MSAVI2 The MSAVI2 vegetation index (Modified Soil Adjusted Vegetation Index) is used as a variant to extend the application limits of NDVI to areas with a high presence of bare soil. MSAVI2 is used in the areas where the indices such as NDVI or NDRE determined incomplete or erroneous data, mainly due to a small amount of vegetation or due to the lack of chlorophyll in it, for example in the phenological state of emergence. In this way, the index is used to minimize the influence of the soil background and to increase the dynamic range signaling vegetation. How is MSAVI2 used? The MSAVI2 is used in the initial stages of crop development , which it will allow us to observe the first seedlings that emerge. This index allows us to be more efficient in the use of fertilizers during the first stages, reducing the environmental impact and increase production significantly. NDRE The NDRE index (in English, Red Edge Normalized Difference) is very similar to the NDVI but its main difference lies in a safer solution, since it can detect variations in the health of crops in their most advanced stages, the reason is that red edge light (used in NDRE ) can penetrate leaves much deeper than red light (used in NDVI ) where there is more intense canopy it is advisable to use NDRE because NDVI it saturates This index detects changes in the content of chlorophyll , which is one of the main indicators of nitrogen inside the leaves. How is NDRE used? The NDRE is used in the later stages of the crop, where we can generate nitrogen fertilization maps in the most affected areas. NDWI The NDWI index (in English, Normalized Differential Water Index) is used to observe the water status of the crop. This index uses green and near-infrared bands from satellite images. The NDWI can improve water information efficiently in most cases. It is sensitive to the accumulation of land and results in the overestimation of water bodies. NDWI products can be used in conjunction with NDVI change products to assess the context of areas of apparent change. How is the NDWI used? As with other indexes, the values obtained in the NDWI range from -1 to 1, where the high values correspond with a high content of water in the plant and coverage of a large part of the plant and low values represent a low content of water in the vegetation and low cover. Login to Auravant "

Imagery and layers

Q: What is the difference between the NDVI and the GNDVI?

The GNDVI is more sensitive to the variation of chlorophyll in the crop than the NDVI and has a higher saturation point. The GNDVI can be used in crops with dense canopies or in more advanced stages of development, while the NDVI is adequate to estimate the vigor of the crop during the initial stages. Login to Auravant "

Q: What is Visible? The satellite image in Visible Light

In addition to the NDVI and GNDVI indexes, it is possible to view the RGB satellite image known as Visible in the bottom selector. It is important to view the Visible image first to verify that there are no clouds or cloudiness that may be affecting the NDVI and GNDVI indexes. Log in to Auravant "

Imagery and layers

What is the difference between the NDVI and the GNDVI?

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Versions of NDVI

What is Visible? The satellite image in Visible Light