# See what changed, from the same viewpoint.

Spatial Summit Group

https://spatialsummitgroup.com/comparing-site-visits-in-3d

Updated 2026-11-01. Access: invite-only.

See what changed at a site by viewing dated visits from the same camera. Comparing site visits in 3D means relating dated reconstructions through an accepted transform into a shared Site frame, so the same camera can inspect the site across dates.

![Two drone photos of one building, summer and autumn, aligned on the facade and wiped from one to the other, with the changes outlined: a box truck gone, different vehicles in the yard, new deck furniture and more pallet bins](https://spatialsummitgroup.com/landing/media/film-diff.webp)

Summer and autumn visits compared · Planned view.

[4,138 training views · 2026-09-16](https://spatialsummitgroup.com/methodology#measurements) — Warehouse dataset · 4,195 registered views; 57 reserved for evaluation.

## A shared camera needs a shared frame.

![Ground-level footage from a warehouse walk](https://spatialsummitgroup.com/landing/media/still-warehouse-aisle.webp)

Warehouse source walk · 360 footage reframed at ground level.

Each Visit keeps its date and source-frame identity. TRACE queues a measured alignment candidate against the Site reference after placement; a person reviews the candidate before it becomes canonical.

Once a visit is aligned, Compare opens it beside any other visit, from the same camera.

## Keep each work order at its spot and date.

For site documentation, an operator can pin a Ticket in an accepted Record and retain its Visit, clip time and linked Findings. Same-Visit checks prevent a pin and clip from silently referring to different dates.

For construction progress, film work before it is covered up, then compare a later visit from the same view to check what went in.

Automatic change detection, automatic alignment acceptance and agents verifying completed work are Planned.

## Questions, answered.

### Is every new Visit automatically aligned?

No. Measured candidates are queued against the Site reference, and a person reviews acceptance. Universal automatic acceptance is Planned.

### Can two unaligned Records be treated as a measured comparison?

No. Without an accepted relationship between their frames, a visual resemblance is not a verified spatial correspondence.

## Sources and access

[Methodology and dated measurements](https://spatialsummitgroup.com/methodology)

[Machine-readable capabilities](https://spatialsummitgroup.com/capabilities.json)

[Request access](https://spatialsummitgroup.com/#access).