國立臺灣大學建築與城鄉研究所LIN, FENG-TYANFENG-TYANLIN2006-09-282018-06-292006-09-282018-06-291998http://ntur.lib.ntu.edu.tw//handle/246246/20060927122941539589Although many GIS data models are available, a declarative, operational, well-defined, implementation-independent, and objectoriented language is lacking. Based on the theory of many sorted algebra, this work presents a family of geometric data models. Some geographical data models of urban information systems are illustrated using homomorphism. According to the results, the preferred characteristics of mixing declarative and operational statements, multiple representations, tight interdependency among objects, and integration of vector and raster based systems can be achieved through this mechanism. int. j. geographical information science. 1998. vol.12. no. 765-788. 1. many sorted algebraic data models for gis. feng-tyan lin. graduate institute of building & planning. national taiwan. university.. #1. sec.application/pdf197274 bytesapplication/pdfzh-TWjournal articlehttp://ntur.lib.ntu.edu.tw/bitstream/246246/20060927122941539589/1/many sorted algebra.pdf