A kind of formal system, which can express clearly a certain entity or information, is needed to express geographical
concept. Besides, some rules explaining the interrelationship and action between different components are also required.
Therefore, the conception of geo-object ontology is introduced. It is a shared formalization and display specification of
conceptual knowledge system in the field of concrete application of spatial information science. It can constitute
hierarchy structure, which derives from the concept classification system in the geographical area. Its concepts can be
described by the property. Property sets can form a vector space with multi-dimensional characteristics. Geographic
space is composed of different types of geographic entities. And its concept is formed by a series of geographic entities
with the same properties and actions. Moreover, each of the geographic entities can be mapped to an object, and each
object has its spatial property, time information and topology, semantic relationships associated with other objects. The
biggest difference between ecumenical information ontology and geo-ontology is that the latter has the spatial
characteristics. During the construction process of geo-object ontology, some important components, such as geographic
type, spatial relation, spatial entity type and coordinates, time, should be included to make further research. Here, taking
disaster as an example, by using Protégé and OWL, combined methods used by constructing the geo-object ontology in
the form of being manual made by domanial experts and semi-automatic are investigated oriented to disaster to serve
ultimately geographic information retrieval service driven by ontology.