In this study, a hybrid GIS-supported watershed modelling system is developed for integrated planning of water pollution control in the Lake Erhai basin, China. The system comprises a GIS-supported database, simulation/optimization models, and user interfaces developed through Arc/Info and ArcView. An inexactfuzzy multi-objective optimization model is developed for assessing a variety of system...

A high-speed earthing switch (HSES) of a gas-insulated switchgear (GIS) performs a secondary role in protecting the power system in the event of an accident. After being interrupted by a circuit breaker (CB), the short-circuit current remaining in the network should be earthed by the HSES. However, as the contacts of the HSES may have been damaged by a pre-arc during the closing operation, the ...

This paper presents a novel divide-and-conquer method to analyze spatial information, such as geometric shapes, contours and trajectories extracted as a discrete sequence of points (or pixels) from images or spatial sensors, including GPS or transponders. The method extracts contour point sequences and then uses a scale invariant analysis to extract invariant arc features. The arc feature is a ...

Geographic Information Systems (ARCGIS-ESRI) have tools to produce cartographical generalizations that are based in spatial transformations which alter the geometrical data and topological representation. The major spatial objects use vector as the basic entities for representation. Vectorial generalization has been well studied and is the most common transformation used in existent systems. Th...

This paper aims to present terrain characteristics of Kuya river basin specially relief zoning, aspect analysis, hill shade view, its relation with drainage conditions etc. Analysis of SRTM data in ERDAS Imagine and Arc GIS software reveals that there is no siginificant relief difference between upper and lower catchment of the basin but distinction between upper and lower catchments is very cl...

Gas insulated switchgear (GIS) plays a vital role in high voltage transmission of electrical energy due to its advantages of high reliability and performance, compact in dimensions and outstanding compatibility with the environment. It uses sulphur hexafluoride gas as its insulant and coolant because of its high dielectric strength and excellent arc quenching ability. Gas insulated switchgear i...

Taken 1:10000 Scale topographic map in the small watershed of Genxi River as an example, under the support of ARCVIEW and ARC/INFO software of GIS, through digitizing topographic map and other special maps to set up a spatial geodatabase. This paper forms a digital elevation model and has an analysis of slope and aspect, also discovered knowledge referenced for soil and water conservation. The ...

Earthquake, flood, and drought data from different sources are combined in a single data set using the same data structure, projection, and scale. The intensity and frequency of each hazard is classified into severe, heavy, modest, and light, producing a dassification with 64 combined states for the three kinds of hazard. These classes are then ranked according to severity. The three hazard cov...