Hello Hans Zhang,
There is no sheet 2 with the lon/lat, so it's difficult to play with the Locations values as it is.
Could you please edit your message and workbook?
I've attached my Try, but it is wrong for now. Just saving my work so that I can continue once I receive the full data.
Lénaïc RIÉDINGER, Global Community Engineer Tableau
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Sample Data Locations.twbx 44.0 KB