[talk-au] Optimising map rendering for recreational use

Li Xia lisxia1982 at gmail.com
Thu Nov 1 08:23:22 GMT 2012

Thanks for the suggestions, I couldn't agree more for static rendering. However this approach has some massive draw backs in terms of performance. Any suggestions in this region?


On 01/11/2012, at 5:13 PM, Daniel O'Connor wrote:

> What do you guys think?
> It's non trivial to do it this way, but:
> Define a relationship between zoom level and number of ways/nodes within the bounding box
> Sort the ways in a weighted fashion - roads first, land boundaries second, etc
> Zoom level max, with 10 nodes to render: well, that should likely render everything
> Zoom level max - 1 with 1 billion nodes to render - roads only
> To actually set up the balance between zoom and what to render would be hard, but I think that's a better approach than render hints. Alternatively, after implementing it, you could add a 'render weighting/interest' attribute to a lot of ways, which would be like a render hint but also suitable for other purposes - ie: routing or search.

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