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Abstract
Facilitating Online Geospatial Data Access Using GML and Web Services
Pouria Amirian
K.N.Toosi, University of Technology,
Iran
Email: p_amirian@hotmail.com
Ali Mansurian
K.N.Toosi
University of Technology
K.N.Toosi
University of Technology
Email: mansourian@kntu.ac.ir
The tremendous development of World Wide Web has resulted in demand for online access to geospatial data. In this context, currently geospatial data warehouses enable GIS users to access diverse geospatial datasets from various resources. In spite of the mentioned fact, these systems suffer from number of shortcomings. The most important shortcoming of the geospatial data warehouses is the fact that online access to geospatial data via these systems is restricted to the inline geospatial data. This means that, these systems do not provide the ability to integrate geospatial data from various sources remotely. In this context two sources for this shortcoming can be identified; first these systems don’t offer their own geospatial data in an open and standard format and second, even if these systems offer their own geospatial data in open and standard format, there must be an efficient infrastructure to allow them to communicate directly. In other words, different geospatial warehouses which are running on various platforms should be able to communicate with each other in open and vendor neutral way. By building on broader Internet standards from the World Wide Web Consortium (W3C), the GIS community has developed an XML-based markup language, known as GML, for modeling, transporting and storing geospatial data. GML is used to express geospatial information in a manner that can be readily published on the Internet. For fully access to geospatial data in a distributed environment openly and in cross platform manner, coupling geospatial data which are encoded in GML with Web services technologies seems to be an efficient solution. Since Web services are the foundation of new type of interaction- that is interoperable and open application to application communication- they provide an unprecedented opportunity to overcome the mentioned shortcoming of online geospatial data access.This paper intends to tackle the mentioned problems associated with online access to geospatial data. For this aim a framework for online access to geospatial data using GML and Web services technologies will be proposed.
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