COMPARISON
The client had requested a stockpile survey to determine its volume for the purpose of monetary claiming period. Precise Spatial Services Pty. Ltd. took the opportunity to conduct a drone LiDAR flight alongside the conventional method of a surveyor using a GNSS rover to showcase the results between LiDAR and conventional.
LiDAR (Light Detection and Ranging) aerial surveys provide a vastly larger amount of observations, ensuring a more detailed and accurate representation of the stockpile over conventional surveys.
With the collection of both data sets (LiDAR and conventional methodology), Precise Spatial found a variation of only 0.5% between the two datasets with the LiDAR dataset having a larger volume.
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A point to surface comparison was also undertaken with 90% of the conventional dataset falling within 50mm of the LiDAR surface and 74% within 30mm.
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Conventional method of using surveyors with a GNSS rover physically entering the field to take precise measurements of a stockpile is increasingly viewed as an unacceptable risk, given the availability of emerging technologies such as aerial surveys, that offer lower risks and comparable accuracy as alternatives.
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Materials such as asbestos are common on construction sites, and any survey tasks will require a full body suit for safety. Being exposed to asbestos increase the risk of developing cancers of the lung, ovary, larynx as well as mesothelioma (cancer of the lining of the lung). These cancers often develop decades after exposure to asbestos.
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Precise Spatial follows all work health and safety laws and precautions for duty of care and responsibilities to reduce the risk of asbestos exposure.