Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Passage: Ihe oyiyi ihe oyiyi sitere na 15 mita nke mkpebi ruo 15 sentimita. Maka ọtụtụ akụkụ ụwa, Google Earth na-eji data elevation dijitalụ nke NASA's Shuttle Radar Topography Mission na-anakọta. Nke a na-eme ka e nwee echiche nke ala nwere akụkụ atọ, ọbụna ebe ihe osise ahụ bụ nanị akụkụ abụọ.  Ajụjụ: Gịnị bụ nke kasị nta mkpebi oyiyi nwere ike ịbụ?
15 sentimita