A conversion and management system for parcel maps

In this paper, a new system for parcel map conversion and management is proposed. A scanner was used to input paper source maps into a computer. Text is separated from graphics by finding a connected component. Thinning and tracing are then executed by utilizing run-length codes for straight line extraction. A program is found if a closed loop is detected. All the extracted objects are stored into a spatial database. Attribute data such as land number, land use label, and land owner are saved into an attribute database. Topology representing the relations among objects is also generated and saved into the attribute database. We can query attribute data by spatial data and vice versa. A3 size parcel maps and Taipei administrative map are tested. The experimental results show that the proposed system is very effective and friendly