[OpenLayers-Users] status of OpenLayers.Layer.TileCache ?

[Gregor Mosheh]

> You have seen http://openlayers.org/dev/examples/tilecache.html , right?

Indeed. That's what I mimicked, which gave me some bizarre errors. They 
were so weird (the GeoRSS layers vanishing) that I thought to ask first 
before putting too much effort into it.


> At some point, it's not how fast the server can get the tiles: it's how
> much bandwidth you have to fetch them (and, to a sometimes much greater
> extent, how big they are to begin with). Optimizing your images can
> squeeze a lot more apparent speed out of the same server... 

You're absolutely right. At present, I'm generating 24-bit PNGs without 
interlacing. PNG24 is my favorite, as it has both color fidelity (unlike 
8-bit formats reading from remote WMS, yuck!) and transparency (unlike 
JPG) and pretty great quality to boot. Each tile (standard 256x256) is 
between 3500 and 5100 bytes, which I figure is pretty decent, and it's 
pretty zippy.

Any comments would be welcome, of course.

-- 
Gregor Mosheh / Greg Allensworth
System Administrator, HostGIS cartographic development & hosting services
http://www.HostGIS.com/

"Remember that no one cares if you can back up,
  only if you can restore." - AMANDA