| parent | DGGRSZone | The parent zone for which to return sub-zone centroids |
| crs | CRS | The CRS of the returned sub-zone centroids coordinates (0 for default CRS) |
| relativeDepth | int | The relative depth at which to return sub-zone centroids |
| Return Value | Array<Pointd> | An array of sub-zone centroids in the deterministic sub-zone order using coordinates expressed in the requested CRS |