1, measuring rectangular coordinate system: the horizontal axis is Y axis and the vertical axis is X axis;

2. Mathematical rectangular coordinate system: the horizontal axis is the X axis and the vertical axis is the Y axis.

Second, the quadrants are different.

1, rectangular coordinate system: clockwise, I, II, III and IV quadrants in turn;

2. Mathematical Cartesian coordinate system: sorted counterclockwise, in order of quadrants I, II, III and IV.

Third, different origins.

1, measuring rectangular coordinate system: the coordinates (x0, y0) of the origin o are mostly two big positive integers, such as the origin coordinates x0=300000m, y0 = 500000m Beijing urban construction coordinate system;

2. Mathematical Cartesian coordinate system: the coordinate of origin O is x0=0, y0=0.

Introduction to some properties of mathematical coordinate system of extended data;

Points on the 1. coordinate plane have one-to-one correspondence with ordered real number pairs.

2. The horizontal and vertical coordinates of the points on the bisector of the quadrant angle are equal.

3. The horizontal and vertical coordinates of the points on the bisector of the second and fourth quadrants are reciprocal.

4. Move up and down a little, and the abscissa remains unchanged, that is, the abscissa of the point on the straight line parallel to the Y axis remains unchanged.

5. The abscissas of the points on the Y axis are all 0.

6. The ordinate of the point on the X axis is 0.

7. The points on the coordinate axis do not belong to any quadrant.

8. The abscissa of the point symmetrical about the X axis remains unchanged, and the ordinate becomes the reciprocal of the original coordinate. or vice versa, Dallas to the auditorium

9. The horizontal and vertical coordinates of a point symmetrical about the origin are the reciprocal of the original coordinates.

10, when symmetrical with x, x remains unchanged and y becomes the opposite number.