And here’s the same thing as plpgsql function for Postgres: CREATE OR REPLACE FUNCTION lldistance( a point, b point) RETURNS FLOAT AS $$ DECLARE    x FLOAT;         dlat FLOAT;         dlon FLOAT; BEGIN    dlat = radians(a[0]-b[0]);    dlon = radians(a[1]-b[1]);    x := sin(dlat/2)^2 +     … Continue reading Calculate the distance between two GPS-Coordinates (ctd.)