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GOOD
BAD
UNSURE
polygon window water class
Your name is attached to your labels so we can measure agreement between labellers. Affiliation and email are optional.
Take another look. If you are confident, keep your label and the earlier one will be flagged for review.
Yellow line: pool polygon. Cyan line: analysis window. Red fill: water found by the method.
If you are not sure, choose Unsure.
See vetted examples of every label in the Example Gallery.
If you are not sure, choose Unsure. A guessed label is worse than no label.
The yellow line is the mapped pool polygon, the cyan line is the analysis window, and the red fill is the water the automatic method found. Tap the big image to cycle: true colour with the water class, true colour, the band with the water class, the band alone. The polygon (yellow) and window (cyan) are drawn as thin dotted lines.
| Swipe right | Good: red covers the water and little else. Also good when the polygon is all land and nothing is detected. |
| Swipe left | Something is wrong: pick the reason from the sheet that slides up (over-detected, under-detected, bad detection, tidal-connected, bad polygon, unsure). Floating algae counts as water: if the red stops at a bright green algae mat inside a pool, that is a bad detection. |
| Swipe up | Unsure. |
| Pinch | Zoom the image; drag to pan while zoomed; double tap to reset. |
| Undo | Takes back your last label. |
| Skip | Puts the pool back at the end of your queue. |
| Reload | Re-fetches the images if one comes up blank. |
Once two different viewers agree on a pool it is retired. If your label differs from an earlier viewer's, you get a chance to look again. Your total is kept under your name. The gear opens the set chooser (pool sizes and states).