An orthophoto is a precisely stitched aerial map built from many drone photos, corrected for distortion. Because it shares the same scale as the real terrain, it's used for tasks like area calculation and boundary verification.
How an orthophoto is made
Software automatically matches and corrects distortion across photos captured along a planned flight path with a set overlap ratio. Using ground control points (GCPs) alongside this process significantly improves positional accuracy.
Where 3D mapping is used
3D mapping processes images captured from multiple angles into a three-dimensional model of terrain or structures. It's widely used for earthwork volume calculation, monitoring structural changes, and disaster-site analysis. On a construction site, for example, comparing monthly 3D models lets teams visually verify that earthwork is progressing on schedule.
What accurate data actually requires
Both techniques require real expertise — flight planning, GCP placement, and post-processing software — to hit the accuracy industrial work demands. Simply flying a drone and taking photos isn't enough; you need a flight plan and processing approach matched to your actual goal.
