MODIS, 16-Day NDVI Normalized Difference Vegetation Index (NDVI) derived from MODIS data is provided here on a 16 day basis for the conterminous United States. The original band files used to derive the NDVI are also available and a band file with cloud information (for data from 2001 to the present). Data are in GeoTIFF and have been projected to Alber's.     MODIS, Vegetation Continuous Fields The three data files included are percent trees, bare, and herbaceous. This product contains three available layers which add up to represent 100% ground cover. The three layers can be properly displayed in a Red, Green, Blue band combination. Data is available in Goode's projection or Lat/Long.     MODIS, 500m, 32-Day Global Composites Composites were derived from the MOD09A1 eight-day surface reflectance product. MODIS bands 1 through 7 (red, NIR, green, blue, SWIR, SWIR, SWIR) are available in single band GeoTIFF files in continental subsets. These composites were used to derive the MODIS Vegetation Continous Fields product.     IUCN/UNEP World Database On Protected Areas This dataset contains GIS layers of protected areas that were produced by the World Conservation Union (IUCN) and the United Nations Environment Programme (UNEP). The 2003 dataset includes protected areas recognized at the international and national levels. Data are provided as ESRI Shapefiles by points or polygons.     AVHRR, Global Land Cover Product These classified data products are available in resolutions of 1km, 8km, or 1 degree that cover the entire Earth. The 1km data has also been split into continental subsets. Except for the 1 degree resolution, data are available in either Goode's or Lat/Long.     AVHRR, Continuous Fields Tree Cover Product These data products are available on a global scale or in continetal subsets in either Goode's or Lat/Long. Each product contains an overall treecover data file and files separated according to the following tree cover types: broadleaf, deciduous, evergreen, and needle leaf.     AVHRR, Global Production Efficiency Model: 10 Day Global NPP The Global Production Efficiency Model (GloPEM) generates global maps of Net Primary Production (NPP) as well as maps of the many other global variables. These datasets are available on a global scale.     AVHRR, Global Production Efficiency Model: Summed Annual Global NPP The Global Production Efficiency Model (GloPEM) generates global maps of Net Primary Production (NPP) as well as maps of the many other global variables. These datasets are available on a global scale.