Support SEGY files that do not have geometry - consistent support of segy files

[MJZawacki]

The current code uses segyio.tools.cube() to extract a volume of data from segy files that can easily be chuncked up. However, most segy files do not have geometry in them that allows segyio to infer the dimensions of the volume. In the case where geometry is not present. You need to manually infer the dimensions by reading through the trace headers and constructing a volume manually.

[maxkazmsft]

The current code uses segyio.tools.cube() to extract a volume of data from segy files that can easily be chuncked up. However, most segy files do not have geometry in them that allows segyio to infer the dimensions of the volume. In the case where geometry is not present. You need to manually infer the dimensions by reading through the trace headers and constructing a volume manually.

Thanks! Could you please provide a reference to where you see this in our code?