<<

West Africa Drylands Project | Vegetation | Annual average NDVI 2003

>>

The annual NDVI over the Sahel was taken from NOAA-AVHRR, and calculated from reflectance in the near infrared (NIR) and visible (VIS) regions:
NDVI = (NIR-VIS)/(NIR+VIS)
THe data used here is in 8 km resolution and was pre-processed by the GIMMS (Global Inventory Monitoring and Modeling System) group at NASA's Goddard Space Flight Center.
For each year the annual avearge NDVI was calculted from dekad (10-day maximum) NDVI data. To see rainfall for individual years click on the time-table below the map.


<<

West Africa Drylands Project | Vegetation | Annual average NDVI 2003

>>
Copyright by Mapjourney.com/Geofyskonsult. All rights reserved.
mapjourney.com is registered by geofyskonsult, Birger Jarlsgatan 102b 3tr, 11420 Stockholm, Sweden.

Disclaimer: The data used in the web-pages of mapjourny.com are only intended for viewing, No responsibilty is taken for other use of the maps and images. Maps and images may be used for private purposes, but not for commercial, educational or other similar purposes without the written consent of mapjourney.com.
Last modified Sun Mar 12 14:14:09 2006
webmaster: Maria Namboira

Article

Annual maps

Zoom maps

Search mapjourney.com

powered by FreeFind