Topographic features are occasionally observed in the course of the legal field survey that may indicate potential problems on-site such as public manholes (indicating possible municipal easement); overhead wires (indicating a utility easement); edge of pavement (neighbour may be encroaching into your property) or public sidewalk is partially on your property. The surveyor has an obligation to show features that may affect the boundary or impact the rights of the owners.
Accurate location of topographic features are shown on survey to reveal their existence and disclose potential claims by others over the land.
Why is this important?
Reveals where others (municipality, utility company, neighbours) may have a claim over portions of your land.