Real-Time Data Generalisation and Integration using Java
Lars Harrie, Mikael Johansson · DOAJ (DOAJ: Directory of Open Access Journals) · 2013
Today, most of the cartographic data that are distributed via the Internet and to mobile devices are raster data, but the emerging XML standards will make it easier to distribute vector data. The use of vector data has two basic advantages. Firstly, a map stored in vector format generally requires less storage space than a map stored as raster data. This also means that transmission times are shorter for vector data. Secondly, it is easier to integrate and generalise vector data than raster data. These integration and generalisation operations are important when creating the map components of user-friendly services. This paper describes methods for manipulating cartographic vector data for creating real-time maps. It focuses particularly on a technical environment for integrating and generalising vector data. The paper starts with a description of the system architecture for distributing cartographic data from a database to an end user. This is followed by a description of a Java program for manipulating the vector data and a case study of this program. The paper concludes with a discussion