Temporary livestock gather site near Pioche, Nevada

Capture

A twenty-minute window between 11:36 and 11:56 local, flown with a DJI Phantom 4 Pro (FC6310, 1-inch 20 MP RGB, 8.8 mm) on firmware v01.07.1641, in clear winter conditions.

951 images were captured and 489 went into the processing project, all 489 calibrated. The flight was a grid at 45.7 m above takeoff – 45.4 to 45.9 m across every frame – with the camera pitched 70° down, so the whole set is oblique with no nadir frames, at ISO 400 and 1/800–1/1600 s. Image spacing in the processing log (9.0 m along track, 5.1 m between lines, over a 65.7 × 43.8 m footprint) works out to roughly 79% forward and 92% side overlap.

Georeferencing came from the on-board geotags alone, WGS 84 / UTM zone 11N (EPSG:32611), with no ground control. Conditions were daylight VFR with low wind and good visibility.

Deliverables

The delivered set comprised the DSM, the bare-earth DTM – the only DTM in the archive – the contour PDF, the densified point cloud, the textured mesh, the 3D PDF and the quality report. The orthomosaic was produced but does not appear on the delivered list.

In full: an orthomosaic GeoTIFF, 4-band RGBA at 1.2 cm/px, 25,703 × 20,773 px and 954 MB with 31 tiles; a float32 DSM at 1.2 cm/px (480 MB) and a 6 cm downsampled DSM (85 MB); a bare-earth DTM with mask tiles; a contour PDF at 10 m interval; a densified point cloud in LAS, LAZ, PLY and XYZ; a textured mesh in OBJ and FBX with a 3D PDF; and an 8-page Pix4D quality report at 1.20 cm GSD over 7.03 ha / 17.4 acres.

Cadence

One-off mapping flight inside a recurring documentation relationship (the same operator's gathers were filmed at seven sites).

Method boundary

RGB photogrammetry georeferenced from the aircraft's geotags. The orthomosaic, DSM and DTM are internally consistent and suitable for a scaled site record, pen-layout planning, distances between features, and before/after comparison. Heights and absolute positions are not tied to ground control and the elevation models are not suitable for drainage design, earthwork quantities, or anything that carries professional responsibility. That work is routed through a licensed Professional Land Surveyor.