Annotated Annexation Map of the City of Grand Rapids, Kent County, Michigan.
The circle in the center as well as the asterisks on the edges indicate the boundary lines for the townships, Division/Taylor Avenues and Hall Street. The square marks the center of the house numbering system, Fulton Street at Division Ave.
See the Annexations map for the meaning of the colors and the City/township overlay map for better drawn section lines. Also see Land Intro for an explanation of sections of townships.
Sorry for the poorly drawn information but since my stroke neurological damage prevents a steady hand.
From Heading Geography and the City of Grand Rapids
From web site: MyCityofGrandRapids.info