Release Note v2-0

Snowflake OS MasterMap Viewer

Summary of change

Support for all OS MasterMap layers delivered in GML including: Topo, ITN, ITN2 and Address. Support for non spatial features. Build Topology button now builds features references as well as topology. Improved memory preformance.

Bug Fixes since Release v1-1

• Fixed memory leak when running with Java 1.4

Enhancements since Release v1-1

• Support for ITN, ITN2 and Address
• Support for non spatial features
• Reference building for references to spatial and non spatial features
• Reference ‘hopping' in the attribute browser
• Complex Attributes named using XPATH notation
• Lower memory overhead and light load option removed
• Improved layer management for display and selection
• Integration with Java v1.4
• New standalone installer
• New look and feel

Known Issues

• Some users are finding it difficult to view very dense urban areas of OS MasterMap ordered in 5X5km chunks (urban 5x5km OS MasterMap chunks can contain over 1 million features). Snowflake's OS MasterMap Viewer uses a memory model to store all loaded features, therefore, performance and load capacity is very much dependent on the amount of memory available. Apart from buying more memory, you can increase capacity by increasing your operating system swap file space (see the FAQ on how to do this). As always to free up more memory try closing other applications. The more free memory you have the more data you can view.