Ordnance Survey map
noun /ˌɔːdnəns ˈsɜːveɪ mæp/
/ˌɔːrdnəns ˈsɜːrveɪ mæp/
- a very detailed map of an area of Britain or Ireland, prepared by an organization called the Ordnance Survey, which is supported by the government
(由英国或爱尔兰政府资助的全国地形测量局所绘制的)全国地形测绘详图