Lidar, mentioned in the article, has also been used in Central America: http://www.caracol.org/include/files/chase/CCW2013.pdf http://www.caracol.org/include/fi

Lidar, mentioned in the article, has also been used in Central America: http://www.caracol.org/include/files/chase/CCW2013.pdf http://www.caracol.org/include/files/chase/CCW2013.pdf It's a really clever, very simple technique: by taking the furthest return, you can see through gaps in the forest canopy to get a high-resolution map of surface topography beneath it.