[mapguide-users] Image download size

Gary Morin gary.morin at keynetix.com
Wed Mar 11 18:06:40 EDT 2009

Hi Kenneth


That's what we want, but we need it in the basic layout. We have done a
lot of development porting an MG6.5 application, much of it is in asp.net
using the basic layout. Is there anyway to get it working in the basic






From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Kenneth
Skovhede, GEOGRAF A/S
Sent: 11 March 2009 21:46
To: MapGuide Users Mail List
Subject: Re: [mapguide-users] Image download size


I have applications that does this, using OpenLayers.
Simply create two MapGuide layers, and set the bottom one to use JPG
Fusion 2.0 should be able to support something like this (not sure if 1.1
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: 



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?






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