Oasis Master Manger is a stand-alone windows product which translates OS MasterMap files into Microstation design files. The OS MasterMap file format is an implementation of XML called GML. OS MasterMap is the new digital format from Ordnance Survey GB. It is derived from the Digital National Framework and is will eventually replace the existing Land-Line family of products.
The OS MasterMap format has improved on other land-line formats in various ways. The data is clean: all polygons are closed, there are no crossing lines or gaps, and the accuracy has improved. The data contains complete polygons of builds, fields, etc, and can be filled and be represented more clearly. There are currently 2 types of OS MasterMap data: Independant Polygons Dependant Polygopns