Fan Chart
This Fan Chart portrays President John Quincy Adams' pedigree in the form of an open fan, or half circle. In contrast to the other relationship charts, which have rectangular boxes spanning birth and death dates, the Fan chart has curved boxes linked by generation.
The time line then begins in the center, spanning 'backward' to the birth of his oldest ancestors. A mark is placed in the middle of the time line as a reference point for users.
