1. Project Overview

　　The project is located in a city in Central China. The survey area is dominated by mountainous terrain. The average elevation is 650 meters, of which the lowest elevation is 300 meters and the highest elevation is 920 meters. There is a large drop in some part of the survey area. The entire wind farm covers an area of roughly 12 square kilometers, and the vegetation is subtropical evergreen broad-leaf forest with large coverage and various types..

Survey area

　　2. Project Requirements and Difficulties

　　(1)Accuracy requirements

　　Point density better than 15pt/m²

　　Elevation accuracy better than 15cm

　　(2)Project difficulties

　　Complex terrain: mountainous terrain with large drop-offs.

　　High risk factor: typical mountainous terrain with severe view blockage.

　　Difficult to transfer: The road conditions in the mountainous area are complicated, and the it takes a long time to transfer the equipment.

　　Epidemic difficulties: since all provinces and cities in China were still in the epidemic prevention and control stage, the local transportation and accommodation of the project as well as the epidemic prevention and control measures were unknown.

　　3. Solutions

　　The project team of Hi-Cloud quickly set out for the survey area to conduct the survey., determine the operation sequence and take-off and landing sites, formulated the technical scheme overnight and completed the route planning of the whole survey area according to the project conditions and difficulties, and began field data collection the next day.

　　(1)Personnel and equipment arrangement:

　　Two field technicians, one internal data processor and one driver were deployed.

　　ARS-1000L airborne laser measurement system is adopted in the project. A total of 3 takeoff and landing points, H1, H2 and H3 were selected for the whole survey area, and a total of seven sorties were flown.

ARS-1000L Airborne LiDAR measurement system

　　(2)System Advantages

　　Full carbon fiber fuselage, good rigidity and light weight.

　　Super long endurance, operating time of more than 50min.

　　Super long flight distance, total range over 25km.

　　Excellent wind resistance for increased flight smoothness.

　　Excellent power redundancy for proper operation at high altitudes.

　　4. Data Results

Outcome data

　　(1)High precision DEM results

High precision DEM results

　　(2)Point cloud accuracy verification.

Point cloud accuracy verification table

　　5. Project Summary

　　Under the severe epidemic situation, the project team of Hi-Cloud completed the point cloud collection of about 15km² in mountainous areas in only 3 days from the survey to the completion of field work. The point cloud accuracy and various indicators met the project requirements. The successful completion of the project fully demonstrates the product characteristics of Hi-Cloud airborne 3D laser scanner with high operation efficiency, and also reflects the working characteristics of Hi-Cloud people, such as flexibility, facing difficulties and being rigorous and meticulous.

　　6. Product Recommendation

　　(1)Ars-1000/1000L airborne laser measurement system

　　(2)PM-1500 airborne laser measurement system