Turnpoint location and line of sight may appear as "Bridge>Rd Bend", to signify that the photo is taken overhead the bridge [ the turnpoint ] in the direction of the bend in the road [ the photo target ], "from the bridge to the bend in the road".
For some site, runways may be indicated as sod or paved, and their length given in 100's of feet, e.g. s/13.
Please contact John Leibacher with any suggestions concerning this material.