Content-Based Indexing of Spatial Objects in Digital Libraries

Digital libraries are being built upon internet-based systems of heterogeneous information bases which contain texts, images, audio, video, and graphics. A relatively unexplored but important research area for digital libraries is the indexing of spatial objects and 3-D geometric information. This paper provides some new content-based approaches to this area. Experience gained from building a digital molecular biology library including spatially indexed biological objects is described.