<title>Computerized Structure Clearance Measurement System (CSCMS)</title>

Abstract

Traditional surveying techniques and the use of mechanical structures mounted on rolling stock are the current methods for measuring clearance around Queensland railway lines. A new method, decribed in this paper, is being developed for Queensland Rail by a consortium of three Brisbane companies.The project involves the merging of two technologies, both of which are themselves evolving rapidly. The first of these is Digital Photogrammetry which provides three dimensional information through the processing of stereo images. The second is the capture of digital images and the pre-processing and transmission of large quantities of video data in an industrial environment. The result is a Computerised Structure Clearance Measurement System which allows operators to make accurate measurements with reference to a clearance gauge profile.