Mengapur Mine Survey
Mine site development requires various layers of spatial data and balancing an everchanging cost versus accuracy equation. Many companies utilise existing or satellite data as a low-cost layer option moving to more accurate options as alternatives are refined. While opting for a low-cost execution is tempting, the consequences of basing decisions on flawed spatial data can prove detrimental.
The Challenge
Menagpur is a Malaysian mine being developed using both aerial and ground surveying techniques. Comprehensive survey methodology provides certainty to pending decisions while delivering a rigorous spatial data layer to facilitate the mine for life.
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The Solution
Field surveys require sound networks of reliable Permanent Survey Marks (PSMs). AAM resurveyed 15 PSM’s with a braced DGPS network adjustment. The Mining Company had only recently acquired an interest in the project, however a fast review and validation was needed of the existing survey data.
We resurveyed existing drill hole collars supporting a reliable review of the mineral resource. AAM confirmed the claim corners suited the Certified Plans locations.
AAM deployed a first order LiDAR sensor and personnel to collect an accurate point cloud. Datapoints were collected at a better than 1m point spacing, accurately defining the site’s terrain surface.
The Results
The Mining Company’s existing data failed to meet regular accuracy standards likely due to inexperience or lack of appropriate equipment. Apparent savings by selecting the lowest cost tender are generally overshadowed if survey data ends up being discarded.
We also provided 20cm digital colour site orthophotos complementing the LiDAR’s spatial definition. Our field survey team established ground control points (GCP’s) to tightly orientate all aerial photographs towards the ground. These also combine with terrain data showcasing the site’s 3D visualisations proving especially useful to community consultation, investor summaries and site planners.