Weather Observation Station 20

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    SELECT ROUND(LAT_N,4) FROM (SELECT LAT_N, ROW_NUMBER() OVER(ORDER BY LAT_N ASC) AS Row_Number_Asc, ROW_NUMBER() OVER(ORDER BY LAT_N DESC) AS Row_Number_Desc FROM STATION) st WHERE st.Row_Number_Asc = st.Row_Number_Desc