[worldKit-dev] multiple events at single locations

[Mikel Maron]

This is a long outstanding issue .. in fact the oldest unresolved issue in the tracker!
http://www.rockburger.com/roundup/roundup.cgi/worldkit/issue5

Currently annotations on the same location are just layered on top of each other. The most recently plotted annotation obscures those beneath it.

A complication is that this doesn't only apply to annotations in the exact same location, but also to nearly the same location. At a low zoom level, two points on different locations can potentially obscure each other.


The solution in worldKit would be to introduce an interaction manager above the level of individual annotations. If a click falls over multiple annotations, the manager would combine the result in some way - like passing multiple ids through the javascript, opening multiple windows, display a flip book like annotation in worldkit.

This will have to wait for the refactor, at which point I think it can be done easily. This would be a great feature for someone to pick up and run with.


A solution for you currently would involve, as you mention, processing of the GeoRSS feed on the server side, and producing popups containing multiple annotations in response to any single annotation click. 

I believe worldKit also passes the <link>. 

-Mikel

----- Original Message ----
From: Bruce Thomas <rheotaxis at gmail.com>
To: worldkit-dev at lists.brainoff.com
Sent: Friday, January 27, 2006 3:29:36 AM
Subject: [worldKit-dev] multiple events at single locations

I have tried using RSS 2.0 to put multiple annotations at the same location, and only one <item> is visible. I need to allow users to disambiguate among several (up to seven or eight) different hyperlinks from the same point on the map. If there is one <item> in the GeoRSS for each unique location, and using <window>_javascript:foobar</window>, the _JavaScript function foobar() could pop open a separate, little window with all the hyper-links in it, sort of like the cartoon ballon that opens above Google map markers. Is there any better way? I probably have to use the ID to call back to the server to get the content that goes into the pop-up window, but I wonder if I could do it all on the client side by pulling more information from the GeoRSS that is already downloaded. The documentation says worldKit displays the annotation <title> and <description>, but there might be other <item> childern available/accessible by using the ID passed to my foobar() function?
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