This paper presents a conceptual data model, the STA-model, for handling spatial, temporal and attribute aspects of objects in GIS. The model is developed on the basis of object-oriented modeling appr
The process of urban building reviewing is a collaborative work by a group of urban planning staffs and land managers who are working with different departments of a or- ganization. There are three in
This paper presents a hybrid model for three_dimensional Geographical Information Systems which is an integration of surface_ and volume_based models.The Triangulated Irregular Network (TIN) and octre
Temporal geographic information system(t_GIS) is a kind of computer information system that can display,process and analyze the micro_format distribution of temporal_spatial information of real world.
The rapid development of Internet technology makes it possible to integrate GIS with the Internet,forming Internet GIS.Internet GIS is based on a distributed client/server architecture and TCP/IP & II
The basic properties to be dealt with ,when considering initially the research needs related to the integration of remote sensing (RS) information into a geographic information system (GIS),are many_
Data mining techniques are used to discover knowledge from GIS database in order to improve remote sensing image classification.Two learning granularities are proposed for inductive learning from spat
一、GIS简介 气体绝缘全封闭组合电器也称SF_6全封闭组合电器,简称CIS(Cas Insulated Switchgear),是把整个变电站的一次设备,不包括变压器,全部密封在一个接地的金屑外壳内,壳内充有2.5~3.0×10~5Pa(表压)的SF_6气体,以保证对地、相间以及断口间的可靠绝缘。GIS内部包括有母线、隔离开关、断路器、PT、CT以及套管等。用化学性质不活泼的SF_6气体作为绝缘