[mapguide-users] Silverlight/Moonlight Viewer

Thu Jun 26 05:16:56 EDT 2008

I am looking to improve responsiveness.
If the vector data is avalible on the client, features modifications, 
layer toggling, selection, etc. is going to be very fast.
Tooltips and links would put significantly less strain on the server.

I would still use a "base map" to avoid having to transfer too much 
coordinate data (ea. buldings).

A second gain would be more control over the rendering process. I can 
see problems with supporting
all style options, and making them behave exactly the same. There would 
also be problems with
label overlapping and such.

But I would not mind this, because I can tell the user to set it up in a 
particular way to achieve the desired effect.

Regards, Kenneth Skovhede, GEOGRAF A/S

Zac Spitzer skrev:
> So if your talking about a vector based viewer, you could hitch onto
> the DWF support in the mapguide server.
>
> I am, however, sceptical if there is much to be gained there
> performance wise using GDI+ coz anything which is going
> to really benefit from that sort of acceleration is going to require a
> lot of vector data to be transferred down to the client
> and then you are going to need to support all the stylisation options
> for a mapguide layer plus all the interactions
> between layers for labelling etc.
>
> having everything as vectors in mapguide 6.5 was quite useful and
> allowed for some funky tricks...
>
> so to take a step back, what are the things your're looking to improve on?
>
> personally i think there's some pretty easy http tweaks to the
> mapguide server which would really,
> really boost performance, like setting cache headers (last modified,
> cache expiry) for tiles allowing a plain
> old proxy server to serve tiles without any mapguide server overhead
>
> z
>
> On Thu, Jun 26, 2008 at 6:04 PM, Kenneth Skovhede, GEOGRAF A/S
> <ks at geograf.dk> wrote:
>   
>> Silverlight uses GDI+, which also supports hardware acceleration.
>> I would prefer Silverlight over Java because it intergrates better with the
>> html DOM (IMO).
>>
>> As for codebase, the current viewers are based on Javascript, and they are
>> limited to
>> manipulating pre-rendered images.
>>
>> The DWF viewer is some of it, but it is still ActiveX based.
>> I suppose one could make plugins for all browsers, but it still difficult
>> to persuade regular web users to install it.
>>
>> Since Silverlight/Moonlight is more likely to be installed already,
>> and backed by Microsoft, it will probably be easier.
>>
>> Flash is another option, but it is terribly hard to work with (IMO).
>>
>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>
>>
>> Carl Jokl skrev:
>>
>> I think that there could potentially be a number of alternatives to using an
>> Active X based viewer. I could see potential also for both Flash or Java to
>> create a viewer too. One problem with the Active X viewer in relation to the
>> clients of the company I work for is the security / administrative problem
>> for our clients. Organisations internet security policies could interfere
>> with deployment of an Active X control. I would think though that the same
>> issue would apply to a Java based viewer too. Silverlight might work better
>> in this regard.
>>
>> One of the reasons I find the Java option interesting is the availability of
>> JOGL essentially allowing a Applet or Web Start application to be able to
>> take advantage of Hardware accelerated graphics. I don't know if any
>> alternative viewers have been worked on. If much of MapGuide is open source
>> would that include the viewer? If so it might be possible to start from the
>> existing viewer source code and port it to another platform.
>>
>>
>> Kenneth Skovhede, GEOGRAF A/S wrote:
>>
>>
>> Has anyone started or is considering starting development of a viewer in
>> Silverlight/Moonlight?
>>
>> Such a viewer should be able to achieve performance that is comparable
>> to the MapGuide 6.5 viewer,
>> without the need for an ActiveX plugin.
>>
>> --
>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>
>>
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>
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