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...

While community-based organizations (CBOs) increasingly seek to utilize geographic information systems (GISs) for neighborhood planning and development, many have serious misconceptions about what GIS can and cannot do and what is needed to make effective use of it. This article describes the problems and opportunities in utilizing GIS as a tool for enhancing participatory planning in three nei...

Recently, Web-based GIS applications have become important tools for disseminating geographical information in digital map format on the Internet because of their platform independence, interactivity, and wide accessibility. This trend brings about new insights on the integration of Web-based GIS and multimedia on the Internet since multimedia has already been seen as the strength of Internet a...

Geographical Information Systems (GIS) are becoming more prevalent for retailers in their use for both day-to-day and strategic decision-making. Given the array of internal and external databases they use, as well as the amount of organisational development, system implementation is a most apposite description of how a GIS supports retailing decision-making. System implementation has been one o...