Interactive Geophysical Modeling ASsistant

Interactive modeling and interpretation

IGMAS+ is an interactive, modeling system for the 3D interpretation of potential field data from gravity and magnetics. The software offers gravity components, full tensor gravity (FTG) gradients and can deal with all magnetic components.

Lightning-fast and intuitive

In exploration geophysics speed of calculations matters – get predictions faster

To speed up computation time, IGMAS+ externalizes the calculation to computers in heterogeneous clouds, allowing use of potentially idle resources of available local network infrastructures. Additionally, commercial cloud computing providers can be integrated. All data transfers to the cloud are encrypted.

Additional, IGMAS+ uses the amazing potential of heterogeneous platforms consisting of CPUs and GPUs through OpenCL™. Speedup of a factor of several hundreds can be achieved with modern graphics cards by only distribute the tasks to the GPU.

Hybrid Modeling

Build models with confidence and apply your own function for parameter distributions within a body.

IGMAS+ now automatically calculates a re-sampled voxel model from a given triangulated polyhedron topology. With this voxel model complex distribution of physical parameters like density and susceptibility inside the solid polyhedrons can be defined. This gives the possibility of modeling more realistic geologies.  Parallel calculation of all fields from the polyhedron and the voxel model give you highest flexibility.

  • easy link your seismic data with complex functions
  • combine your polyhedron model with your voxel model
  • perform interactive modeling for your voxel model
  • supports all gravity and magnetic field calculations


Integrated and Streamlined Workflow

The basic geometric element of the model is a triangulated surface, that separates two volumes of different physical parameters. Any triangulated surface can be built in three different ways:

  • through the import of surfaces points, structured or unstructured
  • through the import of externally triangulated surfaces
  • through the import of voxel models and extraction of complex surface structures from the voxel model
  • an internal triangulation can be used to build a 3D geometry between several vertical, parallel sections


Precise and fast

IGMAS+ uses triangulated polyhedrons to approximate areas of constant physical parameters and superimposed voxel models for arbitrary parameter distribution within the Earth’s crust and mantle. The algorithms enables the calculation of:

  • geoid undulation
  • gravity components
  • all gradients (Full Tensor Gravity)
  • combinations of gravity gradients (Invariants, HDT)
  • as well as induced magnetic field components
  • remanent magnetization and all magnetic gradients (full tensor magnetics)

in one program step.

Lithospheric Vertical Stress

Deep inside into your model

To get an better understanding of your triangulated or voxelized density structure of the model you can calculate different types of vertical stress like:

  • The lithospheric stress σzz in a constant depth
  • The lithospheric stress σzz on a triangulated reference surface
  • The normal component of the lithospheric stress on a triangulated reference surface
  • The gravitational potential energy GPE in a constant depth or on a triangulated reference surface

Think Global

See all your data in an global context

Seamless integration of the NASA WorldWind SDK into the IGMAS+ interactive modeling workflow will give you much more possibilities to interpret your data, like:

  • Integrate the interactive IGMAS+ modeling workflow inside a global perspective.
  • Display huge collection of high-resolution imagery and terrain from NASA servers, your own network or around the internet.
  • Visualize Terrabytes of high-resolution terrain and geographic information from any open-standard public or private sources.
  • Use different projections like Flat Globe and Round Globe.
  • Complex view-composing of different layers and data.
  • Choose from over 6000 projections to transform your data into the global context.

see more


interactive modeling and constraining

Use borehole gravity data to improve depth and geometry interpretation for your model. Contrain your model with derived density information, gravity measurements and more. The borehole stations are fully integrated into the IGMAS+ workflow, this means you can model your polyhedron- and voxel model interactive with the borehole stations.

Time Machine

go in time with your model and data

In interactive modeling you have many data which evolve over time, like model structure, physical properties, current gravity/magnetic response of the model. Also visualization of fields changes over time. With a time-line based project management it is now possible to go back in your modeling time.

Different Platforms

Our software runs on different software and hardware platforms.


Available on Windows, Linux and MacOS – 32/64-bit

See for yourself

Different Screenshots from different Projects


Extracted Salt body with superimposed voxel model (25mio. voxels)

The SEG Advanced Modeling Program (SEAM) was launched in March 2007 as a partnership between industry and SEG designed to advance geophysical science and technology through the construction of subsurface models and generation of synthetic data sets.

  • Start model for interactive inversion, described in:
  • “New insights from interactive gravity inversion of complex salt structures – the 3D SEAM model”[EAGE 2014]
  • Work was done in collaboration with Statoil and University of Kiel.
  • SEG Advanced Modeling Corporation

Götze et al

View on the subducted Nazca slab in south america

Fully integrated IGMAS+ Model into the Open Source virtual Globe Renderer – NASA World Wind, this
opens the possibilities to use Terrabytes of all available Data in combination with interactive Modeling.

Data Overlays from:

Desert Dead Sea Rift Transect

an interdisciplinary research project to study the Dead Sea Transform

  • Götze, Hans-Jürgen ; Meye, Uwe ; Choi, Sungchan ; Schmidt, Sabine
  • Towards a synoptic interpretation of the gravity field in the Dead Sea Rift Basin .Version: 2011.
  • Society of Exploration Geophysicists – SEG

Synthetic Salt

Hybrid modeling

The superpostion of an voxel model and triangulated surfaces gives the user the possibility to model very complex parameter distributions inside his model, fully interactive.

Short demonstration of 3D Editor which is also the fundamental element for the automatic geometry-voxel inversion