Noise maps are produced by repeating the same calculation as for receiver points at points that are distributed on a regular grid. For each grid point the Level day and night (or L_den an L_n) and the ground height is saved. The maps are presented with colours that can be chosen from a palette - different palette files can be saved and loaded.
 

Grids can be saved, recalculated using the existing level and any arithmetic expression, subtracted and merged.

The coloured areas can be exported to Arc View and the lines of equal sound level to any application as DXF-file. The WebExport-feature of CadnaA produces exactly all the bitmap-files that are necessary to get an interactive Internetpresentation with level information.

If a noise map has been calculated and the 3D-Special view is selected, CadnaA shows a photorealistic 3D-view with the ground in colours of the noise map. The following picture shows a hilly region with the ground surface coloured by the calculated noise map.

Noise mapping with CadnaA
Strategic noise mapping with Option XL
Presentation of results using horizontal noise maps
Calculation of noise levels at predefined receiver positions
Calculation of noise levels on grids enveloping building facades
Grid arithmetics feature
Web-Export feature to create interactive web presentations
Examples for internet presentations of noise maps for cities and regions