Earth 3D Modeling For Weather Forecast Presentation

Abstract

In this paper, we put forward the development of a solution allowing modeling and exploitation
of real time synthesized images of the globe. This is used for presenting the weather forecast
bulletin of Tunisian television Channel 7. This presentation requires a smooth panning to any
part of the world, while having the necessary level of detail. To store and handle geographical
data, most of the used methods implement a tree structure of data where various threads come out
of each node (four in the case of quadtree). Recursively, one goes down the tree until a satisfactory
level of detail is reached. Our contribution consists in the adaptation of this algorithm to a
sphere and the exploitation of various filtering, storage and optimization techniques in connection
with the available material