weather-observation-station-18.sql

SELECT ROUND(ABS(a - c) + ABS(b - d), 4)
FROM (
    SELECT
        MIN(LAT_N) AS a, 
        MIN(LONG_W) AS b, 
        MAX(LAT_N) AS c, 
        MAX(LONG_W) AS d 
    FROM STATION
    AS station
)
AS result;