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.
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Chakaria HDSS
Matlab HDSS
Dhaka City
Choosing a site greys out everything that does not apply there.
- +DATA HUBSwhere the data physically comes from
- +DATASET TYPESgrouped by what kind of water they see
- +SITE-WISEwhat actually applies at each site
- +DURATION & CAPTURE CADENCEdaily · weekly · 10-day · 16-day · monthly
- +VARIABLESwhat is computed from the bands
- −LIMITATIONSwhy not — typed and severity-ranked
- +PAPERSthe evidence, DOI-linked
HIGH No 620 nm band, so phycocyanin is a proxy only spectral
Sentinel-2 cannot measure the cyanobacteria-specific phycocyanin absorption feature. The B3/B5 ratio used as a stand-in responds to chlorophyll as well, so it cannot cleanly separate a harmful cyanobacterial bloom from a benign green-algal one.
What to do: At Chakaria and Matlab use Sentinel-3 OLCI band Oa07 for the true retrieval. At Dhaka - where cyanobacteria dominate - only the proxy exists. That is the main methodological risk in the study and it must be stated in the limitations section.