This is a text description of geosegoper.gif. It illustrates measure assignment in geometric segment operations: splitting (part a), clipping (part b), and concatenation (part c). For splitting and clipping, the resulting measures reflect their values in the original segment; however, for concatenation, the measures for the second segment in the concatenation are shifted by 20 so that they continue after the end measure (50) of the first segment. End of description.