Abstract: A three dimensional machine scanning arrangement for a machine traveling over a worksite includes a pair of scanners that are mounted on the machine. Each of the pair of scanners measures distances to a number of points on the ground at the worksite. One of the pair of scanners faces rearward and the other of the pair of scanners is faces forward. A control is responsive to the pair of scanners. The control determines the contour of the worksite. A display, mounted on the machine, is responsive to the control for displaying the contour of the worksite.

Abstract: A three dimensional machine scanning arrangement for a machine traveling over a worksite includes a pair of scanners that are mounted on the machine. Each of the pair of scanners measures distances to a number of points on the ground at the worksite. One of the pair of scanners faces rearward and the other of the pair of scanners is faces forward. A control is responsive to the pair of scanners. The control determines the contour of the worksite. A display, mounted on the machine, is responsive to the control for displaying the contour of the worksite.

Abstract: A method of recording position data for measuring the position of a ground point during a survey procedure in which satellite signals are used to determine the position of an antenna on a range pole. The pole is moved through non-vertical orientations by an operator so that the antenna position is determined at various points which generally do not lie directly over the ground point. The antenna positions lie on a geometric figure, generally the surface of a sphere which is centered on the ground point and has a radius equal to the length of the pole. Characterizing the sphere by a statistical analysis of the antenna positions either in real time or during post processing, leads to an accurate measurement of the ground point position. The method is preferably enabled by an otherwise standard handheld controller device which operates as part of a roving antenna/receiver station. The satellite signals are preferably derived from the Global Positioning System although other systems may also be used.

Abstract: A method and apparatus for automatic event detection and processing is provided. A positioning system receiver includes a position measurement device and a logging device. The position measurement device is configured to receive and process signals from a positioning system. The logging device is coupled to the position measurement device for recording data received from the position measurement device. The logging device records the data at a current logging rate. The positioning system receiver detects an event via an external sensor or with reference to satellite data, for example. In response to the event, the logging device automatically modifies data logging processing such as the current logging rate. Additionally, to allow a post processing system to go backwards in time relative to the event, the current logging rate may be increased for a predetermined amount of time preceding the occurrence of the event.