Check the Legend or Key if it has it.
a amp key should tell what the symbols on a map mean. What does a blackened dot usually represent
a city
a city
a capital
small to large town or a small city
Black dots on a map represent towns and cities. The bigger the dot, the bigger the city.
A city, (though not a major one as a major city is represented with a slightly larger dot.)
It usually represents a city.....or a small squashed fly.
On a map, a star usually marks the capital of the state, province, or country. A dot in a circle usually marks other major cities.
city
a circular dot on a map could mean a variety of things. Most likely the dot would indicate a city. Check the legend of your map to find out.
Black dot typically represents a city on a maps but different maps may represent other things so best to check the map legend.