Complex sentence: These maps are just as accurate as traditionally-oriented maps, because the position of North at the top of maps is arbitrary; indeed there are many maps with non-standard orientation, such as Medieval maps, polar maps, and Dymaxion maps.
Split into simpler sentences: These maps are just as accurate as traditionally-oriented maps, because the position of North at the top of maps is arbitrary. Indeed there are many maps with non-standard orientation, such as Medieval maps, polar maps, and Dymaxion maps.