This text shows how the principles and technologies of object-oriented programming, distributed processing and internet protocols can be embraced to further the reliability and interoperability of datasets for the professional GIS market. The book describes the central concept of the interface specification between the data consumer and producer - the Virtual Data Set VDS. It then examines how VDS deals with two other classes of model - field representations and modelling uncertainty. The final part of the book looks at implementation, describing how the VDS interacts with PostScript, Java, and Object-oriented modelling environments.
Introduction: Problem statement, background, road map. Part 1: Interoperability - interoperability in geoprocessing; overview; data migration; integration and databases; data integration and geographical information systems; review; virtual data set - overview; interoperability impediments; approaches for improvements; open geodata interoperability specification; the virtual dataset concept; review. Part 2: Essential models - example - field representations - overview; continuous fields; measurement of fields; current representation techniques; characteristics of the domain D; characteristics of the range; analysis of continuous field data; impediments; review; modeling uncertainties - introduction; uncertainties; methods for the modeling of uncertainty; assessing the uncertainty of functional expressions; digital representation; numbers, units and dimensions; review. Part 3: Implementation - case studies - introduction.