Look beyond the famous crop
Explore a Costa Rican survey exposure from the whole landscape to its small disc-like mark, with the photographic-copy history kept in view.
What to keep in mind
All three views derive from one exposure. The public drum scan was made from a contact copy; the two crops are not independent observations.
Locate the detail
Find the mark in the complete frame, then compare the detail. What landscape and film-border information disappears in the crop?
Test the processing
Which edges and textures remain visible in both versions, and which become convincing only after the levels adjustment? Describe them without assigning an object identity.
Name the missing measurement
Using the complete frame, identify a claim about size, height or shadow that would need more than a single view. What additional evidence would test it?