CRS Conversion Formulas
--> -->EPSG 4326 to EPSG 3857(GOOGLE MAPS)
float lon = @P.x;
float lat = @P.z;
float x = lon*20037508.34/180;
float y = (log(tan((90+lat)*PI/360))/(PI/180))*(20037508.34/180);
@P.x = x;
@P.z = y;
float lon = @P.x;
float lat = @P.z;
float x = lon*20037508.34/180;
float y = (log(tan((90+lat)*PI/360))/(PI/180))*(20037508.34/180);
@P.x = x;
@P.z = y;