1. Automated digital terrain models;Ayeni,1978
2. Tabular representations of multivariate functions—with applications to topographie modeling;Boehm,1967
3. Quadtree representations of digital terrain;Chen,1986
4. Strategies for spatial data compression;Clarke,1985
5. Efficient encoding of gridded surfaces: spatial algorithms for processing land data with a microcomputer;Dutton,1983