TY - JOUR A1 - Zhang, J. X. A1 - Lin, X. G. T1 - OBJECT-BASED CLASSIFICATION OF URBAN AIRBORNE LIDAR POINT CLOUDS WITH MULTIPLE ECHOES USING SVM JO - ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci. J1 - ISPRS-Annals VL - I-3 SP - 135 EP - 140 Y1 - 2012/07/20 PB - Copernicus Publications SN - 2194-9050 UR - https://isprs-annals.copernicus.org/articles/I-3/135/2012/ L1 - https://isprs-annals.copernicus.org/articles/I-3/135/2012/isprsannals-I-3-135-2012.pdf DO - 10.5194/isprsannals-I-3-135-2012 ER -