In physics, objects can be divided into rigid and soft objects according to the object deformation capacity. Similarly, geo-object can also be classified into rigid geo-objects (e.g., building, urban) and soft geo-objects (e.g., mudflow, water, soil erosion). There are three types of approaches for 3D GIS modeling, i.e., surface-based, volume-based, and hybrids in terms of geometry. These appro...

The security model proposed for the Geographic Information Systems (GIS) is a data, which is capable of visualizing technology and has the capability to apprehend, cache, verify, amalgamate, engineer and exhibit data with the help of digitized maps. It has enormous applications in the field of engineering, business management process, communication both in the private and public regions. A GIS ...

To improve the efficiency of existing emergency response and facility management systems, many utility companies choose to implement the ArcFM GIS. Based on my experience designing and implementing an ArcFM GIS for the Potomac Electric Power Company (PEPCO), Washington D.C., this paper provides a road map through implementation of an enterprise-wide GIS using technologies built-on ArcInfo 8 pla...

For analyzing partial discharge ultrasonic wave characteristic on typical defects in SF6 gas insulation switchgear (GIS), a 110 kV GIS was taken as an object to design and simulate the typical partial discharge models in GIS There are point electrode model on bus and cavity of GIS, floating electrode model, air interstice model in insulator, metal particle and iron core electromagnetic shock mo...

GIS systems are frequently coupled with fuzzy logic systems implemented in statistical packages. For large GIS data sets including millions or tens of millions of cells, such an approach is relatively timeconsuming. For very large data sets there is also an input/output bottleneck between the GIS and external software. The aim of this paper is to present low-level implementation of Mamdani’s fu...

The concept of the GIS as a centralized enterprise asset rather than a cartographic tool is gaining acceptance. Enterprise GIS takes an organizational approach for sharing and managing spatial information. At Otay Water District, we are integrating the departmental projects and data into a centralized GIS. A series of interviews was conducted within the District to make sure the new GIS system ...

Progress in GIS is increasingly dependent on the recognition that it plays a significant role as a “pure science.” This recognition is necessary to help stabilize the semantics of GIS terms, and to establish precise expected behaviors for GIS components. Both of these developments are essential if GIS is to help advance our knowledge of our environment or to be successful in the marketplace. Th...

Information System (GIS) has been well established as an information system for acquiring, storing, processing, analyzing and visualizing spatial data. The success of GIS is reflected from the following developments: (1) numerous GIS software have been developed and are widely used; (2) A large amount of spatial datasets have been collected and used; (3) Many books and papers have been written ...

ion and Decomposition in Interoperable GIS Agn es Voisard Heinz Schweppe Institut f ur Informatik Freie Universitat Berlin Takustr. 9 D-14195 Berlin fvoisard,[email protected] Abstract With the advent of distributed computing and the increasing trend towards the reuse of geographic data, a new generation of geographic information systems (GIS) is currently being speci ed. The key cha...

(With due deference to United States Founding Father, Thomas Jefferson) When in the course of human events it becomes necessary for one GIS user group to dissolve the licensing agreements which have connected them with a proprietary software vendor and to assume among the free and open source GIS users of the earth, the separate and equal station to which the capabilities of Geospatial Software...