Disseminação de dados estatísticos georeferenciados através de WEB services e software livre.

Abstract

Several public and private organizations collect and provide a large amount of data on the socio-economic realities of different countries. Governmental Brazilian agencies are showing today clear interest to disseminate a range of different information to several user profiles. However, many limitations to a more massive and democratic dissemination persist, including heterogeneity of data sources, data dispersion and not friendly format of presentation. Due to the inherent complexity involved in the spatial information, which produces conflict on many levels, the exchange of data in geographic information systems is not a trivial problem. For Web-based applications, Web services can be a useful solution, since they enable new applications to interact with those that already exist and also enable compatibility among systems developed in different platforms. This study aims to show the possibilities of developing thematic portals using free software, Web services technology and the Open Geospatial Consortium standards for the dissemination of spatial data. To evaluate and test the proposal, a portal that integrates data from statistical information servers was built. As example, a thematic portal of socio-economic data was developed, integrating data from a local server and data from remote servers. The main contributions of work is the availability of dynamic maps, the generation of maps by the composition of maps available at local and remote servers and use the standard OGC WMC. The portal shows however that the location and application of Web services are not an easy task for typical Internet users. In this direction, future work could adopt the technology REST (Representational State Transfer).