Polygon Annotation services · 02 / 10
Polygon Annotation
Vertex-accurate outlines for irregular objects where a box wastes half its pixels.
Rooftops, crops, defects and garments rarely sit inside a rectangle. Our annotators trace polygons at a vertex density you define, with snapping rules for shared edges so adjacent shapes never overlap or leave gaps.
Typical use cases
- Building and land-use mapping
- Crop and field boundaries
- Fashion and product cut-outs
- Manufacturing defect outlines
Sample deliverable
What the output looks like.
Synthetic demonstration scene. No client data.
Variants
Simple polygons
Single closed shapes per instance with class attributes.
Multi-part & holes
Courtyards, occluded parts and donut shapes handled explicitly.
Shared-edge topology
Adjacent parcels share vertices: no slivers, no overlaps.
QA metric
Boundary F-score
≥ 0.90
At a 2px tolerance, checked by QA leads on sampled tasks.
Export formats
- COCO JSON
- GeoJSON
- Shapefile
- CVAT XML
- LabelMe JSON
How every project runs
- Scope call & sample review
- Written guideline & gold set
- Fixed-fee pilot with QA report
- Production in weekly batches
Next step
Scope your project with
an annotation lead.
A 30-minute call with the person who would run your project. We review a sample of your data, recommend an approach and send a fixed-price proposal within two business days.