NoiseMap five – Model Capacity
The limits on model size are essentially the practical ones of computer memory and processing speed – although the data input and processing techniques used by NoiseMap are designed to work efficiently with very large models. NoiseMap five can use multi-core processors and distributed processing which make the maximum use of available processing capacity.
The model size is normally limited to a geographical area of 1024 km square, although this can be increased simply by using a larger tile size. There are no limits on the numbers of any individual object types or the number of scenarios that can be managed.
The previous limit of 100 category types and 100 category combinations has been increased to 500 of each from version 5.2.6.
NoiseMap uses a rectangular Cartesian grid for the noise model. Each region of the globe uses its own ‘projection’ of the spheroidal surface of the earth onto the flat surface of the map. You can use any appropriate projection for your region. The UK Ordnance Survey uses a projection that ensures that the whole of the United Kingdom is mapped with positive co-ordinates, and given the size of the UK, the whole region can be contained by NoiseMap with no changes.
However, for other regions, you should choose a grid origin such that the furthest extent of the model is not more than 1024 km easterly or northerly from the chosen origin. You select the origin when you first create the database.
See this link for information on the Calculation speed of NoiseMap.
A full technical specification for NoiseMap five is available as a pdf file on the link below:
Enterprise Edition – Model Capacity
16,000 each of road, rail and haul road segments, noise barriers, fixed noise sources, ground contour points and receiver points. The model size is however unlimited in terms of geographical area covered.