Coordinate calculation is generally mainly used in surveying and mapping engineering and construction engineering, specifically in architectural design, engineering survey, surveying and mapping and other fields. Generally speaking, coordinate calculation is divided into two types: coordinate forward calculation and coordinate reverse calculation, which are more common in practice.

inverse calculation of coordinate

According to the coordinates of the starting point and ending point of a straight line, the process of calculating the horizontal distance and coordinate azimuth of a straight line is called coordinate inverse calculation.

Coordinates are

The process of calculating the coordinates of the end point according to the coordinates of the starting point, the horizontal distance and the azimuth of the straight line is called coordinate forward calculation.

Extended data

Latitude and longitude are the most commonly used global coordinate systems, longitude, latitude and elevation. (excluding projection) The datum plane is determined by the 0 meridian and the equator. Therefore, the earth is divided into 180 longitude from Greenwich to the east and west respectively. Starting from the equator, it is divided into 90 degrees south latitude and 90 degrees north latitude. Elevation is calculated from the center of the earth, but different definitions are still different.

Units are sexagesimal (degrees: minutes: seconds, with letters indicating the direction) or decimal (plus/minus decimal degrees). It can also be called the real world coordinate system, which is used to determine the position of ground objects on the earth.

A specific geographical coordinate system consists of a specific ellipsoid and a specific map projection, in which the ellipsoid is a mathematical description of the shape of the earth, and the map projection is a mathematical method to convert spherical coordinates into plane coordinates. Most maps display coordinate data according to a known geographic coordinate system.