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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
- +VALIDATION2 limitations · 1 critical
- +ACCESS6 limitations · 4 critical
- −SPATIAL6 limitations · 3 critical
- ·4 km pixel cannot resolve any inland water bodyCRITICALdataset AL01
- ·250 m works on the Meghna and nowhere else in this studyCRITICALdataset AL16
- ·Matlab shapefile contains 43 polygons from another upazilaCRITICALsite level
- ·300 m needs water wider than about 600 mHIGHdataset AL04
- ·1 km lake mask is unlikely to include your water bodiesHIGHdataset AL10
- ·Chakaria boundary has no internal unitsHIGHsite level
- +TEMPORAL7 limitations · 2 critical
- +ALGORITHMIC3 limitations · 1 critical
- +COVERAGE6 limitations · 1 critical
- +ATMOSPHERIC1 limitations
- +SPECTRAL2 limitations
- +PAPERSthe evidence, DOI-linked
HIGH Chakaria boundary has no internal units spatial blocks Chakaria
HDSS_Chakaria_Boundary.shp is a single polygon with only OBJECTID, Shape_Leng and Shape_Area. The 11 unions in the config are not in the file. The east side is hilly and the west is coastal lowland with the shrimp-pond belt - completely different hydrology and salinity.
What to do: Either request the union-level shapefile, or derive the stratum from SRTM elevation at or below 5 m combined with distance to coast. Pooling the two halves averages away the exposure contrast the study is trying to detect.