The application of geospatial information has become the important tool for modern countries to enhance their competitive edges. To uplift decision quality of governments of all levels, government agencies in advanced states have begun to apply geotechnology in wide sense. Taiwan started promoting national geographic information system in 1992 and introducing geotechnology into government agencies.

The National geographic information system (NGIS) is a national development project proposed by NGIS panel of Executive Yuan as one of the important administrative projects for Taiwan to achieve total e-government. NGIS links with many government agencies, each requiring the use of other’s data and services. Presently, US and Canada pioneer in promoting service oriented architecture (SOA) for geographic information to gradually arrive at data sharing. Every agency publishes its generated data as standardized on-line service which is available on-line to an applying agency, thus no data duplication or file conversion is needed to build the application system.

With the development of broadband internet and multi-platform process, the future GIS will gradually provide multi-platform operable functions in distributed framework for the process of geospatial data or geospatial information of different sources. In the trend of “Open GIS”, users can use the geospatial library and information published by the data generating nodes, in OGC related specification. In such mechanism, one who requires data can access to and display geospatial data at user end in a real-time manner, using GIS products that support these open geospatial formats, to assist in geospatial decisions.