Measuring Versus Estimating
In surveying complex shapes, such as an open-pit mine or an adjoining mountain that holds as-yet un-mined reserves, 3D laser scanning provides higher accuracy than traditional survey. Seis-scan enables the asset owner to measure rather than merely approximate the shape and estimate the volume of stockpiles, mines and remaining un-mined terrain.
Traditional surveying methods measure locations of significant features. The more complex the shape, the more survey points are needed, and the longer and more expensive the survey becomes. Often the best that can be done cost-effectively is one point every 5-10 metres.
But not every stockpile is a simple cone-shaped pile. When surveying complex shapes like open-pit mines or mountains, the surveyed shape is reduced to a blocky approximation, as Figure 1 shows. Accuracy is quickly reduced.
Seis-Scan takes measurements at centimetre-level resolution – usually from only a small number of scan locations, selected for their visibility and safety. That makes Seis-Scan more efficient and far more accurate. The most complex shapes are truly being measured and the survey result is an accurate depiction in three dimensions, as Figure 2 shows. And that lets the asset owner really understand what they have to work with.
Figure 1: Example of surface output from “Traditional” survey methods (Stockpile comparision RTK)
Figure 2: Example of surface output from using 3D laser scanning (Stockpile comparision Scanning)