When you’re moving material, pouring capital into sitework, or reconciling quarterly inventory, speed without defensibility is a liability. Drone photogrammetry and volumetrics give operations, marketing, and finance teams the same truth set: a georeferenced, measurable 3D record you can validate, repeat, and audit.
What it is—in business terms
- Drone photogrammetry: We fly structured image missions (nadir + oblique), then reconstruct those overlapping photos into a scaled 3D surface (point cloud, mesh, DSM/DTM) tied to a survey coordinate system.
- Volumetrics: Using that surface, we measure stockpiles and cut/fill against a defined base or prior survey—reporting quantities, deltas over time, and confidence metrics (RMSE, checkpoint errors).
Bottom line: you get quantities you can sign off on, timelines you can compare apples-to-apples, and visuals your stakeholders understand.
Why leaders adopt it now
- Speed: A 30–60 minute flight can cover an entire site. Processing pipelines return draft surfaces the same day; validated numbers follow quickly.
- Repeatability: Identical flight templates and control workflows produce consistent, comparable datasets month after month.
- Auditability: Control points, checkpoints, geoid/vertical model, and method selection are documented—so numbers survive procurement, compliance, and external reviews.
- Cross-functional value: Operations uses volumes and haul plans; Finance uses reconciliations; Safety uses 3D context; Marketing/Comms uses orthos, renders, and time-lapse for stakeholder updates.
Where it fits
- Quarries & bulk material yards: Inventory, cycle counts, vendor reconciliation.
- Construction & civil: Earthwork progress, as-built verification, subcontractor pay apps.
- Manufacturing & logistics: Aggregate bays, salt/sand piles, mulch, scrap, recyclables.
- Utilities & industrial: Berm health, containment volumes, spoil piles, laydown yards.





What “good” looks like (the measurement standard)
- Capture: 80/80 overlap for piles, nadir + low obliques to see toes and steep faces; consistent lighting; fast shutter to avoid blur.
- Control: RTK/PPK on the aircraft plus 3–6 well-surveyed GCPs and independent checkpoints (corners + center).
- Vertical truth: Correct geoid/vertical datum (e.g., NAVD88 with appropriate GEOID), method logged in the report.
- Method transparency: For each pile: polygon, base definition (TIN, best-fit plane, or reference surface), and any masking or smoothing.
- QA: GCP and checkpoint RMSE, reprojection error, image counts used, GSD, and coordinate system.
The deliverables decision-makers actually use
- Per-pile CSV: Name, material, base type, volume (yd³/m³), surface area, date/time, operator, RMSE.
- Cut/Fill summary: Positive/negative volumes and net, with colorized maps.
- Orthomosaic (GeoTIFF/PNG): True-to-scale plan view for presentations and internal updates.
- Point cloud (LAS/LAZ) & surfaces (TIN/GeoTIFF): For engineers and survey teams to ingest into Civil 3D, TBC, Carlson.
- Executive PDF: One-pager with site overview, key charts, and methodology notes suitable for audit packages.
Accuracy, stated plainly
- Horizontal: ~2–3 cm with RTK + quality GCPs; ~3–5 cm with GCPs only.
- Vertical: ~3–5 cm with RTK + GCPs; ~5–8 cm with GCPs only.
- Implication: For volumetrics, vertical accuracy dominates. Clean toe visibility and correct base selection reduce bias more than chasing ultra-fine GSD.



Workflow overview (so you know what you’re buying)
- Scoping: We align on tolerances, coordinate system, vertical model, base definitions, and reporting format.
- Flight plan: Altitude set to hit target GSD; grid + perimeter obliques for pile geometry; safety plan for live yards.
- Control: We set and survey GCPs/checkpoints tied to site benchmarks; verify RTK lock and metadata.
- Acquisition: Fast, repeatable missions with exposure control and motion mitigation; we can also fly indoors where GPS is unavailable using specialized drones and visual-inertial navigation.
- Processing: Photogrammetry (SfM/MVS), georeferencing, dense cloud → DSM/DTM; QC against checkpoints.
- Measurement: Digitize or auto-detect toes, choose base (TIN/best-fit/reference), compute volumes; run cut/fill if comparing to prior epoch.
- Reporting & handoff: Executive PDF, CSVs, GIS/CAD files, visuals for marketing/leadership; archive the chain of custody.
Risk controls & compliance
- Chain of custody: Operator, aircraft logs, firmware, capture settings, and processing versions retained.
- Method consistency: Identical pile IDs, polygons, and base rules across months to avoid “method-induced” variance.
- Safety: Part 107 procedures, hazard matrix, comms plan with yard managers; dust and moving equipment mitigation.
- Privacy & airspace: Site permissions, NOTAM checks, FRIA/FR restrictions, and when needed, waivers/authorizations.
How this helps Marketing & Communications
Your operations generate quantifiable progress; your stakeholders crave stories. The same dataset that finances use for reconciliation becomes visual evidence: before/after sliders, colorized cut/fill maps, annotated orthos, short motion graphics for board decks and social, and hero imagery for proposals. One acquisition, many deliverables.



Cost levers you control
- Cadence: Monthly/quarterly inventories reduce per-event costs via templated missions and known controls.
- Method: Standardizing base definitions eliminates rework and disputes.
- Scope: Focus flights on active bays or high-value piles to concentrate measurement effort where it pays.
Photogrammetry vs. LiDAR—when to switch
- Photogrammetry excels on exposed, granular materials (rock, gravel, salt) and paved surfaces, delivering high visual fidelity for communications.
- LiDAR is preferred when vegetation occludes the ground or when thin, vertical features must be captured. We advise per site based on accuracy targets and surface conditions.
A quick case pattern (representative)
- Context: Multi-pile aggregate yard requiring monthly inventory and quarterly audit.
- Approach: 100 m nadir + 35 m oblique ring; RTK with five GCPs and two checkpoints; NAVD88 (GEOID) vertical.
- Outcome: Executives received a one-page PDF and CSVs within 24 hours; Finance reconciled variances within ±2–3% against scale data; Ops adjusted haul plans the same day; Marketing repurposed orthos and 3D stills for the quarterly stakeholder update.
What to look for in a provider
- Verifiable RMSE on checkpoints, not just GCPs.
- Documented coordinate/vertical systems and geoid models.
- Transparent base and polygon methods (repeatable across cycles).
- Ability to fly indoors and in confined/complex sites.
- A post team that can output engineer-ready files and executive-ready visuals.
Ready-to-act checklist
- Define tolerance (e.g., ±3–5 cm vertical) and reporting cadence.
- Confirm coordinate system and vertical model you use internally.
- Identify piles/areas of record and required base method per category.
- Decide who signs off on QA (internal surveyor/engineer or external).
- Establish your deliverable set (CSV, PDF, CAD/GIS, marketing renders).








About St Louis Drones
St Louis Drones is a full-service professional commercial photography and video production company with the right equipment and creative crew experience for successful image acquisition. We offer full-service studio and location video and photography, as well as editing, post-production, and licensed drone pilots. St Louis Drones can customize your productions for diverse types of media requirements. Repurposing your photography and video branding to gain more traction is another specialty. We are well-versed in all file types and styles of media and accompanying software, and we use the latest in Artificial Intelligence across our media services. Our private studio lighting and visual setup is perfect for small productions and interview scenes, and our studio is large enough to incorporate props to round out your set. We support every aspect of your production—from setting up a private, custom interview studio to supplying professional sound and camera operators, as well as providing the right equipment—ensuring your next video production is seamless and successful. We can fly our specialized drones indoors. As a full-service video and photography production corporation, since 1982, St Louis Drones has worked with many businesses, marketing firms, and creative agencies in the St. Louis area for their marketing photography and video.
If you want this month’s inventory measured—or you’re ready to standardize a defensible, repeatable workflow—let’s set your spec and flight plan.




















































