GeoPard Raster Processing Block
Calculates NDVI, EVI, SAVI, NDWI for satellite images.
The GeoPard Vegetation Indexes block retrieves the preselected satellite image from the available constellations, applies the preselected vegetation index calculation on top, and packs the output as cloud-optimized GeoTIFF.
The processing block capabilities include:
integrated satellite constellations: Pleiades, Pleiades NEO, SPOT
supported vegetation indexes: NDVI, EVI, SAVI, NDWI
the output in COG format (Cloud Optimized GeoTIFF)
NDVI – Normalized Difference Vegetation Index (from 0 to 1) is a good crop health indication, representing green vegetation distribution. Though there are limitations when using this view at the start of the growing season (influenced by soil) and at the peak of vegetation (saturation). It is shown from red to green on the map.
EVI – Enhanced Vegetation Index (from 0 to 1), is preferable to NDVI for fields with high canopy density where NDVI may saturate. This view can be used to analyze crops in all growth stages.
SAVI – Soil Adjusted Vegetation Index (from 0 to 1.5) minimizes the influences of soil brightness. Most useful at the beginning of the season when plants are separated or in rows and when the soil is clearly visible and to the mid-growth stage when plants are still not touching.
NDWI – Normalized Difference Water Index. It is used to differentiate water from dry land and for water body mapping and highlights the water body areas.
More details about vegetation indexes can be found HERE.
Cloud Optimized GeoTIFF overview is HERE.
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