Towers, masts and pylons

surveying powerlines with combination of GPS & total station

Length matters, or at least it does when considering how best to survey power lines. Where substantial route lengths are involved, aerial LIDAR surveys provide the most cost effective method of gathering large amounts of data. For many purposes, such as checking ground and vegetation clearances, the accuracies obtained are quite adequate. Where critcal dimensions are needed or full details of tower geometry, LIDAR doesn't always provide adequate information.

tension tower

A combination of LIDAR and detailed ground survey for tower geometry can provide the best engineering solution. The general ground shapes, minor crossings of other overhead lines and vegetation information are gathered by the LIDAR, together with a reasonable model of each tower. The ground survey provides centimetre accuracy for the basic tower geometry, suspension and attachment points and also acts as a rigorous control check for the LIDAR data, by enabling comparison to be made between the ground surveyed points and the deduced LIDAR equivalents.

SCS have developed their own software and survey attachments to enable this kind of project to be undertaken to high standards of accuracy.