Mapping Large Textures

Are there any cross-platform developer toolkit that assist application developer in mapping large (multiple gigabyte) terrain textures onto OpenGL primitives, possibly via some paging mechanism.
If not, are there any texture paging OpenGL example code for the MS-Windows platform ?

Take a look at It have links to lots of stuff like this. Most are academic technology demos - not finished products and the source is GPLed. It’d give you a good starting point though…