[OSM-talk] Bing coverage - more levels
ant
antofosm at gmail.com
Tue Feb 8 20:52:18 GMT 2011
Hi all,
I've been thinking about extra colours for super hires imagery and been
doing a little research. See the following list of some notable places
sorted by their highest Bing zoom levels.
Hamburg 20
Vienna 20
London 20
Rome 20
Paris 20
Tokyo 20
Singapore 20
Montreal 20
New York City 20
Denver 20
Los Angeles 20
Kansas City 20
Mexico City 20
Port-au-Prince 20
Munich 19
Helsinki 19
Madrid 19
Warsaw 19
Moscow 19
Istanbul 19
Delhi 19
Tunis 19
Perth 19
Sydney 19
Amsterdam 19
Netherlands rural areas 19
Stockholm 19
Bogota 19
Santiago de Chile 19
Beijing 18
Cape Town 18
Rio de Janeiro 18
Berlin 17
Dublin 17
Damascus 17
Cairo 17
Lagos 17
Germany rural areas 17
Kansas rural areas 17
It seems that all places that have hires imagery of z14 also have it up
to z17 (of which z14-z16 are scaled versions, of course). So no need to
introduce extra colours for anything below z18. Then the question is:
How many colours make sense between z18 and z20 (the absolute maximum)?
I think one colour for each zoom level doesn't make sense, because the
overall differences in image quality are too stark (compare for example
NYC and Santiago de Chile at z19, respectively).
So what about:
14-17 "high resolution"
18-19 "very high resolution"
20 "ultra high resolution"
?
And... which colours? I would have liked a kind of red-yellow-green
scale, but I'd rather keep the green now in order to avoid confusion
(old green tiles vs. new green tiles and so on). So I propose a dark
green for "very hires" and a blueish green for "ultra hires" -- see the
screenshot.
In anticipation of your comments,
ant
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