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Third-Party Software

Note

The recommended format for exchange of data among different software packages for outdoor noise propagation is the so-called QSI-format specified in DIN 45687 /33/(see Special Formats).

LimA files

With this format, files from the software LimA by the company „Ingenieurgesellschaft Stapelfeldt“, Germany, are imported.

The files can have different file extensions like, e.g., „ert“, „hge“, „ind“, „spo“, „nut“ etc. and therefore cannot be used as a file filter for choosing the files in the import dialog.

Several files can be imported at once by using multiple selection of files.

Options

When this option "Unknown Attributes to Memo-Variables“ is activated (default setting) all LimA attributes are copied to the memo window of each object (see also Unknown Attributes to Memo-Variable).

The attribute values can be copied as usual attachments to the CadnaA attributes (see Modify Attribute in the manual "Introduction to CadnaA"). In order to move just the numerical value, select the option „Arithmetic“ on dialog Modify Attribute.

SoundPlan files

With this format, files from the program SoundPlan by the company „Braunstein & Berndt“ are imported.

These files have no consistent extension and therefore cannot be used as a file filter in the import dialog. All kind of files can be imported simultaneously by multiple selection. The ground heights are also imported from SoundPlan files (Geometry dialog, option „absolute Height/Ground at every point“).

CadnaA imports SoundPlan receiver points as follows:

  • If SoundPlan receiver points are assigned to „Reflex files“, the option „Use next building“ will be activated in CadnaA automatically. This affects the searching for buildings within 1,5 meters of the receiver point and assigns it the ground height of the next building facade.
  • If no building is found, the terrain model is evaluated.

If the receiver points aren’t assigned to any „Reflex files“, the control line IHM will be appraised: The base at the receiver point will then be IHM under the Z-height (therefore the option „Input of Value“ will be activated automatically). In case the IHM is not specified the standard of 2,8 m will be applied.