Construction method of geomorphologic classification knowledge base based on ontology

In order to solve the existent problem of complexity of classification standard and inconstancy of combining geomorphologic factors in geomorphologic classification system, a Geomor-Onto(geomorphology ontology) is built up to describe complicated geomorphy classification problem. With the formal analysis to the semanteme of geomorphic conception, this paper proposes a logic structure of Geomor-Onto and establishes a ontology model. After analyzing the type and source of geomorphic classification knowledge, we built a GCKB (Geomorphologic Classification Knowledge Base), which includes factual base, rule base and image database. In the end, a test is performed by using knowledge acquired form the GCKB and DEM dataset of China, and the results testify the value of this technique.