What must be indicated when measuring property lines in relation to buildings?

When measuring property lines in relation to buildings, indicating perpendicular ties from the property line to the buildings is essential because it provides precise measurements of how far the structures are set back from the property boundaries. This information is vital for ensuring compliance with zoning regulations, set-back requirements, and other legal limitations that govern property use.

Perpendicular ties help surveyors and planners understand the spatial relationship between the property lines and the buildings. This is critical in urban planning and development, as it influences various factors such as light and air access, privacy concerns, and overall property layout. Additionally, these measurements are often required for any new construction or modifications to existing buildings to ensure that they adhere to local codes and ordinances.

The other options, while relevant to property measurements and development, do not specifically address the importance of measuring from property lines in relation to buildings. Therefore, focusing on perpendicular ties is the most relevant and crucial aspect in this context.