hi_mini_order

typedef enum {
    HI_MINI_ORDER_1 = 0,  // Non-compact type. No sampling is performed.
    HI_MINI_ORDER_16 = 1, // Compact type. 
    HI_MINI_ORDER_4 = 2, // Compact type. One point is sampled from every four points in the input table.
} hi_mini_order;