| id: ship | |
| type: element | |
| name: Ship | |
| task_types: [polygon_extraction, instance_segmentation, oriented_polygon] | |
| preferred_heads: [validity, context, polygon, instance] | |
| label_formats: [polygon, coco, dota] | |
| positive_label: ship | |
| negative_policy: unlabeled_is_ignore | |
| typical_sensors: [PMS, PAN, SAR] | |
| typical_resolutions_m: [0.5, 1, 2, 3, 10] | |
| # Ship | |
| Ships are object targets and should not be forced into a pure semantic | |
| segmentation class. Use polygon or instance heads when annotations support it. | |
| ## Required Context | |
| - Ports, aquaculture grids, bridges, and bright wave wakes are hard negatives. | |
| - SAR and optical ship extraction should be sensor-aware. | |