Ōreti estuary | Sentinel-2

10 April 2025, 22:37 UTC · 10 m source bands · AOI only
Map previews reprojected to WGS84; statistics retain native pixels

Loading georeferenced overlays…

Explore spectral ratio maps

Map overlay Overlay opacity: 83%

Colour limits: 2nd–98th percentiles of preview pixels. Outside range clipped for visualisation.

Ratio comparisons

Linear and natural-log ratios; all values dimensionless. Log ratios are computed from scaled reflectance, not raw integer DN.

Layer	P2	P98
Red / Blue	0.311	1.717
Blue / Green	0.567	0.890
Red / Green	0.261	1.086
Blue / Red	0.582	3.214
Green / Blue	1.123	1.765
Green / Red	0.921	3.834
ln(B04) / ln(B02)	0.849	1.361
ln(B02) / ln(B03)	1.037	1.186
ln(B04) / ln(B03)	0.973	1.440
ln(B02) / ln(B04)	0.735	1.177
ln(B03) / ln(B02)	0.843	0.964
ln(B03) / ln(B04)	0.694	1.027
Blue (B02)	0.017	0.047
Green (B03)	0.026	0.063
Red (B04)	0.012	0.058

Not bathymetry. Ratios remain uncalibrated. Exposed intertidal flats, suspended sediment, substratum and uncertain L2A reflectance offsets can dominate the apparent signal.

OpenTopoMap requires an internet connection and observes community tile usage limits. Background tiles are not bundled. Georeferenced overlays are embedded in this HTML.