# what arccos

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### The distance is calculated based on the longitude and latitude of two points. The distance is calculated based on the latitude and longitude of two points.

Calculate the Distance Based on the longitude and latitude of two points How are these cable cables determined? The earth is constantly rotating around the Earth's axis (the Earth's axis is a path through the north and south poles of the Earth and

### MySQL user-defined function to obtain the distance between two points

CREATE DEFINER=root@% FUNCTION f_getdistance(in_from_x decimal(10,3), in_from_y decimal(10,3),in_to_x decimal(10,3),in_to_y decimal(10,3)) RETURNS decimal(20,10)BEGINdeclare line LineString;#select CONCAT('LineString(',in_from_x,' ',in_from_y,'