id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ajis02-314	Hadzilacos, Thanasis; Tryfona, Nectaria	Evaluation of Database Modeling Methods for Geographic Information Systems	1998	12	.pdf	application/pdf	5664	253	42	By connecting geographic object classes to POSITIONS (via the special relationship is_located_at, see previous figures) and POSITIONS to SPACE (via belongs_to) objects are related to the space-depending attributes. al., 1990) use the Entity-Relationship (ER) and object-oriented models respectively, to represent spatial objects and, (b) the extension of these models for the efficient handling of geoinformation; characteristic examples are (Benoit et.	cache/ajis02-314.pdf	txt/ajis02-314.txt