Research on Design of Spatial ETL Rules Based on Metadata
Spatial data warehouse is proposed to facilitate online spatial data analysis. The spatial data extraction, transformation and loading represent one of the most critical success factors for spatial data warehouse project. By using metadata to control and manage the spatial ETL processes, we could increase the flexibility and extensibility of the spatial ETL tools. Introduces a new way of realizing spatial ETL with the help of metadata and discusses the method of designing the rules for transforming the spatial data from the source databases to the target spatial data warehouse.