mapped by surveys/gps.....

Sorry if I'm being thick, but where roundabouts are made up of more than one way (e.g. where there are bridges over roads), how would a routing programme know whether to turn left or right into the roundabout (given not all countries drive clockwise or anticlockwise).

Ta
Chris

You could try sending Al Silva a message to ask him? (o;

I've moved on to tracing hedges too.... I need to be saved, haha

Thanks all, I'll have a play with that... .map and .jpg are better for me than ozf3 anyway (o:

I guess it's similar to the criteria as to whether a path is wheelchair accessible.... think it would be a good idea to denote this in some way....

Take a look here, and press G:

osm.org/edit?lat=51.82092&lon=-0.01608&zoom=17

You can see the map overlay, with the blue GPS trail beneath it.

The footpath in red runs in a straight line, but notice how the GPS is zig-zagging at either side into the field... I was walking fairly straight, so the zig-zagging must be an inaccuracy in the GPS. Weather was awful when I was walking.

Regards
Chris

I'd always reckoned it would be great to fit GPS loggers into royal mail vehicles!

I'd tend to agree that there should be a way of differentiating between a TV transmitter and a smaller 'mast' as TV transmitters have line of sight for many miles as they are massive, whereas mobile phone masts would only be useful for localised navigation...

Have you let the users know? h in potlatch to find who did it!

Thanks for the link - yes, it does look like the bus stops map! Keep up the good work (o:

(I think as a map I took a photo of a bus route plan in a bus stop with a digital camera!)

I've been to Turku - wish it'd been mapped on OSM like it is now back in 2006!

osm.wiki/Talk:Tag:highway%3Dford

Further to that comment, load up the area in potlatch and press G to see all the GPS traces from everyone - there's usually tonnes for motorways and it can be easy then to work out an average....

Ta
Chris

Thanks, yeah, I've been using surface=paved or unpaved on those nodes, although the tagging guide appears to indicate that these are only applicable to ways.

Ford itself doesn't seem to apply to ways, which it probably should do, as some can be fairly long (Standon is is about 50 meters, but Furneaux Pelham is over a km long).

Irish Bridges are even more complicated, as they are sort of a roadway with culverts underneath to allow water to pass under, but in winter conditions the bridge becomes a ford....

How should questions like this be raised (I've never needed to raise anything in the couple of years up to now as everything else has just worked for me based on the available documentation!)

Regards
Chris

If you're just starting out, take a look at here: osm.wiki/index.php/Map_features

Regards
Chris