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select round( SQRT( POWER(MAX(LAT_N)-MIN(LAT_N),2) + POWER(MAX(LONG_W)-MIN(LONG_W),2) ) ,4) from STATION;
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Weather Observation Station 19
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select round( SQRT( POWER(MAX(LAT_N)-MIN(LAT_N),2) + POWER(MAX(LONG_W)-MIN(LONG_W),2) ) ,4) from STATION;