Abstract
Google Earth (GE) can display timestamped features sequentially to create an animation on its interactive globe. The GE TimeSpan capability has been utilized to show a variety of imagery such as historical maps, or before/during/after imagery of remotely sensed landscapes for easy comparison of changes due to a particular event such as flooding. The period between such events can be minutes, days, or even years, and possibly be available at irregular user-specified intervals. As such, TimeSpan is well-suited to properly display imagery that can be georeferenced, encoded into a Keyhole Markup Language (KML) file, and timestamped for sequential viewing. For imagery that is available at regular intervals, an automated process can be employed to create a continuously updated KML file. Here I describe such a process, a mashup that generates a loop of national weather radar imagery for viewing on Google Earth.
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