Show location name instead of coordinates in Coordinate Map


I have a CSV file of raw sensor data with State, City, Lat, Long and other fields. I am creating a Coordinate map in Kibana. The marked location in the map currently shows the latitude and longitude information.

How can I get the city name instead of latitude, longitude shown in the map?
Why am I not seeing yellow circles for the locations where there is only 1 record?

Attaching an image:

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