LiDAR (Light Detection and Ranging) is an optical remote sensing technology that can measure the distance to other features by illuminating the target with Light. LiDAR technology has been used in airplanes to measure features on Earth's surface, including determining a detailed elevation model. In locations where LiDAR data is available the ground surface elevation contours can be used to prepare both surface and subsurface field drainage patterns.
Click on the link below to download a PowerPoint presentation describing how to download and use LiDAR data. View the "Notes Page" of each slide to read explanations for that slide.