An Odd Seam in a Stitched Property Image Needs Source-View Review
A stitched aerial image can make a large area easier to navigate while introducing a different presentation from any single photograph. An apparent bend, doubled object or abrupt edge at a seam should prompt a review of the underlying views before being described as a physical property defect.
Identify the kind of record
Ask whether the image is a single exposure, a stitched mosaic or another processed output. USGS describes orthoimagery as imagery processed to address geometric distortions associated with camera tilt and terrain. Processing serves a purpose, but the resulting image is still a particular product with a basis and limitations. Do not assume every visible boundary represents a boundary on the ground.
Ask which source views support the feature
Mark the area of concern and request an appropriate comparison with the underlying or alternate views. Agisoft’s published guidance acknowledges that unwanted artifacts can occur in stitched imagery. The general point is to check the image product before diagnosing a site feature. The review should distinguish a possible processing artifact from a feature consistently visible in independent views.
Preserve the unresolved question
If the available record cannot settle the issue, label that area accordingly and ask what further evidence would be useful. Do not smooth, fill or repaint the feature merely to make the record look convincing, and do not call a revised mosaic proof that the physical property changed. A processed-image revision and a site condition change belong to different histories. Important dimensional or safety decisions still need the appropriate verified basis and qualified review.
Copyable worksheet
Use one row for each field. Mark unknown information clearly and retain the original records.
| Field | Your note |
|---|---|
| Image product and version | ____________________ |
| Location of apparent seam or artifact | ____________________ |
| Source views reviewed | ____________________ |
| Processing issue or physical feature still uncertain | ____________________ |
| Decision requiring further verification | ____________________ |
Worked example
Illustrative example: a fictional reviewer sees a doubled vehicle beside a roof edge in a stitched site image. The provider checks the relevant source views before the team interprets the edge. A presentation correction is labeled as such, without being described as a repair to the physical property.