What happens before a useful map is delivered.

The workflow separates careful field collection from post-processing. Stable, visible control points are distributed around the project; raw GNSS observations and base data are logged; coordinates are corrected afterward; and the corrected control is then introduced to the photogrammetry project. Independent checkpoints remain important because control should be verified, not simply assumed.

Planning includes airspace and NOTAM review, permissions, weather, terrain, obstacles, access, takeoff and landing locations, emergency procedures, overlap, altitude, and expected ground sampling distance. Once on site, conditions are confirmed, hazards are reassessed, control is placed, and the capture plan is adjusted where reality differs from desktop planning.

A georeferenced orthomosaic provides visual context while terrain and surface products help show drainage, elevation change, access, and the relationship between features. The products can support preliminary planning and documentation, but interpretation and any regulated boundary decisions remain with the appropriate qualified professionals.