What the project needed
An active sand pit changes continuously. The operator needs to know, campaign by campaign, how the face is moving, how much material has left and whether extraction stays within the permitted limits. That turns the survey into a recurring service rather than a one off job.
The MapSurvey record of this job is brief, so this page keeps to what it states and explains the method in general terms.
How this kind of job is approached
Periodic quarry monitoring is normally done with drone photogrammetry on fixed control points: each flight yields a surface model comparable with the previous one, and the difference between them is the volume extracted or stockpiled in that interval. Keeping the same control points across all campaigns is what makes the comparison reliable.
What was delivered
The project record does not list the deliverables of each campaign; the 3D model published in the viewer is on record.
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3D model of the quarry
State of the pit on the flight date, viewable without travelling to site.
If you have a similar project in Spain
For recurring control ask from the start for a permanent control network, deliveries always in ETRS89 and the UTM zone of the site, the cloud as LAS or LAZ and a volume report per campaign naming the reference surface. To quote, we need the perimeter as KMZ and the monitoring frequency your extraction plan requires.