| 摘要 |
A method for determining a track of a geographical trajectory which has a predetermined start location and a predetermined end location. The method comprises the steps of: moving a data collecting device from the start location to the end location, the device comprising a set of onboard synchronised sensors providing for sample wise collection of physical measurement data during the movement of the device; determining a heading profile, a pitch profile, a distance profile and a roll profile based on the collected measurement data; and determining said track based on said heading profile, said pitch profile, said distance profile and said roll profile. The method further comprises the steps of: collecting trajectory heading and/or pitch information from geographical information and/or trajectory constraints, and organising the collected trajectory heading and/or pitch information as measurement data of a virtual sensor with a sample rate synchronous to that of the common clock signal of the data collecting device. Before determining said profiles, the method further comprises the steps of: determining third trajectory parameters based on measurement data of one or more onboard sensors and fourth trajectory parameters based on the measurement data of the virtual sensor, the third and fourth trajectory parameters being deduced to relate to a single physical quantity, and mapping said third trajectory parameters on said fourth trajectory parameters; determining an error compensation therefrom and correcting said measurement data of said one or more onboard sensors by means of said error compensation. |
