Web-based GIS system development is a trend in both IT and GIS fields. It' s predicted that GIS
platform will be transformed from present local or Intranet one to Internet in the near future. In this
article, WebGIS was technically analyzed on its technology characteristic and development schemes. And
some key technical issues on development of an WebGIS were discussed in detail here. Then a practical
development scheme was designed and a prototype system was developed basing on it, which give us some
valuable experience on a practical WebGIS development.