Aerial imagery

The DJI Zenmuse L3 uses two 100-megapixel RGB mapping cameras, with a listed 100 MP photograph size of 12,288 by 8,192 pixels per camera. Megapixels describe image dimensions, not the ground detail or positional accuracy of a finished map. Flight altitude, image sharpness, overlap, terrain, and processing determine the detail available in the resulting orthomosaic.

Ground sampling distance, or GSD, is the amount of ground represented by one image pixel. For example, a 2 cm GSD means one pixel represents approximately 2 cm on the ground; this is an illustration, not a promised project resolution. Smaller GSD can reveal finer detail, but it does not guarantee positional accuracy. Flight planning should match the features you need to identify or measure.

A drone orthomosaic is a georeferenced map image assembled from overlapping aerial photographs. Processing aligns the images and corrects for effects such as camera perspective and terrain to create consistent site coverage. Orthomosaics can support planning, documentation, and GIS analysis. Their suitability for measurements depends on collection quality, positioning and control, processing, and verified accuracy.

Repeat drone imagery and orthomosaic maps can document construction progress, clearing, access routes, and other visible site changes. Comparing dates is most useful when coverage, resolution, and geographic alignment are consistent enough for the task. Lighting, shadows, weather, and seasonal vegetation can also produce visual differences, so not every difference represents a physical change.

Depending on the agreed scope, you may receive georeferenced orthomosaic imagery, finished maps, or comparisons between collection dates. Tell us whether you need to view, print, measure, or use the results in GIS software. We confirm the file formats, coverage, resolution targets, coordinate references, and delivery requirements before collection rather than assume one output suits every project.

No. High-resolution imagery shows fine detail, but sharp photographs can still contain positional errors. Accurate measurements depend on flight planning, positioning and control, image processing, and independent checks appropriate to the intended use. Ground sampling distance and camera megapixels should not be treated as accuracy guarantees. Measurement requirements should be established before the flight.