Hi again.

Why create an entire tile set?

Is your tile creator script fast enough to create, serve and then
cache a tile to the file system?
The script serving cached tiles where they exist otherwise creating a
new tile.

Martin

On Nov 3, 7:19 pm, Aaron Kreider <[email protected]> wrote:
> I've now got a webpage that lets you create your own heat maps!
>
> http://www.campusactivism.org/heatmap/heat.php
>
> It produce tile layers for Google Maps. One for each zoom level.  It
> combines them into a tar file that you can download to use on your own
> website.
>
> The system is slow. I've been using it for mapping the heat of around
> 100-1500 data points, creating tiles up to zoom level 7 or 8 for the
> entire lower 48 US states, and at a resolution of around 0.1 longitude
> by 0.08 latitude.  That can take up to 40 minutes.  You can get it to
> send you an email notification when the script is done (so long as it
> doesn't time out).
>
> It is dramatically faster if you don't need to zoom in so far.
>
> Each zoom level makes it 4 times slower.
>
> It would also be far faster if you did a smaller geographical area -
> like a single state.
>
> Speed is directly proportional to the longitude resolution * the
> latitude resolution.
>
> Source code:http://www.campusactivism.org/heatmap/heat-sourcecode.txt

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