div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: pubsusgsgov · Amazon basin Sonar enabled cartographers to map the ocean floor In 1975 a satellite gave cartographers their first global view of the Earth 1976—General Electric src=https:reader034fdocumentsusreader034viewer20220423135edce25fad6a402d6667c10ehtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdiv