Phenomap of Latium (IT)

Information on the coarse-scale vegetation phenology of Latium was obtained from the 16-day MODIS 250 m Enhanced Vegetation Index (EVI) product (MOD13Q1). EVI data proved to be effective in measuring dense vegetation regions, like Latium territory. From 2004 to 2015, 23 EVI images per year were acquired (i.e., 276 images totally). We next generated a mean annual EVI profile for each pixel by averaging the EVI values of each 16-day image over the period 2004–2015. On this basis, we segmented the study area and obtained landscape units (LUs) homogeneous in terms of vegetation phenology, i.e., with pixels showing similar EVI temporal patterns.

拉齐奥（Latium）区域的粗尺度植被物候数据，源自16天周期、250米分辨率的MODIS增强型植被指数（Enhanced Vegetation Index, EVI）产品MOD13Q1。EVI数据被证实可有效监测植被覆盖密集的区域，如拉齐奥辖区。2004年至2015年间，每年获取23景EVI影像，总计276景。随后，我们通过对2004至2015年间每景16天周期的EVI影像的像元值取平均，为每个像元生成年平均EVI剖面。在此基础上，我们对研究区域进行分割，得到植被物候特征均一的景观单元（Landscape Units, LUs），即具有相似EVI时序变化模式的像元集合。