A Marine GIS for the Oceania Region (MARGO); An Exploratory Project

multiple dimensionality Three dimensions in space, one in time dynamism of marine data the inherent fuzziness of marine boundaries On land, usually hard boundaries (edge of property, side of a house) but most marine boundaries are very soft the need for spatial data structures that vary their relative positions and values over time must be able to simulate fluid or object motion, and be able to fix the motion at any moment in time. Marine data is often collected in profile form (horizontal and vertical) while land data are usually in area form Land data usually has total coverage, marine data usually has gaps. Deep bathymetry always has gaps.