Blue = water. Default is a 12-month median of every clear Sentinel-2 pass — the current mean shoreline. Slide left to step back through individual dated passes.
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—ft/yr long-term
—ft setback
—yr horizon
Blue overlay = today's satellite waterline. Rate & setback are the USGS long-term record for this parcel.
Ocean shore eroding
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long-term, USGS DSAS · Gulf of Maine
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Eroding shore
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Fastest erosion
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Fastest gain
Long-term rate · m/yr (USGS DSAS)
−5 · erosion0 · held+20 · accretion
Rocky headlands — most of Maine's coast is not in the USGS sandy-shoreline record
Sea surface temp · JPL MUR · —
cooler°warmer
Colored line = USGS DSAS long-term shoreline-change rate (New England, OFR 2010-1118, Hapke et al.), m/yr — sandy-shore transects only. Maine's rock coast barely erodes; the hazard is sea-level rise in the fast-warming Gulf of Maine, not shoreline retreat. Screening, not a survey.