FRAME water-quality estimation data
===================================

Coverage
--------
Stations: 20
Stations with WQI: 16
Measured parameters: 13
Sampling periods: 12 (2022-06 to 2023-12)
Parameter observations: 3069
WQI observations: 191

Files
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water_quality_stations.geojson
    WGS84 point locations with station descriptions and latest WQI.
water_quality_observations.csv
    Long-format WQI and parameter observations by station and month.
water_quality_data.json
    Complete browser payload, including scales, WQI classes, and validation.

Method and limitations
----------------------
* Points were transformed from the supplied VN-2000 TT-Hue shapefiles to WGS84.
* WQI is displayed at stations only. No spatial interpolation was performed.
* The source package contains 13 measured parameter layers and 16 WQI stations.
* The four lagoon stations have parameter measurements but no WQI values.
* Parameter colors are observed quantiles, not regulatory compliance classes.
* Total coliforms are exposed as MPN/100 mL; the source workbook's mg/L label
  is retained as a documented source-unit inconsistency.
* The source's overlapping lowest WQI threshold was normalized to 0-25.

Source
------
Prepared from the FRAME water-quality source package supplied for local
development. Review the application Data and source section before reuse.
