TY - CPAPER AU - Hiroyuki Miyazaki AU - Koki Iwao AU - Ryosuke Shibasaki BT - 3rd Geospatial Information Forum for Students and Young Engineers CY - Osaka, Japan DA - 2011 LA - eng PP - Osaka, Japan PY - 2011 T2 - 3rd Geospatial Information Forum for Students and Young Engineers TI - A Crowd-Sourcing System with Web Mapping Systems for Ground Information Database of Global Urban Area Mapping ER -