测量学主要是一种研究地球形状、大小以及地表上各物体的几何形状与空间位置，并利用适当方法和仪器对空间中的物体进行搜集、分析、加值、集成、管理......等方法，让人理解其空间上的关系，以利规划与利用

测量在中国大陆、**、日本等地区一般指「测绘」；在香港延续英国的测量师业务，含义扩大，测量师大致可以分为以下分支：

Surveying or land surveying is the technique, profession, and science of determining the terrestrial or three-dimensional position of points and the distances and angles between them. A land surveying professional is called a land surveyor. These points are usually on the surface of the Earth, and they are often used to establish land maps and boundaries for ownership, locations like building corners or the surface location of subsurface features, or other purposes required by government or civil law, such as property sales.