Chapter 1 Geometric Dimensioning and Tolerancing Essentials 17 Copyright Goodheart-Willcox Co., Inc. 15±0.25 From the vertical surface to the center of the hole 15±0.25 Origin here at this angle from a reference line or plane? 0.5 Tolerance 15±0.25 0.5 Tolerance 15±0.25 Dimension origin symbol 15±0.25 Surface form Origin here from a point on the surface? Origin here from a point on the surface? Origin here at this angle from a reference line or plane? Feature in the Orthographic View Various Options for Establishing the Origin Goodheart-Willcox Publisher Example 1-12. Coordinate tolerancing does not provide a standard system for establishing the origin of dimensions. Taking measurements from different points on the same feature to locate the hole produces different results depending on the measurement technique.