This work describes the study and desing on the creation of ontology. The study of the problems related with this creation and a particular case which we development an ontology for spatial terms (in geospatial context) which will be used for solving semantic problems derived of Schema Integration on Federated Spatial DataBases. We explain how to generate this ontology from other existent ontologies like Spatial Data Transfer Standard (SDTS) and WordNet. We need to do classify classes's distinguishing features in: parts, attributes and functions for have more details about classes In this work we extract classes from SDTS, as well as will be defined in the ontology, also we extract parcial definition definition of Is-a relations and attributes which will be defined into our ontology. We complement by means of Part- Whole relation of WordNet we complement the Is-a relations of SDTS. As well as part elemets are taken from WordNet, functions are obtained from explicit verbs used in classes descriptions and this is incrised by common sense. Finally using Cyc we have created one microtheory to store this new ontology