I have applications that does this, using OpenLayers.
Simply create two MapGuide layers, and set the bottom one to use JPG
compression.
Fusion 2.0 should be able to support something like this (not sure if
1.1 does?)
The drawback is that you get two server calls, but it is still faster,
even on fast lines.
Regards, Kenneth Skovhede, GEOGRAF A/S
Gary Morin skrev:
Hi
We currently have an issue with MapGuide with the size of Image
download when viewing Aerial images or detailed raster maps, we are
finding the average PNG download is 2 -- 3 mb, this makes for very
slow web client when working over the internet.
We know you can change the image format and have tested JPG and PNG8,
but the image degradation is to great, I'm not sure how much the
proposed ticket http://trac.osgeo.org/mapguide/ticket/465 will help
with this.
We have experimented in using Base maps, but we really do not want
fixed zoom scales.
So I wondered about a compromise, where the vector data is downloaded
as PNG and image data is downloaded as compressed format, similar to
using Base Maps but without the tilling, the PNG is then overlaid on
the raster image. Does this makes sense?, would it be feasible for the
a future development? The idea is you zoom and pan as normal for a non
tiled map.
Any comments?
Gary
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