Popular science knowledge: how is the altitude of the mountain measured?

Guide: In order to facilitate the measurement, people set up markers scattered everywhere. The monument marks the exact height according to the standard base point. We can measure the height of the monument on the top of the mountain with standard measurement methods.

Elevation refers to the vertical distance between a point on the ground or building and the horizontal plane as a benchmark.

What can be called the starting point of height is called the standard base point. The height base point of Japan is from the sea surface of Tokyo Bay to the height of 24.4438+040m.

How to measure the height difference between two points by standard measurement? The method is to measure the scale of the tree at two points with a level (horizontal telescope) installed right in the middle of the two points. In this way, we know the difference between the scales of two points, that is, the difference in height.

In order to facilitate the measurement, people set up marks scattered everywhere. The monument marks the exact height according to the standard base point. We can measure the height of the monument on the top of the mountain with standard measurement methods.

But recently, people often use aerial photography to measure, which saves time and effort and is accurate.