[gdal-dev] charts on a sphere

[Malm Paul]

 Hi list,
I´m going to draw vector charts on a sphere with openGL, each chart shall be cut into smaller "submaps". I first thought I could do it in x,y,z coords in WGS84 but the I have to render the vector data all the time when changing view. Now I´m more into that the vector data shall be projected to a cartesian coordinate system. Each submap is the rendered to a p-buffer (raster) for current zoom. Then I will drape the submap rasters on a spher for viewing in different angles.

What is the best projection to store the "submaps" in? Each submap shall connect to the adjacent submap and the submaps can go around the globe. Is it a stereographic projection with a uniqe center point for each submap that I shall use? Or is there something else that is better for me?

Kind regards,
Paul