A land survey is a very accurate map and set of measurements tied to real‑world coordinates and legal descriptions.

Surveys are foundational to property rights, design, permitting, construction, and infrastructure operations. Because errors can be costly or dangerous, surveying is a highly regulated profession with strict requirements around accuracy, documentation, and licensure.

Land surveys support dozens of applications, including:

• Establishing and marking property boundaries and easements

• Creating legal records (plats, ALTA/NSPS surveys)

• Topographic mapping for planning and design

• As‑builts and verification of constructed features

• Volume calculations (stockpiles, earthwork)

• Corridor mapping (roads, rail, utilities, power lines)

Water drainage/runoff studies and environmental assessments

For centuries, surveys were performed entirely from the ground, which is time‑consuming and sometimes hazardous. Drones provide:

• Coverage: Map large or difficult areas efficiently (steep slopes, wetlands, highways).

• Safety: Reduce time near traffic, cliffs, or unstable surfaces.

• Speed & Cost: Capture more data in less field time, often lowering total project costs.

• Detail: Produce rich orthomosaics, point clouds, DSM/DTM surfaces, and 3D models to support design‑grade drafting.

Under the hood: Professional drone surveys combine precision GPS/GNSS (RTK/PPK/PPP), inertial sensors, cameras, and optionally lidar to enable accurate, repeatable results.

No. In most circumstances in the United States, creating a survey deliverable requires a licensed land surveyor (and, in some cases, a licensed professional engineer depending on the work type and state). Operating the drone typically requires an FAA Part 107 remote pilot certificate, but Part 107 alone does not authorize producing legal survey documents.

Becoming a licensed surveyor generally requires years of education, supervised experience, and exams. Always verify state requirements and ensure a licensed professional is responsible for the work product.

Yes, when performed correctly. Drone‑enabled surveys can meet or exceed traditional methods for many topographic and as‑built applications. The deciding factor is professionalism and process, not the aircraft. Boundary determination still relies on legal and physical evidence in addition to measurements; drones complement, not replace, that work.

At Aerotas, we partner with licensed surveyors nationwide to deliver survey‑grade data that stands up to professional QC and real‑world use.

A defensible drone survey follows a structured, documented workflow:

1. Scoping & Specifications – Define accuracy targets, deliverables, coordinate systems, vertical datum/geoid, and acceptance criteria.

2. Pre‑flight Planning – Airspace checks (e.g., LAANC/authorizations), site hazards, sun angle, weather, and flight parameters (GSD, overlap, altitude, speed).

3. Control Strategy – Establish ground control points (GCPs) and checkpoints with a calibrated GNSS/total station workflow. Decide on RTK/PPK/PPP strategy and base/CORS references.

4. Acquisition – Fly the mission to collect imagery and/or lidar with proper exposure, overlap, and consistent flight geometry.

5. Processing – Perform PPK/PPP GNSS processing; run photogrammetry or lidar boresight and strip‑alignment; generate point clouds, DSM/DTM, and orthomosaics.

6. Classification & Drafting – Classify ground/buildings/vegetation/utilities as needed; create breaklines, contours, TINs, and CAD linework to spec.

7. Quality Control & Reporting – Validate with independent checkpoints (horizontal/vertical RMSE), review residuals and metadata, and compile a QA/QC report with accuracy statements and processing details.

Sign/Seal (as applicable) – A licensed professional reviews and signs/seals deliverables in accordance with state rules and client requirements.

Not all drones are suitable. For survey‑quality results, you typically need:

• A drone with RTK/PPK‑capable GNSS.  Basic single-band GPS can be used in limited circumstances, but all modern survey capable drones should be using high quality dual-band GNSS sensors.  

• A high quality camera (for photogrammetry).  Cameras on entry level drones are not high enough quality to achieve survey-grade accuracy.  Cheaper cameras with linear rolling shutters also introduce significant error into the final map.  

• Optional but powerful: lidar for vegetated or complex sites.  Lidar drones are bigger, heavier, and more expensive, but can provide critical data for many sites that imagery alone cannot. 
  
  

Typical budgets : ~$6,000+ for capable photogrammetry platforms and ~$35,000+ for lidar equipped systems, with high‑end configurations exceeding $100,000. The right tool depends on terrain, vegetation, accuracy, and deliverable requirements.

A drone survey is produced under the responsible charge of a licensed professional, meeting defined accuracy standards, documentation, and legal responsibilities. A drone map is a visual product generated from aerial images.  They are useful for context and basic measurements, but are not a legal survey.

If a map does not clearly identify the licensed professional responsible, and does not include accuracy statements and QC documentation, treat it as a map, not a survey.

There is no single universal number. Survey‑grade means the accuracy is quantified, validated, and documented.

Typical survey-grade projects target an accuracy around 1 inch, or 0.1 feet (~3 cm) when designed and processed with good procedures and proper control. This is a common level of accuracy as this is roughly the best accuracy achievable with GPS alone.  More advanced surveys involving laser scanners can achieve accuracy down to a millimeter or less, but those are less common and require very specialized equipment and procedures. Some surveys covering extremely large areas may only target accuracy of around 1 foot (~0.3 m).  

What matters most is a transparent accuracy statement (e.g. RMSE) supported by independent checkpoints and a clear QA/QC report.

Yes. In the United States, airspace is regulated by the FAA, not individual property owners. FAA Part 107 and Part 108 allow commercial operations subject to safety rules (e.g., visual line of sight, altitude limits, operations over people, and airspace authorization where required).

That said, state and local laws govern privacy, trespass, and nuisance. Reputable survey firms coordinate with property owners, avoid collecting personally identifiable imagery, and follow best practices to be both legal and respectful.

Look for:

• Licensed professional clearly identified (land surveyor and/or professional engineer)

• A formal QA/QC report with methods, checkpoints, and accuracy results

• Clear coordinate reference (datum, projection) and vertical datum/geoid

• Deliverables that match the scope (e.g., CAD linework, contours, LAS/LAZ point clouds, orthomosaics)

• Transparent chain‑of‑custody and version control for files

Organizations such as ASPRS publish best practices for accuracy testing and reporting. Ask vendors how they comply.

Aerotas is the leading provider of data‑processing services for land surveyors and civil engineers across the United States. Since 2014, we’ve delivered:

• Advanced GNSS processing (RTK/PPK/PPP)

• Photogrammetry and lidar processing

• Point‑cloud classification and 3D modeling

• Linework drafting, contouring, breaklines, and CAD drafting

• Project‑specific QA/QC packages and accuracy reporting

Our clients use Aerotas deliverables for a broad range of applications, including civil design, transportation, utilities and energy infrastructure, commercial development, and construction, and more.