Usage

Vegetation Indices

A single flexible endpoint for generating and retrieving any of 9 supported vegetation indices. Choose the index that best suits your monitoring needs.

Process Vegetation Indices

Use processVegetationIndices() to request a specific index for a polygon and date range:

GraphQL Mutation

mutation { processVegetationIndices( polygonId: "abc123-def456-ghi789" startDate: "2025-06-01" endDate: "2025-08-31" indexType: "NDVI" dailyEstimates: false ) { Status Message Result { requestId } } }

Parameters

polygonId REQUIRED

The polygon to analyze.

startDate REQUIRED

Start of the analysis period (YYYY-MM-DD).

endDate REQUIRED

End of the analysis period (YYYY-MM-DD).

indexType REQUIRED

The vegetation index to compute. See the table below for supported values.

dailyEstimates

Optional boolean. When true, generates ML-based daily estimates between satellite passes. See Daily Estimates.

Retrieve Vegetation Indices

GraphQL Query

query { retrieveVegetationIndices( polygonId: "abc123-def456-ghi789" startDate: "2025-06-01" endDate: "2025-08-31" ) { colorlegend png tif json } }

Supported Indices

Index	Full Name	Description
`NDVI`	Normalized Difference Vegetation Index	The most widely used index for measuring vegetation health and photosynthetic activity. Values range from -1 to 1, with healthy vegetation typically above 0.3.
`NDWI`	Normalized Difference Water Index	Measures water content in vegetation and soil. Useful for detecting water stress and irrigation issues.
`MSAVI2`	Modified Soil-Adjusted Vegetation Index 2	Reduces soil brightness influence on NDVI readings. Ideal for areas with sparse vegetation or bare soil.
`LAI`	Leaf Area Index	Estimates the total area of leaves per unit ground area. Important for understanding canopy structure and light interception.
`NDRE`	Normalized Difference Red Edge	Uses the red-edge spectral band, which is more sensitive to chlorophyll content changes. Good for detecting early stress in dense canopies.
`EVI`	Enhanced Vegetation Index	Corrects for atmospheric and canopy background influences. More accurate than NDVI in areas with dense vegetation.
`EVI2`	Enhanced Vegetation Index 2	A simplified version of EVI that does not require blue band data. Useful when blue band data is unreliable.
`RVI`	Ratio Vegetation Index	A simple ratio of near-infrared to red reflectance. Effective for distinguishing vegetation from non-vegetation.
`GNDVI`	Green Normalized Difference Vegetation Index	Uses the green band instead of red. More sensitive to chlorophyll concentration and useful for assessing nitrogen uptake.

Tip: For most crop monitoring use cases, start with NDVI for general health and NDWI for water management. Use NDRE or GNDVI when you need higher sensitivity to chlorophyll variations in dense canopies.