Examples

MRI:

density, with 3 spatial attributes, 3-D grid connectivity

CFD:

magnitude, with 3 spatial and 3 orientation attributes, 3-D grid connectivity (uniform or non-uniform)

Financial:

no geometry/structure, N possibly independent components, nominal and ordinal

CAD:

3 spatial attributes with edge/polygon connections, surface properties

Remote Sensing:

multiple channels, with 2 or 3 spatial attributes, grid connectivity

Census:

multiple fields of all types, spatial attributes (e.g. address), connectivity implied by similarities in fields