Advances in technology paved the way for 3D mapping software in mapping. It enables engineers, architects, GIS professionals, architects and other professionals in related fields to obtain better accuracy in their mapping requirements. 3D land surveying services utilize this technology in generating high-definition models of lands, whether for forestry, mining, infrastructure or construction projects. The LIDAR (Light Detection and Ranging) mapping is utilized by professionals due to its speed, efficiency and preciseness as well as the high-density elevation information gathering mapping application for map creation. Other software exists which enable direct access, editing, visualization, and analysis of a wide range spatial data and CAD modeling using AutoCAD software.
An Overview of Laser Scanners
In surveying, the usage of three-dimensional scanning is performed. It is a procedure utilizing ultra-fast lasers that shoot at incredible rates per second. There are two widly-used scanners, Phase-Based and Time of Flight.
A fixed light beam of laser energy is released from a laser scanner and the phase change of the light beam is measured, enabling distance calculation. The main benefit of this is to capture higher points up to 2,000,000 points / second. However, data is captured in a short 30-meter range.
Light is released through the scanner in the time of the flight scanner. The length of time it takes for a pulse to transport from the laser scanner to the destination point and back is calculated, enabling the distance calculation of the equipment. Its main advantage is evident in its longer distance land scanning ability. However, it does not gather similar number of points with that of the phase-based scanner. To date, it only gathers 50,000 points / second.
For the above comparison, the phase-based innovation is used inside while time of flight is utilized outside. However, both technologies are often employed by firms to get better results.
Key Benefits of Laser Scanners in 3D land surveying
This mapping innovation enables topographic surveys with quicker resolution without overspending. Compared to traditional mapping techniques, it gives freedom to engineers, architects and surveyors to undertake multiple projects in a short time with a limited budget. It allows professionals to survey with high-precision images, especially through LIDAR (Light Detection and Ranging). It has almost replaced traditional mapping methods which used stereo plotter and stereo imaging.
Before, aerial and ground surveying were the major information collection sources for Digital Elevation Models (DEM). These survey techniques for angle measurement and distance employed different mapping tools to generate precise elevations at specific points. However, they could only cover limited areas at a slow pace. If surveyors needed larger mapping services, they had to employ a large network of points or coordinates. Recent digital mapping or GPS innovations enhancement speed and precision in modern mapping.
LIDAR mapping and DEM become a necessity in every mapping task among professionals. The unprecended speed and accuracy of 3D has become a driving force in the industry.