Constructing a dem from grid-based data by computing intermediate contours.

Michael B. Gousie Wm. Randolph Franklin Constructing a dem from grid-based data by computing intermediate contours. 71-77 2003 conf/gis/2003 GIS http://doi.acm.org/10.1145/956676.956686 db/conf/gis/gis2003.html#GousieF03