Mean height and variability of height derived from Lidar data and Landsat images relationship - Warren Cohen; Ruben Valbuena Puebla; GARCIA ABRIL, ANTONIO DAMIAN; MANZANERA DE LA VEGA, JOSE ANTONIO; ARROYO MÉNDEZ, LARA AINOA; Martin Fernandez, Susana; PASCUAL CASTAÑO, ISABEL CRISTINA (Proceedings Of Silvilaser 2008, 8th International Conference On Lidar Applications In Forest Assessment And Inventory, 2008)