The invention discloses an optical
microwave cooperative inversion method and
system for an urban above-ground
biomass. The method comprises the steps of obtaining an AGB observation value of a samplebiomass by use of a
sample area single-
plant parameter
data set acquired by a ground surface observation test; performing pretreatment to obtain a
canopy height value CHM, surface reflectance data and a backscattering coefficient; extracting various
LiDAR variables based on the CHM data, and extracting multiple optical characteristic
vegetation indices based on the
optical surface reflectance data, and simultaneously extracting multiple
microwave characteristic variables based on the
microwave backscattering coefficient data; extracting a
biomass estimation value of an
LiDAR data coverage area; selecting a sample for subsequent modeling and
verification by use of a stratified random sampling method with the
biomass value of the
LiDAR data coverage area as a training and
verification sample set; screening out an optimal optical and microwave characteristic variable by use of a
variable screening method; and constructing an AGB-inverted optical model, a microwave model and an optical and microwave cooperative model, and selecting an optimal model to realize biomass inversion.