Surveying, Celerimetry & Cadastral Geometry
Total station observations, polar-to-cartesian reductions, Pregeo DAT parser, and trigonometric fiducial networks.
Total Station Celerimetry & Reductions
Rigorous trigonometric transformation from raw instrumental observations to 3D metric coordinates.
Instrument Station Setup
Computation of station spatial coordinates with instrument height (hs), collimation zeroing, and horizontal circle orientation.
Geometric Distance & Elevation Reduction
Spherical correction for earth curvature and atmospheric refraction applied to zenith angles and slope distances.
D_horiz = D_slope * sin(zenith); Delta_Z = D_slope * cos(zenith) + hs - hp + corr_earth Rigorous 3D metric reduction accounting for instrument height (hs), reflector prism height (hp), and geodetic curvature correction.
Italian Cadastral Pregeo DAT Specification
Deterministic parser architecture for Italian Land Agency survey field books.
Row 1 // Station Record
Instrument station coordinates, instrument height, identifier code, and orientation target point.
Row 2 // Observation Vector
Target collimation point, horizontal azimuth angle, zenith angle, slope distance, and prism height.
Row 7 // Outline & Parcel Contours
Topological connection vectors defining boundary outlines, parcel division lines, and cadastral lot identifiers.
Row 8 // Fiducial Points (TAF)
Official trigonometric coordinates of national fiducial reference points (Punti Fiduciali) used for baseline tying.
Trigonometric Fiducial Networks (TAF)
Cadastral triangular network closure and mutual distance validation.
Fiducial Triangle Closure
Analytical verification of mutual baseline distances between fiducial points against official Land Agency tolerances.
Modello 51 Cadastral Output
Automated drafting of official parcel subdivision area balances and cadastral update documentation.
Trigonometric Accuracy vs Statutory Cadastral Acceptance
Celerimetric reductions and Pregeo DAT parsing verify analytical and geometric consistency. They do not substitute official regulatory validation or guarantee automated administrative registration by the Land Registry.
Pregeo is a procedure of the Italian Agenzia delle Entrate. QismaCAD's parser architecture is designed independently for interoperability and does not replace official cadastral submission protocols.