Model calibration in progress · Sample data

H3 Atlas & Reference Assistant

The interactive H3 hexagonal workspace for reference agronomic indices is currently in pre-release calibration. Explore the structure of the 7 reference indices across our 4 pilot agro-ecological regions below.

Agronomic indices are for reference only, derived from FAO-56 formulas and open data. Not weather forecasts or official warnings.

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Sample H3 cell 8765b566affffff 10.03°N · 105.78°E

Rice, fruit orchards and aquaculture; key indices: salinity and leaf wetness.

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7 reference agronomic indices per H3 cell

Root-zone soil moisture m³/m³ (ref)

Estimated water available to crop roots, for reference.
soil_moisture_root_zone
Reference evapotranspiration (ET0) mm/day (FAO-56)

Atmospheric water demand by FAO-56 Penman-Monteith, in mm/day; the basis for crop water needs.
et0_mm_day
Growing degree days °C·day (ref)

Accumulated heat, linked to crop development stages.
gdd_accumulated
Saltwater intrusion index 0–1 scale (ref)

Reference index of conditions associated with saltwater intrusion.
salinity_risk_index
Frost index 0–1 scale (ref)

Reference index of conditions favourable to frost and cold spells.
frost_risk_index
Leaf wetness hours hours (ref)

Hours of wet foliage, associated with fungal disease conditions.
leaf_wetness_hours
Crop stress index 3-colour band

A combined reference signal of heat, water and weather stress on crops.
crop_stress_gravity_score