RTK. Photogrammetry. Engineering Grade.
Governed precision mapping where every capture point is validated against geometric constraints, altitude compliance, and RTK fix quality. Accuracy is not claimed — it is proven by the audit trail. Every position logged. Every gap detected. Every deliverable traceable.
Engineering surveying requires centimeter-level accuracy. Consumer drones produce insufficient precision for civil engineering or cadastral work. Professional survey systems capture accurate data but lack structured audit trails. Manual QA is subjective — one technician's "acceptable overlap" is another's gap. The solution is deterministic geometric validation at every capture point, with provable accuracy and replay-verified coverage.
GPS-only positioning. No RTK. Inconsistent altitude. GSD varies with terrain. Not suitable for engineering-grade deliverables.
Accurate capture but no governance layer. QA is manual and subjective. No deterministic gap detection. No replay verification.
RTK-validated positioning. Deterministic grid compliance. Automated gap detection. Every capture point logged and verifiable.
SurveyLaw inherits all eight FlightLaw constraints and adds three domain-specific laws for grid geometry, ground sample distance, and positional accuracy. FlightLaw violations always take precedence.
Flight lines, spacing, and overlap ratios are computed from the AOI boundary and target GSD. The grid is deterministic — same AOI and parameters always produce the same flight plan. Deviations from the grid are detected and logged in real time.
Ground Sample Distance is a function of altitude, focal length, and sensor dimensions. GSDLaw validates that the aircraft altitude produces a GSD within the required tolerance for the selected accuracy tier. Captures outside tolerance are flagged.
RTK fix quality is validated at every capture point. Engineering tier requires RTK fix with horizontal accuracy within 2cm. If RTK degrades below threshold, captures are paused until fix quality recovers. No capture without valid positioning.
Every survey mission operates at a defined accuracy tier. The tier determines positioning requirements, acceptable horizontal accuracy, and target use cases. Tier compliance is validated at every capture point.
Every precision mapping mission follows a deterministic workflow from AOI definition through export. Accuracy is validated at every step, not checked after the fact.
Area of Interest defined on the map canvas. Boundary polygon drawn or imported. Coordinate reference system specified. The AOI is the contract boundary for the entire survey.
System computes a deterministic flight grid. Altitude calculated for target GSD. Flight lines generated with front overlap (80%) and side overlap (70%). Same AOI and parameters always produce the same grid.
RTK base station connection verified before mission start. Fix type confirmed. Horizontal accuracy validated against tier threshold. Mission cannot begin without positioning that meets the selected accuracy tier.
At each capture point: validate position against grid, verify GSD compliance, confirm RTK fix quality. Every capture is logged with position, altitude, GSD, fix type, and horizontal accuracy. Non-compliant captures are flagged.
Real-time coverage tracking on the mission canvas. Grid cells update as captures complete. Overlap percentages computed. The principal sees coverage build in real time.
Post-flight gap detection compares the capture record against the computed grid. Gaps classified by severity: Minor (overlap below target), Moderate (coverage hole), Critical (missing flight line). Re-fly recommended if critical gaps exist.
Survey Package generated: georeferenced images with EXIF data, positions CSV, grid KML, and QC report. Every deliverable traceable to the audit trail. Accuracy proven, not claimed.
The flight grid is computed from the AOI boundary, target GSD, and overlap requirements. Every capture point is validated against the grid in real time.
Interactive visualization of the survey grid over real terrain. AOI boundary, parallel flight lines, capture points, RTK base station position, and gap detection — all rendered on the actual operating environment.
Quality assurance is computed, not estimated. Gap detection, overlap analysis, and GSD compliance are validated against deterministic thresholds.
| Severity | Condition |
|---|---|
| Minor | Overlap below target threshold |
| Moderate | Coverage hole in grid cell |
| Critical | Missing flight line |
Every position validated. Every capture logged. Every gap detected. The audit trail proves accuracy — it does not claim it.