On the left hand side of Slezer's image from National Library of Scotland images there is a windmill on Bishop's Hill. The image from the 17th century so guessing a start_date of 1600 and and destruction in the battle of Dunkeld in 1689.

The missing river area needed to be corrected

Put date on buildings

Fix the bridge dates

This was a bridge that did exist (built of wood) but was destroyed. Datee of cosntruction/destruction need modifying

Trace the

Proof of concept addition to see if OHM is a suitable platform for Dunkeld and Birnam history