High-end Fibre-optic Gyroscopes offer accurate spatial information about the pipeline. All pipeline features, welds and anomalies will be reported with their location in GPS coordinates. When combined with strategically chosen AGM markerpoints and measured in Differential GPS, the XYZ unit will deliver sub-meter accuracy of the pipeline features. The pipeline curvature can be determined and serve as a basis for strain assessment of the pipeline. The XYZ pipeline mapping unit is a valuable tool to determine the integrity of the pipeline in mountainous or geophysical active environments such as mining areas, offshore and river crossings. The inertial unit can be combined with any other of our inspection tools.