Jin-Seon Lee Seung Jong Chung Reconstruction of 3-D Terrain Data from Contour Map. 281-284 1994 MVA http://b2.cvl.iis.u-tokyo.ac.jp/mva/proceedings/CommemorativeDVD/1994/papers/1994281.pdf conf/mva/1994 db/conf/mva/mva1994.html#LeeC94