google-earth-engine-11-authentication

name	google-earth-engine-11-authentication
description	Sub-skill of google-earth-engine: 1.1 Authentication (+2).
version	1.0.0
category	engineering/gis
type	reference
scripts_exempt	true

1.1 Authentication (+2)

1.1 Authentication

import ee

# First-time setup (opens browser OAuth flow):
# ee.Authenticate()

# Runtime authentication (service account or existing token):
ee.Initialize(project="your-gcp-project-id")

# Service account (CI / headless):
credentials = ee.ServiceAccountCredentials(
    email="[e-mail]",
    key_file="/path/to/key.json"
)
ee.Initialize(credentials=credentials, project="your-gcp-project-id")

1.2 Define Area of Interest (AOI)

import ee

# From bounding box (lon_min, lat_min, lon_max, lat_max)
aoi = ee.Geometry.Rectangle([-5.0, 54.0, 2.0, 60.0])  # North Sea

# From polygon coordinates [[lon, lat], ...]
aoi = ee.Geometry.Polygon([[
    [-2.0, 56.5], [1.5, 56.5], [1.5, 58.0], [-2.0, 58.0]
]])

# From GeoJSON FeatureCollection
aoi = ee.FeatureCollection(
    "projects/my-project/assets/pipeline_corridor"
)

1.3 Key Marine / Offshore Datasets

Dataset	EE ID	Description
GEBCO 2023 bathymetry	projects/sat-io/open-datasets/gebco/GEBCO_2023	Global 15-arc-sec depth
ETOPO1	NOAA/NGDC/ETOPO1	Global 1-arc-min elevation
Sentinel-2 SR	COPERNICUS/S2_SR_HARMONIZED	10 m optical, 5-day revisit
Landsat 8/9	LANDSAT/LC09/C02/T1_L2	30 m optical
ERA5 wind/wave	ECMWF/ERA5_LAND/HOURLY	Reanalysis hourly
NOAA GOES SST	NOAA/CDR/OISST/V2_1	Daily sea surface temp
ESA WorldCover	ESA/WorldCover/v200	10 m land cover

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