Hi, My first suggestion is that you import the data as structured grid. Make sure that you also include a 2d/3d vector that describes the coordinate of each point. Then you can in your OpenDX net replace the positions component with your true coordinates while still retaining the computed connections component from your import as structured data.
Alternatively you can use the warped regular grid import of the general array importer. This one has regular connections, but positions specified for each data point in the data file. /Nils