The base url for resolving relative urls in the file. Analogous to html's base href. The point used as the origin for distance/bearing calculations. Set by user at point of interest. Overrides the stylesheets in the application in favor of the styles included in the GPX document. Use this tag if you want your document to always be displayed as YOU styled it. You are imposing your style on the user - so use discretion! Draw a cased (outlined) line on the map The data field to use when labeling the waypoint on the map The point of interest on a linear feature (route/track). Two points defining the start and end of a selection (on a linear feature like rte or trk) Starting point of the selection. Ending point of the selection. A vector-based symbol. The category or group that the marker comes from. The name of the specific marker to use.