This document discusses building a standards-based collaborative GIS system. It defines different types of collaboration (synchronous/asynchronous, same place/different place). It advocates using open standards like WMS, WFS, SLD and XIMA to allow sharing of maps, annotations, and styles between distributed users and across different software. Finally, it outlines requirements for synchronous and asynchronous collaboration systems and proposes some technical architectures like client-server or peer-to-peer models using open-source GIS tools and protocols.

1. Building a Standards Based Collaborative GIS Ian Turton 1 and James Macgill 2 1 Centre for Computational Geography, University of Leeds, UK i.turton@geog.leeds.ac.uk 2 GeoVISTA Center, Department of Geography, Penn State, PA USA, jmacgill@psu.edu

15. Differential Styling

17. Annotated Map

20. Putting it together synchronously Remote Data Local Data Local Data Internet Publish maps and comments Publish maps and comments Receive maps and comments Receive maps and comments

21. Putting it together asynchronously Remote Data Local Data Local Data Internet Publish maps and comments Publish maps and comments Receive maps and comments Receive maps and comments Remote store

22. The client/server Map Client Map server User interface Communications GeoServer Mapserv Ionic Cubewerx GeoTools Deegree OpenMap Mapbender IMS VOIP Email Publish Receive