The simplicity and complexity of straights and curves

Abstract

Much of the mobile mapping activity in Australia has been applied to the mapping of railways. Over the last decade the process has evolved from one narrowly focused upon establishing the position of track centrelines to one which includes the position and geometry of the track, imagery and detailed attributes of all trackside features. This broader perspective has been required as the mobile mapping processes have become a core requirement for the development of railway asset management systems. Positioning sensors installed on the mapping platform include GPS receivers (differential pseudo-range), shaft encoders for the measurement of travelled distance, direction sensors and tilt meters. M..