Along with the occurrence and continuous development of semantic sensor network, more and more sensor data is released on network in the format of RDF. However, SSN ontology is lack of conceptual description about locations. The location information in SSN ontology is only a textual word which is weak at describing location information of sensors. The issue makes sensor data be used inconveniently. In order to solve the issue, we propose a method to strengthen the ability of geographical description of SSN ontology by GeoNames. The method can enrich the geographical information of sensor data. Moreover, users can query sensor data based on geographical information, such as alternate names, coordinates. Additionally, we also design a prototype to help users more conveniently complete the work of querying and using the sensor data.
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