An Ordnance Survey(OS) grid reference gives the position of a place to within 100 metres. 全国地形测量局的地图坐标标示某地的位置精确到100米以内。
A spokesman for Ordnance Survey(OS) said : ' Map reading, whether on a paper map or digital device, is an essential skill which could save your life. 英国地形测量局一名发言人表示,无论是看纸质地图还是电子地图,看地图都是一项重要技能,说不定还能挽救你的生命。
Mapping agency Ordnance Survey(OS) ( OS ) has launched a service offering free and unrestricted access to most of its map data. 英国地形测量局发起一项免费服务,用户可以免费、无限制地获得其绝大部分地图数据。
The Ordnance Survey(OS) : A Perspective of Surveying and Mapping in Britain 从军械测量(OS)局看英国测绘
Especially, if the project area once experienced wars in history, to detect the hidden unexploded ordnance left with magnetic survey, for the purpose of safety, is effective and important. 特别是在历史上曾经发生过军事争斗的地区进行工程建设,投入磁法普查寻找炸弹类危险爆炸物,是保证工程建设安全进行的基础工作。