Muara Enim, Indonesia
To acquire topographic data for power transmission engineering.
Dated back to early 2013, the project was started. Until April 2019, the contractor found that surveying with RTK was too slow to catch up with schedule, and decided to shift to LiDAR solution.
Area Size: 1.25 square kilometres
Service: 1:500 topographic survey
Output Demand: DEM, DSM, contours, geo-reference pointcloud, DOM
Accuracy Expectation: 10cm vertical
Project Duration: one month
1. 1-days site visit, to select a location for a GNSS base station, and 2 locations for take-off and landing.
2. Determined flight altitute of aerial laser scanning and image capturing.
Part 1: LiDAR survey - aerial data capture
Equipment: UAV-based LiDAR system, multi-rotor UAV + Mini LIDAR system SZT-R250 (measuring range 250m)
Part 2: UAV photogrammetry - orthophoto imagery data capture
Equipment: UAV with SONY ILCE a6000 and PPK module
10 flights of aerial laser scanning, 2 days.
2 flights of aerial image capturing, 1 day.
Accuracy verification: 1 day
DEM/DTM, contours, vector line map: 10 days
Orthophoto map: 2 days
Accuracy verification results:
Standard deviation 0.0289cm