Re: [sahana-maindev] Integrating Interactive flash charts with Sahana Framework

[Fran B. <fl...@pa...>]

Gavin Treadgold wrote:
> One area that flash may come in handy, is the display of hundreds to  
> thousands of points on a map. I've heard from a local developer here  
> in NZ, that for example, Google Maps is only capable of displaying a  
> few hundred points before effectively dying under the number of  
> points. His solution was to use flash to be able to produce maps that  
> had thousands of points plotted on them. E.g. try plotting the home  
> locations of thousands of displaced families.

The solution here is to use Clustering to mean that similar points are 
rendered as one at higher zoom levels:
http://dev.openlayers.org/releases/OpenLayers-2.7/doc/apidocs/files/OpenLayers/Strategy/Cluster-js.html
Look at KML SuperOverlays in the new version of GeoServer:
http://conference.osgeo.org/index.php/foss4g/2008/paper/view/290/192

> So interactive flash charts also have a strong linkage to GIS and  
> reporting, and are probably something we may want to look at some  
> stage in the future.

Flex can indeed do some great visualisations, including mapping.
I was very impressed at FOSS4G by Birdeye & there was another talk 
missed on using Flex for Mapping:
http://conference.osgeo.org/index.php/foss4g/2008/paper/view/27
http://conference.osgeo.org/index.php/foss4g/2008/paper/view/125

F