From the course: Reality Capture Foundations for AEC
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LIDAR: What it is
- LiDAR uses ultraviolet, visible, or near infrared light to image objects. It measures distance to a target by illuminating the target with a laser, and measuring the reflected light with a sensor. Differences in laser return times and wavelengths can then be used to make digital 3D representations of the target. There are two main types of LiDAR, mobile and static. Both typically use eye-safe lasers and are usually invisible to the eye. As their descriptions imply, mobile LiDAR equipment is designed to move and calculate XYZ position while in motion, which can be accomplished by walking with a scanner in hand, in a backpack, or mounted on a moving vehicle using a GPS or inertial measurement unit, or IMU, or both. To calculate the sensor position and thereby correct the distance to the reflected laser. These are typically less accurate than static scans. Static scans are just that. They don't move in a vector. These…
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