Towards an operational MODIS continuous field of percent tree cover algorithm: examples using AVHRR and MODIS data

作者: M.C Hansen , R.S DeFries , J.R.G Townshend , R Sohlberg , C Dimiceli

DOI: 10.1016/S0034-4257(02)00079-2

关键词: Environmental scienceRemote sensingAdvanced very-high-resolution radiometerLand coverDecision treeCover (algebra)Tree (data structure)Data setModerate-resolution imaging spectroradiometerVegetationAlgorithm

摘要: The continuous fields Moderate Resolution Imaging Spectroradiometer (MODIS) land cover products are 500-m sub-pixel representations of basic vegetation characteristics including tree, herbaceous and bare ground cover. Our previous approach to deriving used a linear mixture model based on spectral endmembers forest, grassland training. We present here new for estimating percent tree employing training data over the whole range set is derived by aggregating high-resolution coarse scales with multi-temporal metrics full year resolution satellite data. A regression algorithm predict dependent variable signatures from multitemporal metrics. automated was tested globally using Advanced Very High Radiometer (AVHRR) data, as MODIS has not yet been collected. root mean square error (rmse) 9.06% found global set. Preliminary also presented, 250-m map lower 48 United States maps leaf type North America. Results show that offers an improved characterization

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