VibrantForests搞了个新框架,用卫星和激光雷达做出全美10米分辨率森林地图,比老模型更准,不饱和不回归均值。
VibrantForests框架融合国家森林清查、机载激光雷达和卫星图像,以10米分辨率生成美国本土全区域的森林结构属性图。该模型同时估计冠层覆盖、冠层高度、地上活树生物量、断面积和二次平均直径五项指标。模型扩展了常见被动传感器模型的饱和范围,并减少了回归均值行为(稀疏条件下高估、密集条件下低估)。该框架能以年度节奏提供连贯的全区域森林管理相关属性估计。
Integrating national forest inventory, airborne lidar, and satellite imagery for wall-to-wall mapping of forest structure with computer vision
Remote sensing is increasingly relied upon to deliver actionable science for forest and wildfire risk management across large landscapes. Wall-to-wall, annually updated maps are a persistent need for effective forest management. Many planning systems and data collections combine disparate data sources with different purposes, vintages, and prediction quality, which leads to confounding behavior in operational planning systems. We introduce the VibrantForests framework, developed and applied to map forest attributes and provide a coherent foundation for effective forest and wildfire planning. VibrantForests includes a satellite-based forest structure model trained on lidar-derived samples and applied across the contiguous United States to concurrently generate estimates of canopy cover, canopy height, aboveground live tree biomass, basal area, and quadratic mean diameter at 10-meter resolution. We demonstrate predictive capability spanning the full spectrum of forest conditions ranging from sparse-canopy/low-biomass to dense-canopy/high-biomass. Results show that our model extends the range at which saturation is commonly encountered in comparable passive-sensor models, and reduces regression-to-mean behavior that commonly produces overestimation of forest attributes in small/sparse conditions and underestimation in large/dense conditions. The VibrantForests framework addresses a key limitation in large-area forest and wildfire planning by delivering coherent wall-to-wall estimates of management-relevant attributes at annual cadence and 10m resolution.