Weather Observation Station 19

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    /*
     d(p,q) = sqrt((p1 - q1) ^ 2 + (p2 - 2) ^ 2)
    */
    SELECT
        ROUND(SQRT(POWER((MIN(lat_n) - MAX(lat_n)), 2) + 
        POWER((MIN(long_w) - MAX(long_w)), 2)), 4)
    FROM station;