What is commonly used as the unit to measure the land area and what is used as the unit to calculate the larger land area?

"Square meter" is usually used as the area unit for measuring and calculating the land area, and "hectare" is usually used as the area unit for a larger area.

Extended data:

calculate

When the land area is small and irregular, it is divided into several triangles, and the area of each connected triangle is calculated by Hailong formula, and then added.

The accurate measurement of a large area of land is divided into small areas, measured block by block, and then added up.

The rough survey of large-scale land is to draw a map first and then measure it on the map.

Measurement methods on drawings:

1. Cut the area to be measured on the map according to the boundary, and weigh it with a balance with high precision (such as 0.0 1g). Then cut the edge part cut on the same drawing into a rectangle with regular area, calculate the area and weigh it.

According to the area weight: area = weight of edge part: area of edge part, the area of this area on the map can be calculated and multiplied by the scale. If there is no balance with higher precision, you can also stick the whole picture on a rubber plate with uniform thickness, weigh it with a scale and calculate it in the same way as above.