This paper presents a study on the feasibility, mechanisms and key technology for integrating GIS and OA in the Browser/Server (B/S) architecture, on the basis of a comparative analysis of the independent development model and the integrated development model of GIS and OA. Presently, the development of GIS and OA is mainly based on the two models: Mainframe-Terminal (M -T) model upon stand-alo...

GIS and Modeling Overview MICHAEL F. GOODCHILD NATIONAL CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS UNIVERSITY OF CALIFORNIA SANTA BARBARA, CALIFORNIA Modeling can be defined in the context of geographic information systems (GIS) as occurring whenever operations of the GIS attempt to emulate processes in the real world, at one point in time or over an extended period. Models are useful and u...

Handling time in geospatial information systems (GIS), the applicability of these valuable systems will increase, so, there hardly exist an application dealing with spatial information which can not be benefited from a temporal GIS. Despite many efforts undertaken since 1980, there is no generally accepted model which can satisfy all temporal GIS requirements. One of the most important problems...

Many of the functions performed by GIS seem to be amenable to a business model that is fundamentally diierent from the one we see today. At present, GIS users typically own the hardware and software they use. They pay license and maintenance fees to various vendors. The alternative would be a service-oriented approach where users make their input data available to some GIS service center that p...

This paper focuses on the deployment of Geographical Information Systems (GIS) and Spatial Data Infrastructures (SDI) within local government in Thai Provinces. GIS has been used extensively within local government and many countries have undertaken SDI initiatives, but these tend to focus at the national level, failing to address the local deployment issues. By their nature as infrastructures,...

Geographic data, stored and processed in a GIS, form a conceptual model of the real world. The abstraction of the real world to construct the conceptual model unavoidably results in differentiation between objects of the real world and their representation in GIS (i.e., computer). Since classical set theory is used in conventional GIS software systems to model uncertain real world, the natural ...

Although geographic information system (GIS) education has been spread widely, it becomes increasingly apparent that twodimensional maps cannot be precisely present multidimensional and dynamic spatial phenomena. It seems that merging GIS and Virtual Reality (VR) is a way to deal with these issues in terms of GIS classroom teaching. Virtual learning environment is the simulation of teaching met...

Many challenges are associated with the integration of geographic information systems (GISs) with models in specific applications. One of them is adapting models to the environment of GISs. Unique aspects of water resource management problems require a special approach to development of GIS data structures. Expanded development of GIS applications for handling water resources management analysi...

Fertilised cropland is a potential non-point source of nitrogen contributing to the nutrient enrichment of surface water ecosystems. Nitrogen is present in drainage outflow primarily because of the addition of fertilisers. The purpose of this study is to model the nitrate leaching to surface waters using a quasi twodimensional mechanistic flow model (DRAINMOD) in combination with a GIS. The GIS...