Change detection

A comparison of satellite images or aerial photos taken at different time (over a period of 24 years) evinces the major changes occuring in the region . Such analysis allows to clearly highlight the most fragile regions conservation efforts should focus on.

Aerial photography interpretation for Ha Long city area (1969 - 1985 - 1993) :

• Land cover in Ha Long city area, Quang Ninh province (1969).
• Land cover in Ha Long city area, Quang Ninh province (1985).
• Land cover in Ha Long city area, Quang Ninh province (1993).
  
  
• Unchanged land cover categories (1969-1993).
• Changed land cover categories (1969-1993).
  
  
• Forest cover change (1969-1993).
• Land cover change for mangrove and aquaculture (1969-1993).
• Agricultural land cover change (1969-1993).
• Land cover change for human settlements (1969-1993).
• Land cover change for industrial area and coal mining operations (1969-1993).