There will still need to be some temporal pattern to the data for HTM to apply. It operates on a stream of data, predicting what will happen next and/or identifying anomalies in the stream.
To use HTM out of the box for this problem, you will probably want to input the data in some particular order (for example starting from the measurement with the smallest depth and progressing to the one with the largest depth for each location).
If you aren’t squeamish about experimenting with the core algorithms, you could try to replicate some of the TBT experiments. For example, creating a population of cells (grid cell modules, etc) which encode the depth, and modify the cells in the TM layer to grow distal connections with that other population of cells rather than with other cells in the same TM layer. Given that this is in the “Getting Started” section, that is probably not a great place to start until you are much more familiar with HTM.