Calibrated Landsat TM LAI retrieval for monitoring vegetation cover change after ecological releases to the lower Tarim river
IGARSS（2012）
摘要
This study used high resolution images as a ground measurement tool for a region, where mapping of spatial and temporal vegetation cover variation by ground survey is impossible. Leaf Area Index (LAI) maps were derived from DigitalGlobe or GeoEye images and resampled to 30m resolution. Landsat TM imagery was used to produce NDVI maps. The NDVI from TM and LAI from high resolution images show good correlation for the three test sites chosen in the lower Tarim river basin. The correlations were then used to produce LAI maps on river basin scale from Landsat TM imagery. The results showed that this method provides good local calibration for converting NDVI maps from Landsat TM imagery to LAI maps to be used in hydrological modeling.
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关键词
calibration,temporal vegetation cover variation mapping ground survey,image resampling,tarim river,vegetation cover change monitoring,high resolution image,image resolution,china,digitalglobe image,rivers,calibrated landsat tm lai retrieval,hydrological techniques,geoeye image,ndvi,hydrological modeling,lower tarim river basin,ecological release,image sampling,leaf area index,geophysical image processing,spatial vegetation cover variation mapping,ground measurement tool,vegetation cover,lai map,ndvi map,landsat tm imagery,landsat tm,leaf area index (lai),vegetation mapping,vegetation,ecology,spatial resolution,satellites,remote sensing,earth
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