diff --git a/Weather_Observation_Station_18.sql b/Weather_Observation_Station_18.sql
new file mode 100644
index 0000000..9e84783
--- /dev/null
+++ b/Weather_Observation_Station_18.sql
@@ -0,0 +1 @@
+select round(max(LAT_N)-min(LAT_N)+max(LONG_W)-min(LONG_W), 4) from STATION;