That meant he measured land, marking its boundaries.
这意味着他测量土地, 标记其边界。
英语百科
Landmark
A landmark is a recognizable natural or artificial feature used for navigation, a feature that stands out from its near environment and is often visible from long distances.
In modern use, the term can also be applied to smaller structures or features, that have become local or national symbols.
英英词典
land mark n.
the position of a prominent or well-known object in a particular landscape
synonymous: landmark
an event marking a unique or important historical change of course or one on which important developments depend
synonymous: landmark, turning point, watershed
a mark showing the boundary of a piece of land
synonymous: landmark
an anatomical structure used as a point of origin in locating other anatomical structures (as in surgery) or as point from which measurements can be taken