[Paraview] Geophysical XYZ data - which format is best?

[S. N. Warren]

Good day.

I just got myself a copy of ParaView for the purpose of plotting geophysical 
data exported from the commercial software RES3DINV. Here is the format 
(.xyz):

/Name of survey line is Conversion of RES2DINV data files
/Number of blocks is 384
/Results for iteration 7
/The x, y and z coordinates the centres of the model blocks, and
/the resistivity, conductivity and IP value of each block is given below.
/The I.P. is given in terms of Chargeability with units in mV/V
/       X            Y        Elevation  Resistivity  Conductivity       
I.P.    Sensitivity
     137.439      649.996       99.450    80306.586     0.00001245        
21.018  7.4934e-001
     162.377      649.998      100.875    15099.280     0.00006623         
9.732  1.9640e+000
     187.142      649.996       98.675    68860.805     0.00001452         
7.808  5.4303e-001
     211.869      649.997       95.275    46299.848     0.00002160         
6.606  1.4108e+000

The output that I am looking for is a couple of 3D plots (the conductivity 
plotted at the x,y,z locations and the resistivity plotted at the x,y,z 
locations). The "ground" surface (in the x-y plane) will be irregular as it 
represents the topography. I would like to be able to contour the data 
cubes.

My question is: What is the most appropriate data format to use for data 
like this? I figure probably VTK format or PLOT3D format. The PLOT3D format 
looks a little bit more complicated than what I need - probably would be 
counter-productive to convert my data to that... But, honestly, I'm totally 
unsure. Has anyone else worked with a simple xyz data set like this? What 
should I use?

Any advice would help so much!

Thanks,

Steve

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