When calculating land area, my country currently uses the legal units of measurement: square kilometers, square meters, and hectares. However, in Northeast China, the unit "垧" is commonly used. So, how many mu (a unit of land measurement) are in one "垧" in Northeast China? The details are as follows:
How many acres is one hectare of land in Northeast China?
A *xiang* is a unit of land area, commonly known in Northeast China. It is approximately equal to 15 mu (approximately 1 hectare). It is formally referred to as a hectare, meaning 1 *xiang* = 1 hectare = 10,000 square meters = 15 mu (approximately 1.65 hectares).
How is land area calculated?
1. Direct measurement method
This means direct measurement using methods such as ropes, measuring tapes, or pacing. The formula is: length (meters) × width (meters) × 0.0015 = mu (a Chinese unit of area, approximately 0.0015 acres).
2. Trigonometric Formula Method
When using the trigonometric formula to measure land area, it is necessary to measure the coordinates of the four vertices of the plot, then connect these four points in sequence to form two triangles, and then use the triangle area formula (1/2 × base × height) to calculate the sum of the areas of the two triangles, which is the land area.
3. Image interpretation method
Image interpretation is a method that uses satellite remote sensing, aerial photography, and other means to acquire image data of the land, and then uses computer technology to interpret it in order to determine the land area.
4. Coordinate method
The coordinate method involves measuring the coordinates of the inflection points of an irregular plot of land and then using the coordinate method area calculation formula to calculate the area of the plot.
5. Instrumental Method
The commonly used instrument is the GPS area measuring instrument, which integrates a high-precision GPS positioning system, an accurate area calculation method, and an intelligent handheld computer system. It can realize real-time testing of irregular areas, dynamic graphic display, and intelligent data processing and storage.
6. Software Law
Install an app for measuring land area on your phone. It uses a point-marking method on a map to measure the area of multiple plots of land continuously.
