Geoscience object schemas

Object schemas are the top-level data structures in the schema hierarchy. Each object composes reusable components, which are in turn built from primitive elements.

Points and surfaces

Fundamental spatial objects — point clouds, triangulated surfaces, and line geometries.

• Pointset — a set of points in space with attributes
• Triangle mesh — a triangulated surface with optional parts and edges
• Line segments — a collection of lines composed of straight segments

Grids and block models

Regular, tensor, and unstructured grid geometries for spatial discretisation and property modelling.

Regular grids

• Regular 2D grid — uniform-cell 2D grid
• Regular 3D grid — uniform-cell 3D grid
• Regular masked 3D grid — uniform-cell 3D grid with a cell mask

Tensor grids

• Tensor 2D grid — variable-cell-size 2D grid
• Tensor 3D grid — variable-cell-size 3D grid

Unstructured grids

• Unstructured grid — general unstructured grid
• Unstructured hex grid — hexahedral cells
• Unstructured quad grid — quadrilateral cells
• Unstructured tet grid — tetrahedral cells

Drilling and downhole data

Drillhole survey campaigns and the data collected along drillhole traces.

• Drilling campaign — planned and interim drillhole data
• Downhole collection — a collection of downhole locations
• Downhole intervals — interval data along drillholes

Geological modelling

Model surfaces, cross-sections, and design geometries used in geological interpretation.

• Geological model meshes — a collection of geological volumes and surfaces
• Geological sections — cross-sections composed of polygons and polylines
• Design geometry — 2D/3D design geometry

Structural geology

Orientation measurements at point locations — lineation and planar data for structural analysis.

• Lineations data pointset — structural lineation measurements
• Planar data pointset — structural planar measurements

Survey and geophysics

Geophysical survey data across multiple measurement types — potential fields, electromagnetic, and resistivity-IP.

• Gravity — subsurface density variations measured via gravitational acceleration
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  • 2.0.0
• Magnetics — subsurface magnetic susceptibility measured via geomagnetic field variations
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  • 2.0.0
• Radiometric — natural gamma-ray emissions from K, U, and Th isotopes
  • 1.2.0
  • 2.0.0
• Resistivity-IP — subsurface electrical resistivity and chargeability
• Frequency-domain electromagnetic — FDEM survey data (complex impedance at discrete frequencies)
• Time-domain electromagnetic — TDEM survey data (transient decay after current shutoff)
• Geophysical records 1D — 1D columnar inversion products

Geostatistics

Variogram models, experimental variograms, distribution functions, and ellipsoid definitions for spatial modelling and uncertainty quantification.

• Variogram — variogram model with nugget and structures
• Experimental variogram — spatial continuity statistics by direction and lag
• Non-parametric continuous cumulative distribution — empirical CDF
• Global ellipsoid — single anisotropy ellipsoid
• Local ellipsoids — spatially varying anisotropy ellipsoids