Interactive Spiders and Charts
A couple of updates to my recent Google Earth GPS-satellite visibility animation:
Firstly, you can now change the viewing location to anywhere on Earth. To do this, right click on the Location folder (with the blue dot) in the side panel and select Refresh. The animation will then centre on the current view.
Secondly, the visualization displays a Screen Overlayed bar chart by hooking up to the new, and very slick Google charts API. The chart shows the duration, in hours, specific numbers of satellites are visible. The idea being to demonstrate how the distribution profile changes with location.
As a secondary (secondary) option you can view a 24 frame animated bar chart. Where I cumulatively add the current hour’s stats, shown in red, to all the previous hours’ , shown in green. A bit OTT, but interesting to see how rapidly the API dynamically generates the images on demand, and GE caches them.
Edit (2007-12-26): removed this option temporarily – see comments.
Download the file here:
GPS Animation ~200kB
There’s a useful tutorial on how to create and embed charts in KML balloons on the official Google Maps Blog. Only difference I found in adapting it for KML Screen Overlays (or Icons, Ground Overlays and PhotoOverlays for that matter) is I needed to use & instead of & in the URLs.