The first method: orderly number pairs positioning, such as the number of seats in the cinema. Direction and distance, such as how far an angle is from a fixed object in the south of the east; Determination of longitude and latitude. If you want to find a point with symmetry axis, cross this straight line as the symmetry point of this point.

The second method: using the sunny sun, according to the sunrise and sunset, we can easily know the east and the west, so we can judge the profile, but it can only be a rough estimate.

The third method: you can determine the orientation according to the house. Generally speaking, the balcony of a house faces south. You can find a residential area and determine the north and south.

Extended data:

The two main factors that determine the position of an object are: direction and distance.

(1) According to the characteristics of the data in the stem, the scale of the designated line segment is as shown in the figure: 1 The length of the small line segment indicates the actual distance of 20m, 3.5×20=70 (m), and the point B is 70m at 30 northwest of the center.

(2)60÷20=3 (bar) and 80÷20=4 (bar), so point C is in the square.