[Openstreetmap] more distributed ideas
simon at zymurgy.org
Fri Feb 3 22:22:26 GMT 2006
Erik Johansson wrote:
> On 2/3/06, Richard Fairhurst <richard at systemed.net> wrote:
>> Another is to store simplified segment paths. When you're fully zoomed
>> in, sure,
>> show the full-point version. But when you're viewing a small scale map, you
>> actually only need a handful of points to generate the same line. Again, this
>> could either be done when the data is loaded/edited, or by means of a
>> cron job.
Look at how others to this:
At large scales, only motorways are shown, zoom in a bit and you get
dual carriageways and then primary roads, then zoom in more, and you get
secondary roads. Zoom further you get minor roads and residential
streets. Zoom right in and you can see back alleys and paths.
So, in order to achieve this, we'd need the API to support selecting
only a subset of segment class names within a bounding area, and a
mapserver that knows about this. While you're at it, you can make the
mapserver render the classes differently.
It would also make the large scale maps look far nicer than just a big
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