Data of terrain that required a huge amount of time in ground survey.
Instantaneous three-dimensionalization with high accuracy IMU position and orientation information and high-performance, compact LiDAR sensor scanning data from the sky!
A small, lightweight, highly accurate Lidar system "TDOT " greatly changes the survey with a drone, mainly used for photogrammetry.
With high precision IMU installed, you can instantly acquire 3D data of the current state topography simply by flying a drone.
TDOT is compact and light weight as 1.8kg, you can easily perform a series of work from flight alignment to measurement.
In photogrammetry, it is necessary to prepare a complicated flight plan that is based on the calculation of the lap rate, install GCP and antiaircraft beacon by survey specialists, and perdorm stitch editing work for connecting the photography image.
"TDOT" greatly reduces the enormous time and effort required for 3D data acquisition by this photogrammetry.
In addition, photogrammetry cannot acquire data under vegetation such as trees and grass, but "TDOT" can acquire them at pulse rate of 40 to 60 thousand points per second.
The survey which should take a week, now can be done in an hour.*2
It is no longer necessary to set GCP (known point) which is necessary for photogrammetry.
It is possible to finish process data in about 1 / 10 of the time compared with photogrammetric analysis processing.
It is not necessary to fly outside the target area for overlap needed for photogrammetry.
TDOT can survey even under trees, which photogrametry can not do. *3
* 1 Illustration of measuring the mountainous area with trees with 2 people by total station and laser surveying with drone.
* 2 The laser density on the ground surface depends on the density of trees.
Compared with surveys using aircraft such as helicopters (rotating blades) and Cessna (fixed blades) so far, by using a drone laser irradiation from a low altitude can get high density and high accuracy point cloud data.
Three-dimensional point cloud
image diagram around the river.
The shape of the car can
also be determined.
It can be seen that the altitude of the transverse section created by the laser survey is lower by the amount corresponding to the vegetation and catches the ground surface. In photogrammetry, a lot of noise like spikes are generated. This noise is due to the fact that the vegetation is shaken by the wind and the matching between images has not been successful. Therefore, laser surveying that is not influenced by the wind is effective for surveying at places such as river banks where vegetation exists.
|Distance||Intensity ≧30%～200m over|
|FOV （Field Of View）||90°|
|Measurement accuracy||4mm@50m、20mm@150m （1σ）|
|Horizontal Position Accuracy||±10mm|
|Altitude Position Accuracy||±20mm|
* Accuracy is after post-processing with out cloud processing service
|Laser Scanner Unit “TDOT” (Patent Pending)|
|Data processing application (Need contract for Could Processing Service)|
|Hard carrying case|