Network panel

Algae Dataset

Every data hub, dataset, sensor, variable, paper and limitation in one tree — and for each: where it comes from, how far back it goes, how often it captures, why it belongs in a cholera study, and why it does not work everywhere.

Highlight site All three Chakaria HDSS Matlab HDSS Dhaka City Choosing a site greys out everything that does not apply there.

6. Derived / uncalibrated

AL20 · Landsat green/blue chlorophyll proxy (2000-2015 backfill)

(your own pipeline)

C Caution FREE NO ACCOUNT

Source · duration · capture cadence

Data source: (your own pipeline)
Access route: GEE
Endpoint / asset: computed in 06_algae_gee_3sites.py
Duration: 1984 → present
Capture cadence: 16 days
Resolution: 30 m
Delivers: Relative chlorophyll index only
Command: 10_algae_daily_3sites.py --sensors landsat

Why it is used for cholera. NOT VALIDATED

Why not — catalogue limitation. Landsat has NO red-edge band, so this is a weak substitute for NDCI. It is nonetheless the ONLY way to extend your algae record back to 2000. Be explicit about this limitation in any manuscript, and consider restricting formal inference to 2017-2026 with 2000-2016 as descriptive context.

Site applicability

Site	Verdict	Why
Chakaria HDSS	YES	USE WITH EXPLICIT CAVEAT
Matlab HDSS	YES	USE WITH EXPLICIT CAVEAT
Dhaka City	YES	USE WITH EXPLICIT CAVEAT

Reliable · accessible · authentic

C Caution

Reliability tier

OPEN

Accessible

(your own pipeline)

Authentic — operator

Documentation: https://doi.org/10.3389/fmars.2019.00598

Typed limitations (1)

HIGH Landsat green/blue chlorophyll proxy is uncalibrated validation

The ratio responds to chlorophyll but the relationship is scene-specific and unvalidated for Bangladeshi water. Absolute values carry no physical meaning.

What to do: Use it for RELATIVE change and phenology only. Always state it as an index and never report it in mg/m3.