Parent Layer: Other derived products, Olive Branch

Name: Ash Tree Health Index

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Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Broad band based vegetation indices, based on sensors with broad wavelength region bands, are the most frequently used indicators for monitoring ecosystem dynamics and vegetation health. Many vegetation indices have been developed and applied in vegetation studies since the first vegetation index was introduced. Vegetation indices were created to evaluate cover, chlorophyll content, leaf area, phenology, and absorbed photo-synthetically active radiation. Since live green vegetation and tree canopy absorb solar radiation in the photosynthetically active radiation (PAR) spectral region, they scatter solar radiation in the near-infrared spectral region. When the two spectral regions are assessed in ratio-based indices, they contrast with cover that absorbs or reflects light similarly in both regions. This assessment used NDVI to calculate the health condition rating. </SPAN></P></DIV></DIV></DIV>

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