Footage markers and measured positions

Tying an observation inside the line to a distance and, sometimes, a surface point.

A reading of "42 feet" means the equipment counted 42 feet of cable from wherever it started. It does not mean 42 feet from your house, from the street, or from the property line — unless someone has said so and said what they measured from.

What this page cannot establish

Measuring approximate defect position cannot establish a precise property coordinate
Measuring approximate defect position cannot establish which side of a responsibility boundary the position falls on
Measuring approximate defect position cannot establish the depth at that position

What it is for

To establish where along the line an observation sits, so that work, second opinions, and responsibility questions can refer to the same place.

When a professional may raise it

These are circumstances, not rules. No method is appropriate everywhere, and a professional declining to use one is not necessarily cutting a corner.

when a proposal is priced against a described condition at a location
when responsibility may depend on where the condition sits
when comparing two inspections of the same line

What to ask for afterwards

A method performed without a record produces very little you can carry into the next conversation.

the distance reading and the point it is measured from
a surface mark and photograph, where a locate was performed

Practical constraints

a camera distance reading and a surface measurement are different things
readings from different access points are not directly comparable

Questions worth asking

What point is this distance measured from?
Is this a camera reading or a surface measurement?
How would a second inspection measure to the same place?

What would change the answer

the distance reading and the point it is measured from
a surface mark and photograph, where a locate was performed

What to do next

A distance without a stated reference point cannot be compared to anything, including a second inspection.

Ask what the measurement is referenced from

If your situation is different

The position determines who pays: When responsibility is disputed

Locating
Turning a distance into a surface position is a separate exercise.