Coastal Waters Utilizing GIS & RS techniques

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" summary

Delineates High‑Water Mark coastlines and baselines anchored to exposed reefs at Lowest Astronomical Tide, then generates a 3 nautical mile coastal zone under UNCLOS articles 5–16. Workflow uses Google Earth Engine and Python to process Sentinel-2 multispectral and temporal imagery, plus the Digital Earth Pacific coastline and main grow detection tools. Bathymetry comes from satellite-derived methods and NASA ICESat-2 lidar via its data catalog API with refraction correction, validated against field GPS points and hydrographic charts.

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