private companies S low-cost satellites 
national GOs and NGOs 
  
   
  
  
  
  
  
  
; ; statistics ; oe . 
international GOs and NGOs Se ; yz. Sahelian EO-data receiving stations 
airborne remotely . ; : 
regional planning sensed data — SCEOs (Sahelian Centers of Earth Observation) 
hydrolo 
ry landcover/landuse 
agriculture topography .... 
topography 
oe ; NOAA-AVHRR, Resurs-01 
id Sanelan international Landsat MSS, Landsat TM, SPOT 
health organisations IRS-1, ADEOS 
economic development . EarlyBird Conga. 
ecotogy CILSS | TRW-Lewis, TRW-Clark 
A OSs ERS, Radarsat .... 
E ; EO-data distributors — 
| | "n at] 
; ; i I 
Sahelian National Centers of Geoinformation -————————| ^ 54 costi 
-profit 
SNCGI 
Sahelian Regional Centers of Geoinformation  -——— — —— — 
SRCGI 
—_—— =p local counterparts IQ 
private, governmental, non-governmental 
individuals (farmers, pastoralists,..) 
————— regional counterparts — 
private, governmental, non-governmental 
2-1987 Figure 4. Plan of action for laying the foundations for Sahelian Environmental Information Systems. 
  
  
dcover 
  
  
International Archives of Photogrammetry and Remote Sensing. Vol. XXXII, Part 7, Budapest, 1998 107