Semantic technologies are a new and emerging area. Semantics, ontologies, and the Semantic Web are just starting to be practiced by the spatial and the computer science communities. Geospatial applications needing semantics are still being identified for problems such as references to location, geographic scale, locational analysis, spatial data user interface, and many more. The design and development of tools to meet application needs are active and challenging research areas. Although the medical and life sciences formed the early domains to promote and use semantic technologies, there is now strong interest in researching what is needed in the spatial and geospatial domains. The purpose of this workshop is to promote research regarding semantics as it pertains to the spatial domain.