What is a lidar system?

Also known as LIDAR flight, it is the result of mounting a LIDAR sensor on a drone. The LIDAR system is mainly composed of the following components:

  • The LIDAR sensor is the one that generates the laser beams that bounce off the natural terrain.
  • IMU is the inertial motion system that measures the variations in the three axes.
  • GNSS is the global positioning system that  locates the system on the earth.
  • Photographic camera in case you want to add color to the points.
  • Graphic representation of the LIDAR survey service with drones.
Graphic representation of the LIDAR survey service with drones.

What are the advantages?

Advantages:

  • The LIDAR systems allow performing terrain surveys in areas of thick vegetation where photogrammetry is not suitable.
  • It is an appropriate method to cover large areas.
  • Information discrimination is more accurate because it has more intense variables plus color and coordinate variables.
  • Because it is a direct measurement system, it is more accurate in Z.
  • It provides the precise value of the natural terrain.

Disadvantages:

  • More expensive.
  • Not ideal for generating an orthomosaic during lidar data acquisition
Representative icon of a topographic scan. Service performed in Juarez Thompson.

LIDAR SURVEYING SERVICE USES:

  • Quantification of bulk material inventory volume
  • Pits update in the mining industry
  • Topography of lots with vegetation
Representative icon of a 3D laser scan. Service offered by Juarez Thompson.

DELIVERABLES INCLUDE:

  • Level curves
  • Sections and profiles
  • Digital Elevation Model
  • Point Clouds

How does LIDAR technology work?

A lidar sensor is a device that measures the distance to an object by sending laser pulses and calculating the time it takes for the pulse to return. This principle is known as indirect measurement.

The LIDAR sensor is made up of three main parts:

  • A laser that sends laser pulses at objects.
  • A rotating mirror that measures the angle of the laser concerning the sensor.
  • A backscatter detector that measures the amount of light returning to the sensor.

LiDAR measurement is done by sending a laser pulse from the sensor towards the object. The time it takes for the pulse to return is measured and used to calculate the distance to the object.

The LIDAR sensor can measure objects in a range of 0.5 to 100 meters or more, depending on the model. LIDAR sensors are highly accurate and can measure objects with an accuracy of up to 2 cm.

What is a point cloud and what is it used for?

The point cloud is a set of three-dimensional points that represent the terrain. Each point in the point cloud has an X, Y, and Z coordinate value. The density of the point cloud depends on the size of the area and the accuracy needed.

What is the point cloud used for?

The point cloud is used to create digital models of a surface, calculate slopes and volumes, and visualize the terrain in 3D.

All kinds of objects of interest, including buildings, bushes, poles, cables, points on a surface, and other constructions can be accurately and automatically extracted from point clouds.

In summary, our main objective of obtaining a point cloud is to facilitate work in our sectors, as well as to obtain fast products, reduce costs, reduce project development times and obtain better quality results and information with the point cloud.

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