Construction
A considerable amount of money is spent each year for construction.
There are many reasons to photograph construction sites. to include documentation for compliance to regulatory requirements,
document progress for funding management, asset and inventory management, inspection, and last but not least is to capture the spirit and history of the investment in photos to hang on the conference room wall. After all, most construction is the result of someone turning a dream into reality and photos of success stir emotion and motivate others to succeed.
Progression can't be captured in just one moment.
Progress photos by definition are repetitive. The frequency may vary from project to project. Large projects may appear to progress slower requiring less frequent documentation where smaller projects may appear to progress rapidly requiring more frequent documentation. The point is to capture change or rate of change.
Change by definition may be limited to a comparison of only two events, possibly a before and after set of photos to illustrate what something looked like in the beginning compared to completion.
Photographic documentation for progress may require multiple trips for frequent documentation during the project. Photos documenting change are useful for many applications and not limited to construction. Construction does present fertile opportunities for aerial photography due to the nature of the subject with expansive construction sites, tall structures and hard to access or unsafe access to areas by humans. Aerial photography also provides a unique perspective.
There is also power in a one-time set of photos for inspection or as an aid to facilitate a critical decision or just to document a special event.