Recently spatial reasoning has gradually become a research hotspot in some domains such as GIS and spatiotemporal database. At present many spatio-temporal methods put forward by scholars are methods based on logic or algebra by and large, and researches on formalization representation and reasoning of geographic sptatio-temporal knowledge are few. Geo-ontology researches detailed connotations and hierarchy relationships of concepts of geographic spatial information in the geoinformatics domain and offers semantic annotations of concepts. Semantic and spatio-temporal relationships can fuse into geo-ontology and form knowledge base of geo-ontology. But OWL, an ontology representation language, can't describe determining and reasoning rules of spatio-temporal relationships owing on account of its limitation. At the same time SWRL can make up the deficiency of OWL, which implements the combination of Horn-like rules and OWL knowledge base by adopting highly abstract syntax to express knowledge represented by OWL ontology. This paper does a research on adopting geo-ontology to represent semantic and spatiotemporal relationships and applying SWRL to express spatio-temporal rules, which lays the solid foundation of spatio-temporal reasoning.

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This paper brings forth building spatio-temporal reasoning architecture and spatio-temporal query system based on adopting geo-ontology to represent spatio-temporal information knowledge and employing SWRL rules to express spatio-temporal reasoning rules. When carrying through spatiotemporal reasoning this paper adopts Jess to be a reasoner, which is the core of the whole architecture. Before carrying through reasoning this paper transforms geo-ontology and SWRL rules into fact base and rule base of Jess. After carrying through reasoning this paper uses obtained new facts to update original geo-ontology. In spatio-temporal query system this paper adopts input interface employing geo-ontology to conduct query requirement, and divides spatio-temporal query into three levels such as ordinary spatio-temporal query, simple spatio-temporal query based on semantics and complicated spatio-temporal query based on semantics.Under the background of experiment system of digital tobacco 3S, this paper develops spatio-temporal query architecture of agricultural geographic information based on geo-ontology and SWRL spatio-temporal reasoning rules. Through comparing and analyzing experiment result, this paper points out that spatio-temporal reasoning and spatio-temporal query based on geo-ontology and SWRL rules are future development orientation of spatio-temporal query of agricultural geographical information. The experiment case can provide powerful support for decision-making and management of planting tobacco.