Large areas, slopes, and rock outcrops can be surveyed with centimetre-scale accuracy within limited time and costs. Images acquired from an RPAS are used to create digital surface models and 3-D point clouds. Further analysis can provide volume estimates, change detection, and multi-band image classification. Some example applications are presented below.
determined by an RPAS-derived 3-D model.
and represented above as (a) a photorealistic orthographic projection,
and (b) a high-resolution digital surface model.
Expertise at NGI
NGI has carried out internal R&D on RPAS opportunities for geohazard and general geological / geotechnical mapping starting in 2015 and became a Norwegian certified, commercial RPAS operator in the same year. In 2021, NGI operates seven small aircraft with a multitude of different onboard sensor types for surveying. NGI continues to apply RPAS tools in many different research and consulting projects.
RPAS related services
- High-resolution 3-D mapping
- Volume calculations
- Automatic detection of joint sets
- Slope stability monitoring
- Multispectral mapping and thermal infrared imaging
- Licensed Norwegian RPAS operator (RO1)
- Training in geoscience related RPAS operation
Equipment in use at NGI
Aircraft: DJI Phantom series (DJI Phantom 4 Professional, Phantom 4 RTK)
Sensors: RGB cameras, Parrot Sequoia multispectral camera, FLIR thermal camera
Software: Professional 3-D modelling software (Agisoft Metashape Pro, InnovMetric Polyworks, Maptek PointStudio); Professional geospatial analysis and mapping software (Esri ArcGIS products, Trimble eCognition)