| id: red_tide | |
| type: element | |
| name: Red tide / harmful algal bloom | |
| task_types: [semantic_segmentation, classification] | |
| preferred_heads: [validity, context, semantic_segmentation] | |
| label_formats: [mask, polygon, image_label] | |
| positive_label: red_tide | |
| negative_policy: unlabeled_is_ignore | |
| typical_sensors: [PMS, MUX, MSS, MSI, OLI] | |
| typical_resolutions_m: [10, 30] | |
| # Red Tide | |
| Red tide is often a broad water-color anomaly rather than a sharp object. It may | |
| need both local texture/color features and broader context. | |
| ## Required Context | |
| - Water background and turbid-water hard negatives are important. | |
| - Clouds, haze, sunglint, and sensor striping should be explicit context or ignored. | |
| - Do not assume external water/land masks. | |
| ## Recommended Output | |
| - Pixel-level red-tide probability for segmentation data. | |
| - Scene or patch-level likelihood when only weak labels are available. | |