1, definition and application: Azimuth, also called horizon longitude, is the horizontal included angle clockwise from the northbound line of a certain point to the target direction line. It is usually used to determine the direction, indicate the target and keep the direction of travel. It is widely used in satellite receiving antenna, aviation, navigation, artillery shooting and army marching. Direction angle refers to the azimuth angle determined by taking the coordinate axis direction as the standard direction. Specifically, it is the angle formed by the rotation of the direction line to the target with the observer's position as the center and the direction due north or south as the starting direction, usually expressed as north (south) east (west) ×× degrees. Used in mathematics to determine the direction of a vector.

2. Range: Azimuth usually ranges from 0 to 360, representing a complete circumferential angle. The range of direction angles is different. Generally measured from the direction of due north or due south, the angle value is between 0 and 90. This range reflects that the direction angle is mainly used to describe the direction change less than the right angle.

3. Essential difference: Azimuth describes the spatial position of the target point in the reference system, which is the included angle from the origin of the reference system to the target point along an axis (usually X axis) of the reference system. Direction angle describes the minimum included angle required for an object to move in a certain direction from the origin of the reference system. To sum up, there are significant differences between azimuth and azimuth in definition, application, value range and essential characteristics.