GeoRSS stands for Geographically Encoded Objects (and we all know what RSS stands for). It could become the standard format for describing routes, trips, and so on. It comes in two flavors: Simple and GML (Geography Markup Language). Both Yahoo and Google now offer GeoRSS support (Google GGeoXml class can dynamically handle both KML (KML is Google Earth’s file format for modelling and storing geographic data) and GeoRSS file formats). Here is an example using Google maps. In this example, I created a track and transfered it as a KML file and then referenced it in a HTML page that creates a Google map and initialize it using this KML file.