Date:

Location:

Project:

Jan, 2020

Muara Enim, Indonesia

To acquire topographic data for power transmission engineering.

Background

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. 

Requirements

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

Preparations

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. 

Fieldwork

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.

Data Process

Accuracy verification: 1 day


DEM/DTM, contours, vector line map: 10 days


Orthophoto map: 2 days

 

Accuracy verification results:

    Standard deviation 0.0289cm

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