Otisco Lake siteid=3585 · NY

Shape history

Scrub through every polygon observation to validate that the derived water outline matches the actual lake in the source scene. Most recent first. Base layer is the natural-color RGB from the same Sentinel-2 / Landsat granule that produced the polygon. The shape outline is overlaid in red. Partial-coverage scenes (LE07 SLC-off, heavy cloud) are excluded by design — they live in the Imagery tab.

Tip: a clean fit means the red polygon outline tracks the visible water/land boundary. Persistent over- or under-coverage on the same lake stretch indicates NDWI threshold or shoreline-buffer tuning needed for that lake. PC titiler is rate-limited — scrubbing too fast may briefly show empty tiles.