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Canopy height Mapper: A google earth engine application for predicting global canopy heights combining GEDI with multi-source data
Environmental Modelling & Software ( IF 4.8 ) Pub Date : 2024-11-12 , DOI: 10.1016/j.envsoft.2024.106268
Cesar Alvites, Hannah O'Sullivan, Saverio Francini, Marco Marchetti, Giovanni Santopuoli, Gherardo Chirici, Bruno Lasserre, Michela Marignani, Erika Bazzato

Spatially and temporally discontinuous canopy height footprints collected by NASA's GEDI (Global Ecosystem Dynamics Investigation) mission are accessible on the Google Earth Engine (GEE) cloud computing platform. This study introduces an open-source, user-friendly, code-free GEE web application called Canopy Height Mapper (CH-GEE), available at https://ee-calvites1990.projects.earthengine.app/view/ch-gee, which automatically generates (10 m) high-resolution canopy height maps for a specific area by integrating GEDI with multi-source remote sensing data: Copernicus and topographical data from the GEE data catalogue. CH-GEE generates local-to-country scale calibrated canopy height maps worldwide using machine learning algorithms and leveraging the GEE platform's big data and cloud computing capabilities. CH-GEE allows customization of geographic area, algorithms and time windows for GEDI and predictors. Canopy heights generated by CH-GEE were validated using the Italian National Forest Inventory across 110,000 km2 at multiple scales (Country-based R-squared = 0.89, RMSE = 17%). CH-GEE's accuracy and scalability make it suitable for forest monitoring.

中文翻译:


冠层高度映射器:一个 google earth 引擎应用程序,用于结合 GEDI 和多源数据来预测全球冠层高度



NASA 的 GEDI(全球生态系统动力学调查)任务收集的空间和时间上不连续的树冠高度足迹可在 Google Earth Engine (GEE) 云计算平台上访问。本研究介绍了一种开源、用户友好、无代码的 GEE Web 应用程序,称为 Canopy Height Mapper (CH-GEE),可在 https://ee-calvites1990.projects.earthengine.app/view/ch-gee 使用,该应用程序通过将 GEDI 与多源遥感数据集成来自动生成特定区域的 (10 m) 高分辨率树冠高度图:哥白尼和来自 GEE 数据目录的地形数据。CH-GEE 使用机器学习算法并利用 GEE 平台的大数据和云计算功能,在全球范围内生成本地到国家比例的校准树冠高度图。CH-GEE 允许自定义 GEDI 和预测器的地理区域、算法和时间窗口。使用意大利国家森林清单在多个尺度上验证了 CH-GEE 生成的 110,000 km2 的冠层高度(基于国家的 R 平方 = 0.89,RMSE = 17%)。CH-GEE 的准确性和可扩展性使其适用于森林监测。
更新日期:2024-11-12
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