Testing and Verification of the Accuracy of 3D Laser Scanning Data

Accurate representation of existing facilities with ornate or elaborate fixtures is limited by the amount of labour required in conventional surveying data collection techniques. Three dimensional laser scanning may replace the use of conventional surveying practices by faster and more complete data collection in some instances. The completeness of the data coupled with the reduced time in the field can revolutionize survey data collection and rendering in many areas such as deformation analysis, as builts, volume determinations and architectural and heritage recordings. A laser scanner is a pulsed laser ranging system coupled with mirrors to facilitate beam deflection. Cyrax 2500 laser scanners were tested within The Focus Corporation to investigate the accuracy of the system. Cyrax performance will be tested in a close range application to verify the accuracy at extremes of mirror deflection as well as range data collection within specifications. The data compared will be the coordinates of survey control to the coordinates of targets determined by Cyra’s Cyclone software. Cyra Technologies Inc. produces the laser scanner, which is a wholly owned subsidiary of Leica Geosystems.