There are many smart phone applications out there that can be used to collect GPS points and tracks, this task sheet covers how to collect GPS tracks with the GeoTracker - GPS tracker android app and how to export the tract as a GPX file. GPX is a GPS Exchange Format, it is an XML schema designed as a common GPS data format for software applications. GPX files can be converted to many other geospatial data files formats such as Shapefile, KML, or GeoJSON.