LiDAR technology has become a prominent technique for acquiring highly dense and accurate information for physical features of the earth. As LiDAR technology is a nonselective acquisition method, the acquired data consists of a point cloud that includes bare-ground and non-ground objects such as trees, roads and buildings. Filtering methods which involves removing of non-ground points, have been the need of various analysts for surface creation or feature extraction. Various applications exist to perform one function or the other such as some support surface creation, a few allow filtering of data whilst others allow analysis of created surface or create derivatives. These daunting task of working with Lidar file (LAS) is made easier with MapInfo Professional. Processing of single or multiple las file, generating surface based on various lidar parameters such as elevation, intensity, scan angle, classification etc., extracting required classification from classified raster, providing custom projection information is just a button click away with Raster tool of MapInfo Professional.
Various lidar dataset are available in public domain for US. A few important ones are
Once the lidar dataset is acquired from any of the above weblinks or others, a few steps need to be performed in MapInfo Professional to slice and dice bare ground and non-ground objects to create raster surface. So here are the steps to create bare-ground elevation surface using multiple lidar files (*.las) using MapInfo Professional.
Raster surface with bare earth model has applications in various verticals. Multiple product derivatives can be generated such as elevation profile which is extremely useful for flood underwriters and risk analysts, slope and aspect information to understand landslide risks, and many more. Besides sculpting bare ground elevation, canopy height models, understanding forest structure and shape of the trees, light intensity and more can be derived from single lidar file. So, what are you waiting for? Grab a copy of MapInfo Professional and start exploring lidar!!