Elevation measurement method?

The elevation measurement method comprises the following steps:

(Premise: there are known joint survey elevation points)

1. Calculate the height difference between the known point and the fixed point by leveling, plus the elevation of the known point. -Leveling is divided into first-class to fourth-class and super-class;

2. Solve the problem by trigonometric leveling, that is, measure the slope angle and oblique distance between the known point and the to-be-fixed point, and then calculate the height difference by trigonometric function, plus the elevation of the known point-at present, rangefinder and total station are very common, and trigonometric leveling is very convenient, so trigonometric leveling can be replaced by trigonometric leveling when the accuracy requirement is not too high.

3. Measuring elevation with barometer is the simplest method, but it is also the method with the lowest accuracy.

4, high-precision GPS joint measurement, plane coordinates and elevation observation and calculation at the same time, the accuracy is also good.