Modern Machine Tool Controls 25 (2.16. In each case write the X and Y coordinates of the center of each hole for the hole pattern dimensioning given. a. Absolute X and Y coordinates. Refer to Figure 2.25 Datum Dimensioning 2 25 500 -1.00+ - 2.00 3.00- -400- FIGURE 2.25 Hole pattern for absolute XY coordinates. b. Incremental X and Y coordinates. Refer to Figure 2.26 Delta Dimensioning 3.00 1 0-0-0 -100 500 -1.00*+-100- -4.00 FIGURE 2.26 Hole pattern for incremental XY coordinates