First determine the observation point, draw the selected observation point in the center of the plane, and then determine the direction of each object relative to the observation point. Draw on a piece of paper according to "up north and down south, left west and right east", and mark the north with the arrow "".

South and north are opposite, west and east are opposite, northwest and southeast are opposite, and northeast and southwest are opposite. The southeast and northwest are arranged clockwise, and the map is usually drawn according to "upper north and lower south, left west and right east".