[OSM-dev] Unwayed segments (was: Potlatch update)
frederik at remote.org
Wed May 9 18:30:51 BST 2007
Harry Wood sent this and asked me to relay it to the list:
-------- Original Message --------
Reply-To: Harry Wood <harry at onlineanimals.co.uk>
Subject: Re: [OSM-dev] Unwayed segments (was: Potlatch update)
I'm not properly registered on the mailing list, so I can't reply to
all, but feel free to post this to everyone on my behalf if you like...
Of course with the GPS mapping workflow, you dont get segments unless
you've been there, and so segments should immediately be turned into
classified ways, but when working from Yahoo! Aerial Imagery, there's a
very different mapping workflow:
The convention seems to be to create a lot of unwayed segments.(tracing
over the aerial imagery in the Java Applet) It's clear other users have
been doing this, and I've followed their example for large areas of
The next step (at least my way of doing it) is to printout an osmarender
map of an area, which shows the unwayed segments (in very light grey)
and then use this while walking around collecting the street names and
other classification data. Easy! Of course I need to keep a lookout for
any extra segments which might need to be added, e.g. covered over
tunnels/alleyways, footpaths, or streets where trees have hidden a
street from verticle view.
But the point is, there's lots of very valuable unwayed segments in
London, and perhaps in other Yahoo! Aerial Imagery areas. These are
created as the first step in mapping an area using the imagery, ...and
should not be deleted!
Frederik Ramm ## eMail frederik at remote.org ## N49°00.09' E008°23.33'
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