One version of what happened, and when
Scheduled flights from repeatable positions produce a dated visual record of the whole site. When a programme dispute arises, the question of what was standing on a given week stops being a matter of recollection.
The same captures produce earthwork and stockpile volumes for valuation, and a site model that contractors, engineers and financiers can all look at together.
How a monitoring contract runs
Baseline
Pre construction survey of the site and its boundaries.
Schedule
Weekly, fortnightly or milestone captures from fixed plans.
Measure
Volumes, areas and progress against the programme.
Share
Imagery and models delivered to the whole project team.
The argument you are not having yet
Every project keeps records. What most projects do not have is a record all parties accepted before there was anything to argue about, which is the only kind that settles a question later.
A scheduled aerial capture is exactly that. Flown from the same positions on the same interval, it produces a sequence nobody can dispute the framing of, because the framing was agreed at the baseline. When the delay claim arrives eight months in, the question stops being whose recollection is better and becomes what the site looked like on the fourteenth.
- Programme and delay. What had been built by a given date, shown rather than asserted.
- Valuation and interim payment. Earthwork and stockpile volumes measured from the same flight that produced the imagery.
- Variations and instructions. Site conditions on the day an instruction was issued, which is usually the fact in dispute.
- Handover and defects. A dated sequence showing what was covered up, and when, long after it is buried.
The record is equally useful when nothing goes wrong. A client who can see the site every fortnight without flying to it asks fewer anxious questions, and a head office that can watch three sites at once stops sending people to check.
Volumes without walking a live site
Measuring a stockpile or a cut on foot means a survey team inside an active working area, around plant that is still moving. It takes hours, it interrupts the work, and the figure it produces is a set of points with the shape between them assumed.
Flown, the same measurement takes a fraction of the time and nobody stands in front of a loader. Overlapping capture reconstructs the surface itself rather than sampling it, so the volume is computed from the whole shape. Ground control is placed and independent check points are held back to verify the result, which is what makes the accuracy something we state rather than something we claim.
Because each capture is flown to the same plan, volumes are directly comparable between visits. That turns a single figure into a rate: how much moved this month, and whether that matches what was certified.
What site managers ask first
Does the site have to stop while you fly?
No. Capture happens over a live site with work continuing. We agree exclusion around the take off point and any lift operations on the day, and that is the extent of the disruption.
How often should we fly?
Monthly suits most building projects, fortnightly suits earthworks where volumes move quickly, and milestone captures suit a slow programme. The interval matters less than keeping it constant, because a regular sequence is what makes the comparison meaningful.
Who can see the record?
Whoever you decide. Deliverables can go to the whole project team, or be held with the client and released as needed. Where several parties need the same view, sharing one record is cheaper than each commissioning their own.
Can you start part way through a project?
Yes. The first flight becomes the baseline and everything after it is comparable. You lose the record of what happened before, which is the argument for starting at ground breaking rather than at the first dispute.
What about a site in a built up area?
Common, and it is a permissions question rather than a flying one. Sites near roads, neighbours or controlled airspace are settled before the first visit, and that authorisation carries across the scheduled flights rather than being sought each time.
Ask what changed since the last flight
Watch the project from wherever you are. Ask what is on the roof right now, or whether the boundary wall has moved since last month, and get a direct answer rather than two surveys to compare.