Case study of terrain surveying using UAV equipped with green laser - free data available.

Utilizing green laser UAV surveying to achieve advanced disaster recovery activities.

Our company's green laser scanner has the characteristic of emitting green laser light, which is less absorbed by water compared to the commonly used near-infrared lasers. By mounting this scanner on a UAV and conducting laser measurements, we can obtain seamless and high-precision data down to the riverbed in areas where measuring wet surfaces or locations where land and water surfaces mix, such as rivers and ports, was difficult with near-infrared lasers. This case is part of our participation in the environmental restoration activities, including the conservation of saline wetlands in the disaster-affected areas of the Great East Japan Earthquake, conducted by the NPO Mori wa Umi no Koibito. Due to ground subsidence from the earthquake, a rare saline wetland was created in Japan, where river and sea waters mix. As time passes since the disaster, while the ecosystem within the wetland is becoming richer, it is expected that the ground will rise due to elastic changes, leading to a decrease in wetland area due to the growth of reeds. We have created a high-precision 3D topographic map of the area surrounding the wetland by conducting benchmark surveying and green laser surveying. By continuing measurements, we monitor changes in the surrounding terrain and build a GIS on a 3D model of the rich ecosystem, thereby cooperating in both environmental conservation and disaster recovery efforts.

Surveying