后来,随着人们对大气对辐射影响的理解,蓝波段和一系列校正因子与系数被引入公式,发展出适用于不同冠层、土壤背景、大气状况的植被指数。 1. NDVI(Normalized Difference Vegetation Index) 不多介绍,这应该是应用地最广的植被指数了... \[NDVI=\frac{NIR-Red}{NIR+Red}\] def getNDVI(image): # Normalized d...
Based on the geographically weighted regression model, this study further analyzed the spatial heterogeneity between road GVI and the normalized difference vegetation index (NDVI). The results showed that the average road GVI at sample point level, road level, and county level within the study area...
Normalized Difference Vegetation Index versus Dark Green Colour Index to estimate nitrogen status on bermudagrass hybrid and tall fescueNormalized Difference Vegetation Index versus Dark Green Colour Index to estimate nitrogen status on bermudagrass hybrid and tall fescueIn recent years digital sensors have ...
9 RegisterLog in Sign up with one click: Facebook Twitter Google Share on Facebook Green Mountains Thesaurus Encyclopedia Wikipedia Green Mountains A range of the Appalachian Mountains extending from southern Quebec, Canada, through Vermont to western Massachusetts. The range rises to 1,339 m (4,...
The data resolution is 30 m, taken during the growing season of vegetation (Hansen et al., 2013), and the NDVI (Normalized Difference Vegetation Index) is applied to define pixels of vegetation by using a value of 0.1 as the threshold, following the method in a previous study that uses ...
First, we used a maximum value composite approach to generate the yearly vegetation green metrics across 1028 urban cities globally by selecting the maximum normalized difference vegetation index (NDVI) value on a pixel-by-pixel basis from the clear-sky satellite time series. In addition to the ...
The Normalized Difference Vegetation Index (NDVI), the NYC Street Tree Census, and access to major green spaces served as measures of greenness, while proximity to waterfront areas represented access to blue space. Associations between these factors and adverse birth outcomes, including preterm birth,...
(e.g., percentage of GS, averaged Normalized Difference Vegetation Index) show a more consistent association with health than metrics of residential proximity accessibility (e.g., distance to nearest GS, GS availability in pre-set distance)38. Our results showed no association between stress-...
The normalized difference vegetative index (NDVI) differencing techniques revealed vegetation shrinkage from 31.0 km2 in 1980–5.02 km2 by 2015 with a 7.16 m2 per capita value; less than World Health Organization standard of 8 m2 (Li and Pussella, 2017). Nevertheless gradual decline...
Spatiotemporal contextual uncertainties in green space exposure measures: exploring a time series of the normalized difference vegetation indices 10.3390/ijerph16050852 Google Scholar Helbich et al., 2019 M. Helbich, Y. Yao, Y. Liu,et al.