Drone Photogrammetry: The Complete Guide
What drone photogrammetry is, what you can build with it, and how to turn drone photos into survey-grade orthomosaics, 3D models, point clouds and elevation models.
How to Fly an Accurate Drone Mapping Mission (RTK + GCPs)
The industry-standard flight routine for survey-grade drone mapping: overlap settings, GSD, grid patterns, RTK/PPK GPS (Trimble, DJI, Emlid), ground control points and checkpoint verification.
Coordinate Systems & Height Datums for Drone Surveying
A practical guide to coordinate reference systems and vertical/height datums for drone mapping — with reference tables of European and North American CRS (SWEREF99, ETRS89, OSGB, NAD83, State Plane) and height systems (RH2000, NN2000, NAP, NAVD88, EGM2008).
Ground Control Points & Accuracy: A Surveyor's Guide
How ground control points work, how many you need and where to place them, GCPs vs RTK/PPK, checkpoints, and how to read a horizontal/vertical RMSE accuracy report for survey-grade drone mapping.
Best Drone for Mapping: How to Choose (2026)
How to choose a drone for photogrammetry and surveying — camera and sensor, RTK vs standard GPS, multirotor vs fixed-wing vs VTOL, and which drones suit which jobs.
Drone Volume Measurement: Stockpiles & Cut/Fill
How to measure volumes from drone data — stockpiles, earthworks and cut/fill — including base-surface choice, accuracy, best practices, and how to do it in Orthosite.
Drone Mapping for Construction: Progress, Volumes & As-Builts
How construction teams use drone mapping — progress tracking, earthwork volumes, cut/fill against design, as-builts and stakeholder communication — and how to do it accurately.
Orthomosaic, DSM & DTM Explained
What an orthomosaic, DSM, DTM, point cloud and 3D mesh are, how they differ, which to use for which job, and the formats they come in.
Drone Mapping for Agriculture: Terrain, Drainage & Planning
How drone mapping helps agriculture — accurate orthomosaics, elevation models for drainage and land levelling, area and volume measurement, and field documentation.
How to Measure on Drone Maps: Distance, Area, Volume & Profiles
How to measure distance, area, volume, height differences and cross-section profiles on a drone map — accurately, in the right units and coordinate system.
Turn your next flight into a survey-grade result
Upload your drone photos and Orthosite builds the orthomosaic, 3D model, point cloud and elevation models in the cloud — measure, share and export in open formats.
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