Photogrammetric target and related method

A method for measuring the contour of a curvilinear surface, the method comprising:

• providing a structure having a curvilinear surface;
• affixing at least one multi-target photogrammetric target assembly to said curvilinear surface, wherein said at least one photogrammetric target assembly comprises a first photogrammetric target disposed at a terminal show surface of a first support pillar and a second photogrammetric target disposed at a terminal show surface of a second support pillar, wherein said first support pillar and said second support pillar are operatively connected in a predefined spatial relation such that said first photogrammetric target is disposed in predefined lateral spaced relation to said second photogrammetric target;
• and
• measuring the position of said first photogrammetric target and said second photogrammetric target.