New answers tagged database-theory
1
As far as I could understand, there are 3 entities here.
Map
Road
Road Segment
And the relationships between them are:
Map M:N Road
Road 1:N Road Segment
Map 1:N Road Segment
A map could have multiple roads and a road could in multiple maps. A road could have multiple segments, in each map it is a part of. And a road segment would be related to one map ...
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