Why East African Mining Operations Are Adopting Airborne LiDAR Surveys

Mining in East Africa is a high-stakes business. A gold mine in Geita or a coal operation in Mbeya operates on margins determined by precise volumetric accounting — the difference between reported ore extraction and actual production can represent millions of dollars in revenue and significant regulatory exposure.

For decades, large-scale mining operations have relied on conventional ground surveys for volumetric measurement — a slow, labour-intensive process that exposes survey teams to hazardous open pit environments and produces point-in-time measurements that are obsolete before the report is written.

LiDAR: From Aviation to Mining

Light Detection and Ranging (LiDAR) has been used in airborne topographic surveys for government applications since the 1990s, but its adoption in mining has accelerated dramatically in the past decade as airborne and UAV platforms have become cheaper and more capable. Modern LiDAR sensors mounted on aircraft or large UAVs can capture billions of 3D measurement points across an entire mine site in a single flight — at accuracies of ±2–5 cm in both horizontal and vertical dimensions.

• Full mine site capture in 4–8 hours of flight time vs. weeks of ground survey
• No personnel access required to active hazardous areas (blast zones, tailings facilities)
• Volumetric calculations derived directly from point cloud data — eliminating interpolation error
• Digital elevation model suitable for drainage analysis, geotechnical assessment, and planning
• Historical archive enabling change detection between campaigns
• Compliance-ready accuracy reports meeting Tanzanian mining regulations

TANGIS's Mine Site Experience

Working with a major gold mine operator in the Geita Region, TANGIS implemented a bi-annual LiDAR survey program covering 48 km² of active operations including the open pit, tailings storage facility, waste dumps, and processing plant area. The survey replaced a manual ground survey program that had required 6 weeks of field work and produced measurements with ±8% volumetric accuracy.

The LiDAR program delivers equivalent coverage in two flight days, with volumetric accuracy of ±1.2%. More significantly, the LiDAR data enabled a 3D digital twin integration that gives the mine's engineering team continuous visibility of site conditions between campaigns.