Leaflet & GeoCommons JSON

Leaflet & GeoCommons JSON by Tim Waters.

From the post:

Hi, in this quick tutorial we will have a look at a new JavaScript mapping library, Leaflet using it to help load JSON features from a GeoCommons dataset. We will add our Acetate tile layer to the map, and use the cool API feature filtering functionalities to get just the features we want from the server, show them on a Leaflet map, add popups to the features, style the features according to what the feature is, and add some further interactivity. This blog follows up from two posts on my personal blog, showing GeoCommons features with OpenLayers and with Polymaps.

We have all read about tweets being used to plot reports or locations from and about the various “occupy” movements. I suspect that effective civil unrest is going to require greater planning for the distribution of support and resources in particular locales. Conveniently, current authorities have created or allowed to be created, maps and other resources that can be used for such purposes. This is one of those resources.

I don’t know of any research on such algorithms but occupiers might want to search for clusters of dense and confusing paths in urban areas. Those proved effective at times in struggles in Medieval times for control of walled cities. Once the walls were breached, would-be occupiers were confronted with warrens of narrow and confusing paths. As opposed to broad, open pathways that would enable a concentration of forces.

Is there an algorithm for longest, densest path?

However discovered, annotating a cluster of dense and confusing paths with tactical information and location of resources would be a natural use of topic maps. Or what to anticipate in such areas, if one is on the “other” side.

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