<Li> In Southern California, from Highland to San Dimas, the baseline is marked by Baseline Road . </Li> <Li> In Michigan, the baseline for the Michigan Survey forms the boundary between the second and third tiers of counties and in many portions, discontinuous segments of road along the baseline are known as "Baseline Road ." 8 Mile Road in the Detroit area runs along the Michigan Baseline and was formerly known as "Baseline Road ." </Li> <Li> Baseline Road in Hillsboro, Oregon, generally follows the Willamette Baseline which intersects the Willamette Meridian at the Willamette Stone State Park . </Li> <P> In Canadian land surveying, a base line is one of the many principal east - west lines that correspond to four tiers of townships (two tiers north and two south). The base lines are about 24 miles (39 km) apart, with the first base line at the 49th parallel, the western Canada--US border . It is, therefore equivalent to the standard parallel in the US system . In Ontario, a baseline forms a straight line parallel a geographical feature (mostly a lake, especially Lake Ontario or Lake Erie) that serves as a reference line for surveying a grid of property lots . The result of this surveying is the concession road and sideline system in use today . </P>

The area running east and west between baselines is a