Summary

Current data sharing in the Internet environment is through metadata at the file level. This has two fundamental shortcomings. One is that data sharing at the file level usually requires data integration like data conflation. The other is that data sharing at the file level makes it difficult to provide spontaneous data search, access and data exchange at the feature level. This seminar discusses a standard-based framework of sharing geospatial data without requiring data conflation and allowing instant data access and exchange at the feature level. This framework is based on several national and international standards, i.e., the standard geospatial data model proposed by the Geospatial One-Stop initiative for data modeling, Geography Markup Language (GML) to code and link geospatial data, the Web Feature Service (WFS) to access and extract data at the feature level, and the Scalable Vector Graphics (SVG) standard to display GML data on the Web browser as maps. Two transportation network datasets are used in the case study. The prototype shows that the proposed framework is capable of sharing data without data conflation, and that data changes at one database can be automatically reflected in another related database without data downloading.