Drone Surveying — Basics for Businesses

Drone surveying has moved from a niche specialism to a standard tool in just a few years. Company premises, industrial estates, solar farms, quarries and construction sites can now be captured at a scale that classical land surveying could never deliver economically. Here's what you should know before commissioning a provider — technically, legally and commercially.

What a drone survey actually is

At its core, a drone flies a defined area along a pre-programmed grid and shoots overlapping photos from multiple angles. Photogrammetry software (in our pipeline: WebODM) then reconstructs the three-dimensional geometry of the site from those images. Outputs: orthophoto, digital terrain model, 3D mesh, point cloud.

Modern survey drones are equipped with an RTK receiver (Real-Time Kinematic GPS) that fixes the drone's position to centimetre accuracy in flight. That means the resulting model is geo-referenced directly, without the painstaking work of surveying ground control points.

What accuracy is achievable

In practice we land at ±2 cm per 10 m on RTK-based flights with well-prepared ground control points. That is the same order of magnitude as a Matterport Pro3 indoor scan on foot — no coincidence, but the honest physical ceiling of both methods.

For most applications that is more than enough. Anyone who needs more (official cadastral survey, for example) cannot avoid classical geodetic surveying — the drone then complements it, but does not replace it.

The output formats you receive

A standard drone flight produces the following data products:

• Orthophoto (GeoTIFF) — a true-to-scale, geo-referenced aerial map. Like Google Maps, but at your own resolution (typically 2–5 cm per pixel).
• DTM (Digital Terrain Model) — an elevation model with vegetation and structures stripped out. For flood simulation, slope analysis and earthworks volume calculations.
• DSM (Digital Surface Model) — an elevation model including trees and buildings. For visualisation and volume calculations of stockpiles or built structures.
• 3D mesh (OBJ / glTF) — a textured 3D model of the entire site. For presentations, web viewers and VR.
• Point cloud (LAS / LAZ) — the computed 3D points as an editable dataset for CAD software.
• Contour lines (DXF / SHP) — classical isolines for CAD and GIS pipelines.

Legal: permitting, insurance, privacy

Drone flights in the DACH region are tightly regulated. None of this is something you need to handle yourself as the client — we take care of it — but you should know the lay of the land:

• EU Drone Regulation: harmonised since 2021. Classification OPEN / SPECIFIC / CERTIFIED. Survey flights typically run in OPEN A2/A3 or SPECIFIC.
• Registration with the LBA / BAZL: mandatory for any commercial drone operation.
• Insurance: compulsory liability cover of at least €1 million — standard with any reputable provider.
• Restricted zones: nature reserves, controlled airspace and no-fly zones require additional clearance — allow a 2–4 week lead time.
• GDPR: people captured in the imagery must either be notified in advance or anonymised in post.

Commercials: when does a drone survey pay off?

Our rule of thumb from real-world projects:

• Area below ~1 hectare → classical surveying or Matterport outdoor capture can be competitive.
• Area 1–50 hectares → a drone is almost always the more economical choice.
• Area above 50 hectares → a drone is effectively the only option, possibly spread across multiple flight days.

Our Aerial/Site packages start at €1,290. That includes permitting, the flight itself, WebODM processing and handover of the full data package.

What to clarify before your first enquiry

1. What will the data be used for — construction progress documentation, surveying, marketing, permitting?
2. Which output format do your downstream tools (CAD, GIS, BIM) require?
3. When is the ideal flight window (vegetation cover, snow, construction phase)?
4. Are there any constraints on site (protected area, airport, industrial facility with a security perimeter)?

Conclusion

In 2026, drone surveying is a proven, cost-effective method delivering an honest ±2 cm per 10 m of accuracy and a rich output package (orthophoto, DTM, DSM, mesh, point cloud, contour lines) via WebODM. For medium- to large-sized outdoor areas it is essentially unbeatable. For high-precision cadastral work, classical geodesy is still required — but as a complement, not a replacement.

Got a specific project in mind? Request a consultation. We'll check permitting and flyability up front, free of charge.