← Paper / modern comparison

Assign historical rows.

Review the alignment. Choose the object. Name the correspondence.

Working review

The dots are estimates, not proof that houses moved. A low fitting error only describes your chosen anchors. Check surviving corners separately; keep rebuilt sites out of the fit.

Loading building objects…

Try a workflow
Historical referenceOrange terrace row north of Cambridge Street
123456
Modern objects · same map extent

1. Check alignment

Offsets adjust the paper placement, not modern building coordinates. They are hypotheses to inspect.

3 check picks · RMSE 2.6 m · maximum 4.2 m

Object selection is active.

All residuals

cambridge-gloucester · fit · 0.0 m

alderney-gloucester · fit · 0.0 m

cambridge-charlwood · fit · 0.0 m

alderney-charlwood · check · 1.3 m

winchester-gloucester · check · 1.1 m

st-georges-gloucester · check · 4.2 m

2. Define the correspondence

    One row can link to several objects. Add each target before recording the assignment.

    3. Inspect the objects

    0 assignments · 0 explicit objects. These do not alter the main map until the saved output is adopted.

    Rebuilt links and conflicting categories remain neutral in the preview. Heights use source estimates where available. Draft fills illustrate a proposed assignment; they are not confirmed damage.

    Select a historical row and add its corresponding objects. The saved list will appear here.

    What gets saved?

    data/pimlico-review.json contains the full alignment configuration, evidence, source fingerprints, stable assignment IDs and a GeoJSON FeatureCollection. Each section retains its parent component, historical row and review status. Rebuilt or unreviewed objects are not eligible for historical damage painting.

    Save works in local development. Download GeoJSON also works without writing to the project.