[sldev] Webmap API change
labrat.hb at gmail.com
Fri Jan 30 02:08:14 PST 2009
I haven't had time to do much work with the OpenLayers SL API conversion.
But I did get the following done:
native OpenLayers API, with a second map layer to display the Region Name
and coordinates at the highest zoom level. An overview map window is
The name layer is generated via PHP and is using a cheap cache method to
cache the images.
On Mon, Jan 26, 2009 at 5:11 PM, Harold Brown <labrat.hb at gmail.com> wrote:
> I need to fiddle with my server tonight, maybe I'll have time to get
> TileCache setup and cache in some overlay tiles with the region names and
> co-ordinates on them. My current system generates them on demand using
> PHP.... not the fastest method at the moment and only works at the highest
> zoom level.
> On Mon, Jan 26, 2009 at 4:34 PM, Ryan Williams (Which) <rdw at lindenlab.com>wrote:
>> Philip Rosedale wrote:
>> > I think that the problem is that you can only actually overlay
>> > transparent images in a browser using .PNG, right? So that means that
>> > you can't really do it, because the only way to get anywhere near
>> > reasonable performance is the compression you get from JPEG.
>> The base images compress well with JPEG, but any overlay images you'd
>> care to generate will likely compress well with PNG. E.g. Google's map
>> overlays are mostly transparent with solid blocks of color. Also, while
>> it is unacceptable to have slowly-loading base tiles, it's not as bad to
>> have overlay tiles that take longer to download and pop in later, on
>> top. Food for thought. :-) Glad you made provision for overlays,
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