The directions commonly used by people are mainly up, down, east, west, south and north. On the earth, the direction pointing to the center of the earth is down, the direction facing the center of the earth is up, and the up and down are vertical. On the ground plane, east (due east), west (due west), south (due south) and north (due north) are the four basic directions.
The determination of the direction on the earth is related to the rotation of the earth. From north to south, people call the direction of the earth's rotation from west to east. On the earth, the direction along the earth's rotation is east, the direction against the earth's rotation is west, and the horizon direction perpendicular to the east-west direction is called north-south direction.
Method of judging direction
1, general orientation method: map-oriented "up north and down south, left west and right east".
2. Determine the direction according to the beacon: generally, the arrow pointing to the beacon on the map indicates the true north direction.
3. Determine the direction according to the longitude and latitude network: longitude indicates the north-south direction and latitude indicates the east-west direction.