has value type binary data compression type coordinate grid encoding This array stores indices or spans into some form of coordinate space model rather than the coordinates themselves, and that grid is stored externally from this data array. The objective being that these coordinates are more compact to store than the raw coordinates themselves. The value of this parameter is the grid identifier, if there are multiple to choose from. A separate coordinate spacing model parameter will signify what form of coordinate space model is used. MS:1003826 MS