Airborne LiDAR reveals a spectacular landform record

Long-term preservation of landforms produces a geological record that can be used to unravel past Earth surface processes in space and time. Identification and analysis of landforms has been revolutionized by the availability of high-resolution (metre-scale) topographic survey data covering extensive areas, using Light Detection and Ranging (LiDAR). Airborne LiDAR has been in widespread use for over two decades; but due to increasing availability of data, some regions are only just beginning to be ‘explored’ in this way. In this article, we showcase high-resolution topography derived from airborne LiDAR survey data across South Island, New Zealand. We evidence a variety of tectonic, glacial, fluvial, hillslope and other landforms hitherto undetected within mountainous areas and beneath forests. We discuss how the characteristics of shape, size, position and association can differentiate landforms from one another, and how combinations of landforms enable landsystems to be identified that are diagnostic of past environmental conditions.