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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B4. Istanbul 2004 
  
4. MODEL OF ENVIRONMENT POLLUTION 
4.1 Texture projection 
In order to improve the third dimension of 3D terrain, we need 
to overlap corresponding terrain map with an appropriate 
Terrain model. The surface of the model is a curved surface 
made up of large amount of polygons area, while the texture is 
plane, we must employ definite arithmetic to match them, and 
make texture projection. It is a mapping relationship in a kind 
of a fine transformation. 
X=ap+ a; Xt + ay + 33X,Y, 
Y= b, + bi X, + bY, + b3XY, 
X,Y, = corresponding terrain model point coordinates 
X, Y, 7 coordinates of a point in texture 
Ai, bi eight transformation parameters which can be calculated 
to the four angle point of the texture, and used to confirm 
project relationship between the texture and terrain 
Figure 6. GeoVRML of polluted area 
461 
4.2 CONCLUSION 
In this paper, we show that GeoVRML-technology can provide 
another perspective of an important ecological problem. This 
way of visualization should be implemented in any ecological 
research to provide help for a better decision making. 
Often the best way to understand and learn about complicated 
scientific ideas is to see them represented in 3D. Scientists are 
also eager to explain the excitement of their areas of expertise 
in ways that didn't involve long, boring paragraphs in dusty 
textbooks and unsatisfying pictures, diagrams and tables that 
are hard to understand. GeoVRML provides a general way to 
specify many of the features that scientists need to visualize, 
including seafloor terrain at the highest resolution. 
By a successful decision of proper recovery technique, the 
Bakar Bay might be transformed from an enormous ecological 
hazard to a revitalized maritime centre. Application of modern 
standards in 3D visualization applicable to the Internet can help 
in raising the public awareness of ecological problems and 
importance of the recovery process. 
  
Figure 7. Position of Bakar Bay 
(© State Geodetic Administration Copyright 2004)