In the Atlantic Ocean, close to the west coast of Africa, near the country of Sao Tome and Principe.
There is no such city as longitude only measures east-west and there are currently two latitude measurements and no longitude measurements, so it is unable to find the place.
The degrees of longitude and latitude, to find a position
At 21 degrees 17 minutes north latitude and 180 degrees longitude, you would find the International Date Line in the Pacific Ocean. It serves as the dividing line between two consecutive calendar days.
The nearest major city is Brasilia, Brazil.
The prime meridian is a line of longitude, to find the location at 51.8 degrees north latitude, you would need to look for the specific country or city where this latitude intersects the prime meridian.
Latitude and longitude are used to find the degrees horizontally and vertically around the earth, pin-pointing a location.
The altitude of Polaris is roughly equal to your north latitude. Your longitude has no effect on it.At 35 degrees south latitude, the altituide of Polaris is negative 35 degrees. In other words,it's 35 degrees below the point on the horizon due north of you, and you can't see it.
you must give compass points to find your way
You find the lines of latitude and longitude and find the place that they intersect, which is your location.
Latitude and Longitude map
Latitude: N 25° 45' 42.048" / Longitude: W 80° 11' 30.444"
To find the distance between two lines of longitude at a specific latitude, you can use the formula: Distance = radius of Earth * |longitude difference| * cos(latitude). Given a radius of Earth ≈ 3,963 miles, the distance between 66 degrees west and 60 degrees west at 44 degrees north latitude would be approximately 371 miles.