[mapguide-internals] RFC88 for review

[Tom Fukushima]

Hi Jackie,

Thanks for putting the RFC together.  I started writing something and then it grew, sorry if the below seems like a bunch of disjointed thoughts...it is.

I see that in the RFC it is mentioned that we "need to be able to load any given Web Layout with an initial view"; but can I get some more details on this.  Why do we need to do this? What is the use case?  The reason I'm looking for this is to try to understand if what we are doing is really solving something.  If we're not sure (or even if we think we're sure) I think that a poll of the community could help us out here; and if it's already in some mapguide-users postings, let's add some of those requests verbatim to the RFC.

If the goal is to have a part of the map with certain layers visible then using center and scale will ensure that those layers with scale ranges that that contain the specified scale could show up.  If the goal is to ensure that a certain part of the map is visible then I think that extents are important too. 

For either of the above scenarios, wouldn't it also make sense to be able to specify which layers turned on or off? Use case: I've done some work and now I want to have someone else be able to bring it up and see the same thing that I was looking at (cf. google maps bookmark).

What are the limitations with what we will be doing.  E.g., if I specify center and zoom, and the other viewer user has a smaller screen resolution, less of the map and perhaps some important features will be cropped out. E.g., if I specify extents and the other viewer user has a smaller screen resolution then some layers may not be available at that scale so some important features may not be visible. Can I specify scale and extents; what do we do in this case?

I guess, what I'm looking for is 
1) more description in the motivation section; 
2) limitations; and 
3) a description of what we will be doing now and where we can go with this.  
I think that trying to do 3 could be a lot of effort and essentially stop progress on the RFC so I'm willing to live without that, but if we have any ideas let's add them.

This sounds like the start to some much needed bookmark functionality; and I think is a potential GSOC project because it so interesting!


Tom



-----Original Message-----
From: mapguide-internals-bounces at lists.osgeo.org [mailto:mapguide-internals-bounces at lists.osgeo.org] On Behalf Of Zac Spitzer
Sent: Monday, March 22, 2010 5:31 PM
To: MapGuide Internals Mail List
Subject: Re: [mapguide-internals] RFC88 for review

EXTENT means you don't need to make assumptions about screen dimensions either

On 22 March 2010 23:11, Paul Spencer <pspencer at dmsolutions.ca> wrote:
> Jackie, this looks fine to me.  I also like Zac's suggestion of supporting an EXTENT parameter as an alternative, I suspect for a lot of people they will know what region they want but not necessarily the scale.  Using EXTENT would allow the system to choose a scale most appropriate for the current viewport size.
>
> Cheers
>
> Paul
>
> On 2010-03-22, at 1:59 AM, Jackie Ng wrote:
>
>>
>> Hi All,
>>
>> I am proposing a new RFC that allows users to override the initial view and
>> scale of the AJAX viewer via URL parameters.
>>
>> http://trac.osgeo.org/mapguide/wiki/MapGuideRfc88
>>
>> I believe the turnaround time to implement this is very quick thus the 2.2
>> milestone target on the RFC.
>>
>> Please provide feedback. Thanks.
>>
>> - Jackie
>>
>>
>> --
>> View this message in context: http://n2.nabble.com/RFC88-for-review-tp4776387p4776387.html
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>
> __________________________________________
>
>   Paul Spencer
>   Chief Technology Officer
>   DM Solutions Group Inc
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-- 
Zac Spitzer
Solution Architect / Director
Ennoble Consultancy Australia
http://www.ennoble.com.au
http://zacster.blogspot.com
+61 405 847 168
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