The Application Of GML In Power Geographical Information System

So far, the maximal control system creaded by human is the power system. This system is widely distributed, and its equipments are complex. The technology of GIS applied in the power system, thus greatly enhanced the power system efficiency, quality of management and scientific of decision-making. But in the GIS field there are many geographic information encoding ways, resulting in the lack of unity for data types, which has brought inconvenience for the storage and transmission of data. The Open GIS Union (OGC) launched XML-based coding standard - Geography Markup Language (GML) in April 20, 2000. As uniform geographical information encoding, GML has been accepted by many GIS software companies. For a long time, the power system also have the problem of no unified format in its geographic information system, which brought inconvenience to the collaborative work of its subsystems.In view of this, this article will introduce GML to power system and solve a range of related issues, such as the description of system components, CIM standards for the support of GML, GML-based power system graphics information integration frameworks, and so on. Taking into account that GML does not support the direct display of geographic information, its display way becomes another focus of study. At first, This paper put forward a way that transform the data in GML format into SVG format, and then displayed in the IE browser, and then it proposed a new idea: the data in GML format can be transformed into the format that Google Earth software supported -KML, and display in Google Earth client.Google Earth (referred to GE) is developed by Google as Virtual Earth software, and it provides a simple environment of display for geographical information. Through examples this article shows that: It is totally feasible to show the power system information with Google Earth, and the results are satisfactory.