1. A method for creating a feature-based coordinate reference using at least a first, second, and third feature of an object, the method comprising: placing a first, second, and third feature location block on the first, second, and third feature of the object, respectively; placing a first, second, and third target on the object using the first, second, and third feature location block, respectively, wherein each feature location block is configured with a target placement feature for guiding placement of the respective target on the object; measuring locations of the first, second, and third target; and creating a coordinate reference based on the locations of the first, second, and third target.