Contractors working on a project to turn Indiana's last surviving all-stone canal lock into a park have compiled a three-dimensional image of the 19th century structure.
An engineering firm used a special laser scanning instrument Thursday to create the three-dimensional image of the lock to help in the park's construction.
The surveying device records more than 12,000 images to produce a three-dimensional image.
The Erie & Wabash Canal's Lock No. 47 was hand-cut from limestone in the 1830s. It will be the centerpiece of a new Vigo County park slated for construction in late 2009 or early 2010.
One side of the lock near the town of Riley is intact, but a second wall will require restoration.