01 / Locate
Bound the search
Metadata-assisted and image-only paths gather candidate reference views without inventing a publishable location.
Visual localization / camera reconstruction
Sightline finds where a photograph was made, reconstructs the camera that made it, and tests that pose against the city before it can be presented as evidence.
A fail-closed pipeline
01 / Locate
Metadata-assisted and image-only paths gather candidate reference views without inventing a publishable location.
02 / Solve
Matched pixels are lifted into metric city geometry before robust absolute pose and field-of-view refinement.
03 / Verify
Every candidate is returned to the 3D scene and measured. Rejected evidence remains visibly rejected.