In the rectangular survey system, what is an imaginary line of latitude used to identify townships?

In the rectangular survey system, the term that refers to an imaginary line of latitude used to identify townships is indeed the base line. Base lines run east to west and serve as reference points for measuring the north-south position of townships. Each base line is paired with a principal meridian, which runs north to south, creating a grid for land description.

Township lines, while part of the same system, refer specifically to the horizontal lines that divide townships into smaller sections, running parallel to the base line. These township lines can be thought of as subdivisions within the grid defined by the base lines and principal meridians.

Section lines relate to divisions within a township, further breaking down the areas defined by township and range. They run east to west and north to south within the township, leading to the formation of sections.

Understanding the function and placement of these lines is crucial in the rectangular survey system, as it helps in accurately describing and locating parcels of land. The base line is foundational to this grid system, making it essential for land surveyors and real estate professionals.