This article considers the issue of the Geographic Information Retrieval (GIR) suggesting the development of techniques for disambiguation of toponyms based on ontologies to address the ambiguity in GIR queries. In particular, mixed domain ontology was built to way of organizing the Spanish-speaking countries, in order to develop a disambiguator method of place names in Spanish. The proposed method is based on geographic proximity between toponyms in the same context, using hierarchical relationships provided by the ontology and an ontological hierarchical weighting, which is complemented by the Haversine distance.