Vegetation Continuous Fields (VCF) version 6.1

The Vegetation Continuous Fields (VCF) yearly product is a global representation of surface vegetation cover as gradations of three ground cover components: percent tree cover, percent non-tree cover, and percent non-vegetated (bare). VCF products provide a continuous, quantitative portrayal of land surface cover at 250 meter (m) pixel resolution, with a sub-pixel depiction of percent cover in reference to the three ground cover components. Proportional estimates of cover are developed from global training data derived using high-resolution imagery (NASA-MODIS). The training data and phenological metrics are used with a regression tree to derive percent cover globally. The model is then used to estimate areal proportions of life form, leaf type, and leaf longevity. The data is available since 2001.

植被连续场（Vegetation Continuous Fields, VCF）年度产品是一套全球地表植被覆盖表征数据集，将地表植被覆盖表示为三类地面覆盖组分的百分比梯度：树木覆盖百分比、非树木覆盖百分比以及无植被（裸地）百分比。VCF数据集以250米（m）的像元分辨率实现地表覆盖的连续定量刻画，并针对上述三类地面覆盖组分实现亚像元级的覆盖百分比表征。覆盖比例的估算值依托基于高分辨率影像（NASA-MODIS）生成的全球训练数据集构建。该训练数据集与物候参数结合回归树模型，可在全球范围内推导得到各组分的覆盖百分比。随后该模型可用于估算植被生活型、叶片类型及叶片寿命的面积占比。该数据集自2001年起正式对外提供。

搜集汇总

背景与挑战

背景概述

Vegetation Continuous Fields (VCF) version 6.1是一个全球性的植被覆盖数据集，提供从2001年开始的年度数据，以250米分辨率量化树木、非树木和非植被覆盖比例。该数据集基于NASA-MODIS高分辨率影像和回归树模型生成，适用于农业和环境科学研究。