The ILOC method for on-the-fly location referencing, which has been extensively described elsewhere concentrated originally on the Intersection Location. Tests that were carried out in the Evidence project were promising, but also showed that the method needs improvement before it can be successfully implemented in the full service chain. Such improvement could be realised, it was thought, by adaptations in three domains: details of the software implementation, introduction of location types, and the coding of road section locations rather than intersection locations. This paper proposes in some detail a more specific approach for the coding of road sections, using the GDF (geographical data files) attribute for road classification (functional class) and the GDF defined complex feature coding of complex intersections and multi-carriageway roads. First tests on the NAVTECH database look promising. A decisive test should be carried out between two or more different map databases of GDF based specification.
Samenvatting