Contents
How do I download NDVI MODIS data?
How to Download MODIS data
- Step 1: Define Your Study Area (AOI)
- Step 2: Define the Data That You Want to Download.
- Step 3: Define Selection Criteria.
- Step 4: View Results & Select Data to Order / Download.
- Step 5: Download Your Data.
What is an NDVI map?
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.
Where can I find AVHRR NDVI coverage maps?
Coverage Maps indicating the availability of AVHRR NDVI Composites are available for download. Access Data EarthExplorer can be used to search, preview, and download AVHRR Composites, Orb SEG, and Global 1K data. The collections are located under the AVHRR data set.
What are some of the county level data sets?
County-level Data Sets County-level Data Sets Socioeconomic indicators like poverty rates, population change, unemployment rates, and education levels vary geographically across U.S. States and counties.
Are there weekly NDVI composites based on AVHRR data?
Weekly and biweekly NDVI composites based on 1-km AVHRR data (1989 to 2019). To all users of AVHRR composites. The NOAA 19 satellite which currently supports the AVHRR sensor has been degrading in orbit to the point where the nadir view is on the day night terminator within its orbit. (Public domain) To all users of AVHRR composites.
How does the normalized difference vegetation index ( NDVI ) work?
Landsat Surface Reflectance-derived Normalized Difference Vegetation Index (NDVI) are produced from Landsat 4–5 Thematic Mapper (TM), Landsat 7 Enhanced Thematic Mapper Plus (ETM+), and Landsat 8 Operational Land Imager (OLI)/Thermal Infrared Sensor (TIRS) scenes that can be successfully processed to Landsat Level-2 Surface Reflectance products.