[Ger-Poland-Volhynia] Small villages in Volynia

[Elmer Grenke]

I have a general type of question .

Both my parents were born in small villages in Volynika ,in the early 1900 ' s .  Looking at a period map of the time 
( Dr Stump  ? ) There appear to be numerous small villages . Judging by the scale  they appear to be about 3 - 5 Km apart . Was there some sort of centre , or nucleus to these villages . What we might call a general store , blacksmith shop , post office , village policeman , and so on . Or were they just signposts or mileposts 

Thanks 

Elmer Grenke