[OSM-talk] Google Maps comparison
dair at refnum.com
Thu Oct 11 21:23:37 BST 2007
Richard George wrote:
>The routing and naming of that road are somewhat dubious on OSM.
>heath suggests that this name/street exists. A similar search for
>'"Wellswood Road", Haywards Heath' comes up effectively blank.
Colwell Gardens does exist, but the right-hand section is now
"Wellswood" (no Road). There's a picture of the signs at:
>For this street to have the route now shown, a number of houses
>would have to have been demolished since the aerial photo was taken;
>this is possible but seems unlikely. The 'cap' roads shown in OSM
>are also something of a conjecture - one can be seen to exist on the
>satellite data but the other is a bit of a stretch.
>This road, to be honest, looks like an OSM easter egg.
The layout on the ground is as per OSM. Here are some photos:
The aerial photos are at least 4 years old; a planning
application to demolish the old street was submitted in 2003.
I think this shows how important presentation is; Google have a
nice UI for interacting with the map, a good looking renderer,
high-res aerial photos, etc, so it's natural to assume that what
you're seeing is error-free.
>Neither map shows the road (which may be private) between St
>Edmund's Road and Kent Road.
Well spotted, I've collected a trace from there and updated the
map (it's a service road leading to some lock-ups for those houses).
>The roundabout (down by the postbox) at the bottom of these maps is
>shown vastly too large by google, and entirely missing in OSM.
The roundabout was actually present in OSM, but I forgot the
highway tag so it wasn't being rendered. Also fixed. :-)
dair at refnum.com http://www.deathvalleycycle.com/
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