This schema defines Garmin extensions to be used with the GPX 1.1 schema. The root element defined by this schema is intended to be used as a child element of the "extensions" elements in the trkpt element in the GPX 1.1 schema. The GPX 1.1 schema is available at http://www.topografix.com/GPX/1/1/gpx.xsd. This type contains data fields that cannot be represented in track points in GPX 1.1 instances. This element represents an atmospheric pressure (a raw pressure value). This element represents a barometric pressure (a pressure value calibrated to sea level). This type contains a pressure value measured in pascals (Pa). This type provides the ability to extend any data type that includes it.