## Fig Rectangular Coordinate Dimensioning Without Dimension Lines

1.9.1 Rectangular Coordinate Dimensioning.

Where rectangular coordinate dimensioning is used to locate features, linear dimensions specify distances in coordinate directions from two or three mutually perpendicular planes. See Fig. 1-48. Coordinate dimensioning must clearly indicate which features of the part establish these planes. For methods to accomplish this, see Section 4.

1.9.2 Rectangular Coordinate Dimensioning Without Dimension Lines. Dimensions may be shown on extension lines without the use of dimension lines or arrowheads. The base lines are indicated as zero coordinates, or they may be labeled as X, Y, and Z. See Figs. 1-49 and 1-50.

1.9.3 Tabular Dimensioning. Tabular dimensioning is a type of rectangular coordinate dimensioning in which dimensions from mutually perpendicular planes are listed in a table on the drawing, rather than on the pictorial delineation. See Fig. 1-50. This method is used on drawings that require the location of a large number of similarly shaped features. Tables are prepared in any suitable manner that adequately locates the features.

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