Use of Remote sensing and GIS

Landsat

Landsat TM – 12/30/2000 – Color composite 3-2-1.

The red line delimites the protected area.

This Landsat TM image shows the Ha Long Bay in natural colours with the three first spectral bands respectively in the green, blue and red channels. The spatial resolution is 30 m (when displayed in full resolution as is the case for the global view of the Ha Long Bay area above).

Due to meteorological conditions in the region of Ha Long, it is very difficult to obtain cloudless satellite images. The image above is a small part of a Landsat TM scene (180 by 180 km). On the left side, the cloud cover is complete while over Ha Long Bay the clouds are transparent. Such conditions can significantly perturb remote sensing applications.

Diachronic analysis can be applied using such Landsat TM images. The following documents show results of interpretation of Landsat TM images for the Ha Long city area :

• Map of land cover in the Ha Long city area, Quang Ninh province (1988).
• Map of land cover in the Ha Long city area, Quang Ninh province (1998).
  
  
• General map of land cover change in the Ha Long city area, Quang Ninh province (1988-1998).
• Map of unchanged land cover in the Ha Long city area, Quang Ninh province (1988-1998).
• Map of changed land cover in the Ha Long city area, Quang Ninh province (1988-1998).
  
  
• Map of forest cover change in the Ha Long city area, Quang Ninh province (1988-1998).
• Map of mangrove cover change in the Ha Long city area, Quang Ninh province (1988-1998).
• Map of agricultural land cover change in the Ha Long city area, Quang Ninh province (1988-1998).
• Map of land cover change of urban settlements in the Ha Long city area, Quang Ninh province (1988-1998).
• Map of land cover change for coal mining operations in the Ha Long city area, Quang Ninh province (1988-1998).
  
  
• Map of master development planning for Ha Long city, Quang Ninh province (1994-2010).
  
  
• Map of potential land cover change due to the direct impact of the Master Development Plan of Ha Long city (1998-2010) (scenario 1).
• Map of potential land cover change due to the direct impact of the Master Development Plan of Ha Long city (1998-2010) (scenario 2 : Buffer zone for transport infrastructure = 25 m; Settlements = 50 m; Industrial area = 100 m).
• Map of potential land cover change due to the direct impact of the Master Development Plan of Ha Long city (1998-2010) (scenario 3 : Buffer zone for transport infrastructure = 50 m; Settlements = 100 m; Industrial area = 200 m).