Assessing the worldwide developments of national spatial data clearinghouses

Abstract

Many countries have spent considerable resources over the past few years debating optimal national spatial data infrastructures. One of the (main) elements of these infrastructures is the national spatial data clearinghouse, which facilitates access to required spatial data and provides complementary services. With this in mind, in April 2000, 2001, 2002 and December 2000, 2001, 2002, a web survey was carried out to assess systematically the developments of these national clearinghouses worldwide. Regarding the development in the number of implementations, it can be considered a worldwide success. However, of concern are the declining trends in use, management and content. One of the main reasons for these negative trends could be the dissatisfaction of the spatial data community with the functional capability of current clearinghouses. The functional capabilities of clearinghouses should likely be changed from a data-oriented to a user and application-oriented focus. This is in accord with the objectives of the second generation of spatial data infrastructures. The main factors, therefore, that will have positive impacts on developments in this field are the inclusion of web services, stability of funding and creation of user-friendly interfaces.

Acknowledgements

The authors thank Dr Wies Vullings of Wageningen UR, Ir. Bastiaan van Loenen of Delft University of Technology and Brian Goodsell for comments and suggestions on earlier versions of this paper. The authors also acknowledge the support of all the webmasters of the national clearinghouses in the preparation of this paper. Their contributions were crucial for the results.