Advances in study on grass height using remote-sensing monitoring

Grass height plays a vital role in grassland degradation, desertification assessment, remote-sensing monitoring of grassland aboveground biomass, and monitoring of pastureland snow disasters. However, highly accurate monitoring and mapping of grass height has always been a difficult issue in grassland remote-sensing research. In recent years, the continuous development of multispectral remote sensing, LiDAR remote sensing technology, unmanned aerial vehicles, and hyperspectral remote sensing technology has provided technical support for high-precision remote-sensing monitoring of grass height. Based on the review of remote-sensing monitoring of grass height, this paper summarizes the existing problems and prospects of grass height remote-sensing monitoring to provide assistance for high-precision remote-sensing monitoring of grass height.