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Aerial Triangulation
Block adjustment, camera calibration and residual reporting that downstream products can rely on.
Aerial Triangulation
Aerial triangulation is the foundation of every other photogrammetric product, and the one step where cutting corners is least visible. An adjustment that converges is not the same as an adjustment that is correct; systematic error can hide comfortably inside an acceptable-looking RMSE.
We run block adjustments with proper attention to tie point distribution and image connectivity, control point weighting and identification quality, self-calibration where the camera warrants it, and residual analysis that looks for spatial pattern rather than only at aggregate statistics. Blunders in control are detected and reported rather than absorbed by the adjustment.
The deliverable includes the exterior orientation, the calibration result and a full residual report by point and by image — enough for an independent reviewer to accept the adjustment on its merits rather than on trust.
What you receive
Every item below is issued in your own template, with your layer conventions, title block and revision scheme.
- Exterior orientation parameters for every image in the block
- Interior orientation and self-calibration results where applied
- Tie point measurement with connectivity and distribution analysis
- Ground control point identification and measurement report
- Bundle adjustment residuals by point, by image and spatially plotted
- Blunder detection report on control and tie observations
- Independent check point verification with RMSE by axis
- Adjusted block report suitable for client or authority acceptance
- Stereo model setup ready for downstream compilation
Production detail
| Typical turnaround | 1–3 weeks per block by image count |
|---|---|
| Block sizes | Tens to tens of thousands of frames |
| Imagery handled | Large-format digital, film scans, UAV, satellite stereo |
| Typical accuracy | Sub-pixel RMSE on tie points; control residuals within project tolerance |
| Calibration | Self-calibration with additional parameters where justified |
| Output formats | Adjustment report, EO / IO parameter files, project files for downstream use |
| Revisions | Readjusted until the specification is met |
Software and formats
We work in your toolchain. If something you use is not listed, ask — the list below is only what we use most.
Frequently asked
Send one aerial triangulation job and see how we work
Scope, price and programme come back in writing before anything starts. Most first projects are a single deliverable so you can judge us on output, not on a pitch.