1. A method for determining a shape of a substantially cylindrical specular reflective surface comprising the steps of: (I) obtaining calibration data; (II) obtaining target data about a target structure; (III) defining a target line from the target data, wherein the target line represents a feature of the target structure; (IV) capturing a reflected image of the target structure in the specular reflective surface; (V) obtaining reflected data from the reflected image; (VI) defining a reflected line from the reflected data, wherein the reflected line represents a reflection of the feature of the target structure; (VII) determining a correspondence between the target line and the reflected line; and (VIII) using the correspondence and the calibration data to determine the shape of the specular reflective surface.