Show HN: High-resolution surface analysis with Lidar data

High-resolution surface analysis with LiDAR data Introduction Airborne LiDAR uses hundreds of thousands of laser pulses per second to generate detailed 3D maps, even through vegetation. With high point densities and 10 cm accuracy, it is among the most effective methods for mapping topography. Source SwissTopo The Swiss Federal Office of Topography (Swisstopo) provides a highly precise digital elevation model based on LiDAR data, called swissALTI3D. Buildings and vegetation are removed, revealing the underlying topography. The data is delivered as a GeoTIFF tiles with 2000px × 2000px resolution representing 1km × 1km areas (resolution of 0.5m). The full list of all tiles is provided here. Note Swisstopo uses the Swiss coordinates system LV95, aka. EPSG:2056. LiDAR has some interesting use cases in archaeology (Caspari, 2023), particularly for uncovering man-made structures that are hidden beneath vegetation or subtle terrain changes. It allows archaeologists to identify features ... Read full article.