Based on your question I'm guessing that you're not doing this
intentionally, but multiple requests for exactly the same image tile
have unique URLs. For example, you get the same response for the
following three URLs:
- mesonet.agron.iastate.edu/cache/tile.py/1.0.0/nexrad-
n0r-900913/8/61/103.png?1288425794559
- mesonet.agron.iastate.edu/cache/tile.py/1.0.0/nexrad-
n0r-900913/8/61/103.png?1288425816324
- mesonet.agron.iastate.edu/cache/tile.py/1.0.0/nexrad-
n0r-900913/8/61/103.png?1288425822200

The number on the end of url (JavaScript Date.getTime() perhaps ?) is
making each request unique and therefore useless in a browser cache.
So something in there is actively preventing caching - however I'm not
familiar enough with v3 to know if that's likely to be you or the
API.

In addition, your response headers are not telling the browser to
cache the returned image - there are no cache-control headers.


On Oct 29, 9:10 am, Chad Killingsworth
<[email protected]> wrote:
> You will probably need a custom overlay that simply hides and shows
> layers once loaded. 
> Seehttp://search.missouristate.edu/map/mobile/examples/tileoverlay.js
> for a starting point.
>
> Chad Killingsworth
>
> On Oct 29, 10:00 am, peanut <[email protected]> wrote:
>
> > No thoughts on this?
>
> > I am still looking for a solution.
>
> > Rich

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