db/conf/gis/Voisard98.html Agnès Voisard Geologic Hypermaps are More Than Clickable Maps! 14-19 GIS1998/P014.pdf 1998 conf/gis/98 ACM-GIS http://doi.acm.org/10.1145/288692.288697 db/conf/gis/gis98.html#Voisard98