Several Methods for Measuring Land Area in Plane Land area measurement has many applications, such as land use status survey, farmland land area measurement, house area measurement, etc., all need to determine the area of ​​land. There are many ways to measure the land area, such as the instrument method, analytical method, and the most commonly used meter acre method. In the actual selection process, we need to consider the digital source, the size of the area to be measured, and the requirements for accuracy, to choose the appropriate method or combine the above methods to obtain the area of ​​the land. Here we analyze the following major methods. Mu Meter: The Mu Meter is also called an area meter and is suitable for rapid and accurate measurement of land area. The acre meter uses a GPS positioning system to measure the latitude and longitude information of the current location while measuring the area. In addition, the display result of the Mu meter displays in two units: acres and square meters. There are certain errors in determining the land area with the Mu meter, but the larger the area, the smaller the error, because when the land area is relatively large, we suggest to choose the Mu meter to measure. Device Law: There are two kinds of device methods, including the planimeter method and the die method. The planimeter's measurement area is most suitable for irregular patterns with large areas and similar length (the area on the general graph should be less than 1 cm2). In the case of the same area, the greater the difference between the lengths, the greater the error; Figure less than 1 cm2 in the figure, generally should not be measured using the planimeter method, less than 5 cm2 of the spot, with the amount of planer It is not ideal. The mould method is labor-intensive and prone to gross errors. Analytic method: The analytical method is mainly used to accurately measure the area in the field. Its measurement accuracy is high and it is suitable for the calculation of the control area. However, the basic data required by the analytical method must be accurate and reliable, and the data measured by the tape measure, rope, and general compass instrument cannot be used as the basis for the analytical method to calculate the area. Therefore, the scope of application of this method is limited in practical work. At the same time, this method does not apply to the curve-like pattern of the spot boundary.
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