You're right for most maps.
However, each cartographer makes his/her own key, so it could vary from one map to another. Check the key of the map to find out for sure.
What does a star or dot in a circle usually mean on a map? I have my answer but again my Mom questions it? Here is my answer! A star in a dot means a capital of a country. A dot in a circle means a capital of a state.
2 answers
A star or star within a dot on a map means it's the location of a capital city or a state