To advance the world’s geographic knowledge, explorers used to have to head out to sea, enduring inclement weather and debilitating disease, unsure of where they were going – or whether they would ever return home.
为了推动世界地理知识的发展，探险家们曾经被迫出海，忍受疾病和恶劣的天气。他们不清楚要去哪，也不清楚能否平安返回。虽然今天的在线测绘者们并未面临着同样的风险，但他们同样踏上了一条探索未知、激情和美好生活之路。