Since you did not specify the directions of the latitude and longitude lines, the best assumption would be 15 degrees north latitude and 100 degrees east longitude. However, there is no capital city located there, and none at the other combinations. It is actually Chainat province in Thailand.
Whitehorse
Tripoli, capital city of Libya.
The largest community, Honolulu, is the state capital. The image is located at 21.5 degrees north latitude and 158 degrees west longitude.
Jakarta, Indonesia.
Brasilia, Brazil.
Muscat, Oman.
The closest capital is Rabat Morocco but its not that close
Kiev, Ukraine.
The closest capital cities are Tehran and Abu Dhabi.
The capital of Denmark is located at 55 degrees North Latitude and 12 degrees east Longitude. Copenhagen is the most populated city in Denmark
The city of Accra is the capital of the nation of Ghana. It is located at 5.550 degrees North and .2 degrees West. It is considered tropical.