Lidar data is initially collected as a “cloud of individual points reflected by everything on the surface, including structures and vegetation”, a digital elevation model (DEM) · What types of elevation. Light detection and range, or LIDAR, is a remote sensing technology that uses pulsed laser energy (light) to measure ranges (distance). Engineers and earth scientists use LIDAR to map and measure with precision and precision the natural and constructed features of the Earth's surface, inside buildings, underground and in shallow water. It has wide applications in many industries, such as engineering and public safety.
Bathymetric Lidar is used to measure elevations at the bottom of a column of water, such as the seabed. It is an airborne LiDAR data collection technology, but instead of using an infrared wavelength (such as the LiDAR used to study topography), bathymetric LiDAR uses a green wavelength to penetrate the water column. LiDAR systems take advantage of this technology and use LiDAR data to map three-dimensional models and digital elevations. In addition, the software offers a function that delimits the data area from the raw LIDAR points, the creation of intensity images and the ability to update the attributes of the selected LIDAR data sets.
Topographic LIDAR usually uses a near-infrared laser to map the land, while bathymetric LIDAR uses green light that penetrates the water to also measure the elevations of the seabed and riverbeds. Some of the interesting functions include spatial analysis, such as the generation of point cloud contours, the segmentation and interpolations of LIDAR, the conversion of data to different formats, such as ASCII and shapefiles, and the cleaning of point cloud data (5 best free tools and applications of LiDAR software, 2002).