Farm property orthomosaic and 3D model near Delta, Colorado

Capture

A 22-minute window between 10:15 and 10:37 local, flown with a DJI Phantom 4 Pro (FC6310, 1-inch 20 MP RGB, 8.8 mm) on firmware v01.07.1641.

The mapping set was 51 images at a median 117 m above takeoff, 43 of them nadir, at 5472 × 3648 and 4096 × 2160. Image spacing in the processing log – 19.7 m along track, 44.8 m between lines, over a 211 × 141 m footprint – works out to roughly 86% forward and 79% side overlap. A second, photographic set added 66 oblique stills between 24 and 117 m and 24 raw 4K clips.

Georeferencing came from the on-board geotags alone, WGS 84 / UTM zone 13N, with no ground control. Conditions were daylight VFR with low wind and good visibility.

Deliverables

The orthomosaic is a 4-band RGBA GeoTIFF at 3.86 cm/px, 8,669 × 10,767 px and 142 MB, in EPSG:32613, with the georeferencing embedded in the TIFF instead of in a sidecar. A float32 DSM at the same resolution (63 MB) and a textured 3D mesh (OBJ + MTL + JPG texture, about 365 MB) were produced alongside it.

Delivered with 47 edited stills and 10 video clips (MP4, 4096 × 2160, 29.97 fps, 21 s to 3 min 20 s), and a 10-page Pix4D quality report: 51 of 51 images calibrated, 3.86 cm GSD, 10.2 ha / 25.2 acres.

Cadence

One-off.

Method boundary

RGB photogrammetry georeferenced from the aircraft's geotags, no ground control. The orthomosaic and mesh are consistent within themselves and suitable for property overviews, marketing, planning sketches, relative measurements and visual records. They are not suitable for boundary determination, acreage certification, engineering design, or any product that carries professional responsibility; that work is routed through a licensed Professional Land Surveyor.