[FEATURE REQUEST] State vector clustering options for large inversion domains

[djvaron]

Inversions for large domains (e.g., CONUS, Russia) would currently be very expensive, with very large state vectors.

Some possible options to shrink the state vector:

• Smart clustering of grid cells to user-specified number of state vector elements
• Gaussian mixture model (GMM) with radial basis functions

[msulprizio]

The IMI now includes a clustering option