Google Earth Engine（GEE）——GEDI L2A Vector Canopy Top Height (Version 2) 全球生态系统数据集

The Global Ecosystem Dynamics Investigation (GEDI) mission aims to characterize ecosystem structure and dynamics to enable radically improved quantification and understanding of the Earth's carbon cycle and biodiversity. The GEDI instrument, attached to the International Space Station (ISS), collects data globally between 51.6° N and 51.6° S latitudes at the highest resolution and densest sampling of the 3-dimensional structure of the Earth.

GEDI's Level 2A Geolocated Elevation and Height Metrics Product (GEDI02_A) is primarily composed of 100 Relative Height (RH) metrics, which collectively describe the waveform collected by GEDI.

The original GEDI02_A product is a table of point with a spatial resolution (average footprint) of 25 meters. The GEDI L2A Monthly raster data can be found in the image collection LARSE/GEDI/GEDI02_A_002_MONTHLY.

The GEDI L4B biomass data can be found in the image LARSE/GEDI/GEDI04_B_002.

全球生态系统动态调查 (GEDI) 任务旨在表征生态系统结构和动态，以从根本上改进对地球碳循环和生物多样性的量化和理解。附属于国际空间站 (ISS) 的 GEDI 仪器以地球 3 维结构的最高分辨率和最密集采样收集全球北纬 51.6° 至南纬 51.6° 之间的数据。

GEDI 的 2A 级地理定位高程和高度度量产品 (GEDI02_A) 主要由 100 个相对高度 (RH) 度量组成，它们共同描述了 GEDI 收集的波形。

最初的 GEDI02_A 产品是一个空间分辨率（平均足迹）为 25 米的点表。GEDI L2A 月度栅格数据可在影像集 LARSE/GEDI/GEDI02_A_002_MONTHLY中找到。

GEDI L4B 生物量数据可以在图像 LARSE/GEDI/GEDI04_B_002中找到。

请参阅用户指南 了解更多信息。

Dataset Availability

2019-03-25T00:00:00Z - 2023-01-01T00:00:00

Dataset Provider

USFS Laboratory for Applications of Remote Sensing in Ecology (LARSE) NASA GEDI mission, accessed through the USGS LP DAAC

代码：

var dataset = ee.FeatureCollection('LARSE/GEDI/GEDI02_A_002/GEDI02_A_2021244154857_O15413_04_T05622_02_003_02_V002');
dataset = dataset.style({color: 'black',  pointSize: 1});
Map.setCenter(-64.88, -31.77, 15);
Map.addLayer(dataset);

使用条款

该数据集属于公共领域，可以不受限制地使用和分发。有关更多信息，请参阅NASA 的地球科学数据和信息政策 。

• LP DAAC - GEDI02_A

Citations:

• GEDI L2A Elevation and Height Metrics Data Global Footprint Level - GEDI02_A Dubayah, R., M. Hofton, J. Blair, J. Armston, H. Tang, S. Luthcke. GEDI L2A Elevation and Height Metrics Data Global Footprint Level V002. 2021, distributed by NASA EOSDIS Land Processes DAAC. Accessed YYYY-MM-DD.