Abstract

With the development of the Internet, especially Web 2.0, user-generated contents such as “Volunteered Geographic Information (VGI)” have gained attention and generated a lot of information over the Web. This chapter introduces the basic information about VGI and presents that VGI (or crowd-sourcing) applications have proven useful for gathering and sharing spatial information. However, one major problem of VGI is the existence of the semantic heterogeneity problem. A semantic-empowered analysis tool, which is able to automatically integrate and analyze a broad variety of spatial data contents, is needed to provide more utilities for VGI. The framework of an interoperable online VGI system based on Geospatial Semantic Web technologies was proposed. Some challenges or issues faced by VGI were discussed in this chapter.

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