Drones have revolutionised surveying and mapping industries, offering unparalleled efficiency and precision. To navigate this transformative landscape, it’s crucial to grasp the key definitions and terminology associated with drone mapping.

Let’s delve into the essentials:

Aerial Imaging vs. Drone Mapping

Aerial imaging captures visual data from above, while drone mapping involves the collection of geospatial information for creating accurate 2D maps or 3D models. The distinction is crucial in harnessing the potential benefits of drone technology.

Orthomosaic Maps

An orthomosaic map is a high-resolution, geometrically corrected image made by stitching together multiple drone-captured images. This high-resolution, georeferenced map eliminates distortions, providing an accurate representation of the surveyed area.

Point Clouds

Drone surveys generate point clouds – a dense collection of data points in 3D space. Architects, surveyors, and other property professionals can use point clouds to create detailed 3D models of structures, aiding in design, analysis, and visualisation.

Digital Surface Models (DSMs) & Digital Terrain Models (DTMs)

DSMs represent the Earth’s surface with all features, including buildings and vegetation, while DTMs exclude above-ground features, offering a bare-earth representation. Understanding these models is crucial for accurate elevation and volume calculations.

GCPs: Ground Control Points

GCPs are strategically placed markers on the ground with known coordinates. Incorporating GCPs in drone surveys enhances accuracy by correcting distortions and ensuring precise georeferencing of the collected data.

RTK: Real-Time Kinematic

RTK is a technology that enhances the accuracy of drone positioning by using real-time satellite corrections. This ensures centimetre-level accuracy in mapping and surveying applications, especially in areas with challenging environmental conditions.

LIDAR: Light Detection and Ranging

LIDAR is a remote sensing technology that uses laser light to measure distances and create highly detailed, accurate 3D models of the surveyed area. Drones equipped with LIDAR sensors can capture detailed information, making them valuable tools for various professional activities.

GNSS: Global Navigation Satellite System

GNSS includes satellite navigation systems like GPS, GLONASS, and Galileo. Drones equipped with GNSS technology ensure precise positioning and navigation, contributing to the overall accuracy of surveying data. 

NDVI: Insight into Vegetation Health

Normalised Difference Vegetation Index (NDVI), derived from drone-captured images, reveals the health and vitality of vegetation by measuring the absorption and reflection of light. It’s a powerful tool for landscape architects and environmental consultants.

Survey Grade vs. Mapping Grade Accuracy

Understanding the concept of accuracy grades is paramount. Survey grade accuracy is geared towards highly precise measurements required for land surveys, while mapping grade accuracy is suitable for broader applications like construction site monitoring.

Conclusion

At Survey Air, we offer a specialist drone mapping services tailored for the UK built environment, including but not limited to, 3D modelling, orthomosaic maps and volumetrics.

If you are interested in using drone mapping for your next survey or project, please contact our expert drone team today to request a free quote and consultation.