Quick start — Sentinel-2 NDVI (Process API)¶

The headline workflow: send the bundled sentinel-2-l2a-ndvi evalscript over a tiny bbox + short window to the Process API; the server renders the NDVI and earthlens writes the GeoTIFF. Runs for real when SENTINELHUB_CLIENT_ID / SENTINELHUB_CLIENT_SECRET are set.

Credentials guard¶

In [ ]:

import os
from pathlib import Path


def has_sh_credentials() -> bool:
    """Whether Sentinel Hub OAuth client-credentials are available."""
    return bool(
        os.environ.get("SENTINELHUB_CLIENT_ID")
        and os.environ.get("SENTINELHUB_CLIENT_SECRET")
    )


def run_or_skip(facade, **download_kwargs):
    """Run the live download when credentials exist, else print a skip note.

    Keeps the notebook executing top-to-bottom with no errors whether or not
    Sentinel Hub credentials are configured (so the docs build never needs
    secrets). Set SENTINELHUB_CLIENT_ID / SENTINELHUB_CLIENT_SECRET to run the cell for real.
    """
    if not has_sh_credentials():
        print(
            "No Sentinel Hub credentials found - skipping the live download.\n"
            "Mint an OAuth client_credentials pair in the CDSE Dashboard and set\n"
            "SENTINELHUB_CLIENT_ID / SENTINELHUB_CLIENT_SECRET (see the Authentication page)."
        )
        return []
    results = facade.download(**download_kwargs)
    for item in results:
        print(item)
    return results

import os from pathlib import Path def has_sh_credentials() -> bool: """Whether Sentinel Hub OAuth client-credentials are available.""" return bool( os.environ.get("SENTINELHUB_CLIENT_ID") and os.environ.get("SENTINELHUB_CLIENT_SECRET") ) def run_or_skip(facade, **download_kwargs): """Run the live download when credentials exist, else print a skip note. Keeps the notebook executing top-to-bottom with no errors whether or not Sentinel Hub credentials are configured (so the docs build never needs secrets). Set SENTINELHUB_CLIENT_ID / SENTINELHUB_CLIENT_SECRET to run the cell for real. """ if not has_sh_credentials(): print( "No Sentinel Hub credentials found - skipping the live download.\n" "Mint an OAuth client_credentials pair in the CDSE Dashboard and set\n" "SENTINELHUB_CLIENT_ID / SENTINELHUB_CLIENT_SECRET (see the Authentication page)." ) return [] results = facade.download(**download_kwargs) for item in results: print(item) return results

Build the request¶

In [ ]:

from earthlens import EarthLens

facade = EarthLens(
    data_source='sentinel-hub',
    dataset='sentinel-2-l2a-ndvi',
    variables=[],
    start='2020-06-10',
    end='2020-06-20',
    aoi=[14.24, 40.80, 14.27, 40.83],
    path='data/sh-quickstart',
    resolution=20,
)
print('output kind:', facade.datasource.OUTPUT_KIND)
print(
    'plane:',
    facade.datasource._resolve_plane() if has_sh_credentials() else 'process (auto)',
)

from earthlens import EarthLens facade = EarthLens( data_source='sentinel-hub', dataset='sentinel-2-l2a-ndvi', variables=[], start='2020-06-10', end='2020-06-20', aoi=[14.24, 40.80, 14.27, 40.83], path='data/sh-quickstart', resolution=20, ) print('output kind:', facade.datasource.OUTPUT_KIND) print( 'plane:', facade.datasource._resolve_plane() if has_sh_credentials() else 'process (auto)', )

Render¶

In [ ]:

paths = run_or_skip(facade)
paths

paths = run_or_skip(facade) paths