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.
- +DATA HUBSwhere the data physically comes from
- −DATASET TYPESgrouped by what kind of water they see
- +1. Ocean colour (hyperspectral)1 datasets
- +1. Ocean colour (merged)3 datasets
- −1. Ocean colour (single sensor)5 datasets
- ·AL06 · MODIS-Aqua Level-3 SMIA Reliable4.6 km · Daily / 8-day / month… · 2002-07→present
- ·AL07 · SeaWiFS Level-3 SMIA Reliable9 km (4 km avail.) · Daily / 8-day / month… · 1997-09-04→2010-12-11 …
- ·AL08 · VIIRS SNPP / NOAA-20 chlorophyll (NOAA CoastW…A Reliable4 km (750 m for some SNPP products) · DAILY · 2017 (SNPP) / 2019 (N20)→present
- ·AL13 · MODIS-Terra Level-3 SMIB Usable4.6 km · Daily / 8-day / month… · 2000-02-24→present
- ·AL21 · OCTS / CZCS historical ocean colourC Caution9 km · Daily/monthly · 1978 (CZCS) / 1996 (OCTS)→1986 / 1997
- +2. Inland/coastal high-res6 datasets
- +3. Lake / inland operational2 datasets
- +4. Model / reanalysis1 datasets
- +5. Discovery / portal1 datasets
- +6. Derived / uncalibrated2 datasets
- +7. In-situ validation5 datasets
- −SITE-WISEwhat actually applies at each site
- −Chakaria HDSSChakariaRural COASTAL · 10 km to sea · 16 datasets apply
- ·AL01 · ESA Ocean Colour CCI v6.0 — merged multi-se…Daily / 5-day / 8-day / M… · 4 km (1 km regional available)
- ·AL02 · Copernicus Marine GlobColour — L4 gap-free …DAILY (gap-free!) · 4 km
- ·AL11 · Copernicus CDS — Satellite Ocean Colour (OC…Daily / monthly · 4 km
- ·AL06 · MODIS-Aqua Level-3 SMIDaily / 8-day / monthly · 4.6 km
- ·AL07 · SeaWiFS Level-3 SMIDaily / 8-day / monthly · 9 km (4 km avail.)
- ·AL08 · VIIRS SNPP / NOAA-20 chlorophyll (NOAA Coas…DAILY · 4 km (750 m for some SNPP products)
- ·AL13 · MODIS-Terra Level-3 SMIDaily / 8-day / monthly · 4.6 km
- ·AL03 · Sentinel-2 MSI Level-2A (harmonised)5 days (2-3 d with S2C fr… · 10 m (B2,3,4,8) / 20 m (B5 red-edge 705 nm)
- ·AL04 · Sentinel-3 OLCI — 21 bands incl. 620 nm (ph…~1-2 days (S3A + S3B) · 300 m full resolution
- ·AL05 · Landsat 5 / 7 / 8 / 9 Collection 2 Level-216 days per satellite (~8… · 30 m
- ·AL14 · Harmonized Landsat Sentinel-2 (HLS) v2.02-3 days combined · 30 m
- ·AL18 · Sentinel-2 Level-1C + ACOLITE Dark Spectrum…5 days · 10-20 m
- ·AL19 · GEE Sen2Cor L2A NDCI → chlorophyll polynomi…5 days · 10-20 m
- ·AL20 · Landsat green/blue chlorophyll proxy (2000-…16 days · 30 m
- ·AL23 · GLORIA — Global Reflectance community datas…Per sample · Point
- ·AL25 · Bangladesh Oceanographic Research Institute…Varies · Point
- +Matlab HDSSMatlabRural riverine · 250 km to sea · 11 datasets apply
- +Dhaka CityDhakaUrban inland · 300 km to sea · 9 datasets apply
- −Chakaria HDSSChakariaRural COASTAL · 10 km to sea · 16 datasets apply
- +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
1. Ocean colour (single sensor)
AL08 · VIIRS SNPP / NOAA-20 chlorophyll (NOAA CoastWatch)
NOAA CoastWatch
A Reliable
FREE
NO ACCOUNT
Source · duration · capture cadence
- Data source
- NOAA CoastWatch
- Access route
- ERDDAP — direct CSV, no login
- Endpoint / asset
coastwatch.noaa.gov/erddap → noaacwNPPVIIRSchlaDaily · noaacwNPPN20VIIRSchlociDaily- Duration
- 2017 (SNPP) / 2019 (N20) → present
- Capture cadence
- DAILY
- Resolution
4 km (750 m for some SNPP products)- Delivers
- Chlorophyll-a (OCI), Rrs, Kd490
- Command
07_algae_api_download.py --sources erddap
Why it is used for cholera.
NOAA operational product, routinely validated
Why not — catalogue limitation. Starts 2017 only. 4 km still too coarse for the estuary itself.
Site applicability
| Site | Verdict | Why |
|---|---|---|
| Chakaria HDSS | YES | YES — easiest daily coastal chlorophyll you can get · zero setup |
| Matlab HDSS | PARTIAL | Regional forcing only |
| Dhaka City | NOT APPLICABLE | NOT APPLICABLE |
Reliable · accessible · authentic
A Reliable
Reliability tier
OPEN
Accessible
NOAA CoastWatch
Authentic — operator
Typed limitations (1)
CRITICAL Both daily VIIRS ERDDAP endpoints are dead from this network access
00_verify_sources.py recorded TIMEOUT on noaacwNPPVIIRSchlaDaily and noaacwNPPN20VIIRSchlociDaily. That removes the easiest daily ocean-colour route entirely.
What to do: Reach VIIRS through Google Earth Engine instead. 12_download_all_free.py retries with the latitude axis flipped, logs the failure and carries on rather than crashing.