NOAA Center for Satellite Applications and Research (STAR) normalized difference vegetation index (NDVI) maps. NDVI is a simple graphical indicator that can be used to analyze remote sensing measurements and assess whether the target being observed contains live green vegetation or not.

NDVI is the most common index that analysts use in remote sensing. But how do you calculate it? What do NDVI values represent? How do Earth scientists use NDVI?

NDVI is used to quantify vegetation greenness and is useful in understanding vegetation density and assessing changes in plant health. NDVI is calculated as a ratio between the red (R) and near infrared (NIR) values in traditional fashion:

Monitor Vegetation Health by Viewing & Comparing NDVI Values Through Time and Location with Sentinel-2 Satellite Images on The Fly! Initial NDVI Date 📅 initial

2019年12月13日 · Normalized Difference Vegetation Index (NDVI) is a compilation of visible and near infrared bands, ranges in value from -1.0 to 1.0, and is used to measure the vigor of vegetation on Earth. Web Map by esri_imagery

The normalized difference vegetation index (NDVI) is a widely-used metric for quantifying the health and density of vegetation using sensor data. It is calculated from spectrometric data at two specific bands: red and near-infrared.

5 天之前 · Vegetation indices measure the amount of green vegetation over a given area and can be used to assess vegetation health. A commonly-used vegetation index is the Normalized Difference Vegetation Index (NDVI), which uses the difference between near-infrared (NIR) and red reflectance divided by their sum. NDVI values range from -1 to 1.

This dataset contains a gridded daily Normalized Difference Vegetation Index (NDVI) derived from the Surface Reflectance Climate Data Record (CDR). The data record spans from 1981 to 10 days before the present using data from NOAA polar orbiting satellites [Advanced Very High Resolution Radiometer (AVHRR) and the Visible Infrared Imaging ...

2025年2月13日 · NDVI is an indicator of the greenness of the biomes. Every 10-days estimates are available in near real time at global scale in the spatial resolution of about 300 m from July 2020 to the present.

2025年3月25日 · Normalized Difference Vegetation Index (NDVI) An index of plant “greenness” or photosynthetic activity, and is one of the most commonly used vegetation indices. Definition source: GISGeography