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QSI

The QSI file format according to DIN 45687, annex D 45687-2006, is intended for data exchange between different software package used for the calculation of sound propagation. The data is written to a QSI project file (file extension QSI, for „Quality Assurance for Software-Products for the Calculation of Immission“) and to several QSI files containing object data the format of which corresponds with ArcView-shape-files (file extensions SHP, DBF, SHX).

When exporting data the QSI-project file (<filename>.qsi) all corresponding SHP-, DBF- and SHX-files (###) are saved automatically.

QSI specific sound sources

The QSI-format includes the following sound sources:

  • point source (<filename>_SRCP.###)
  • line source (<filename>_SRCL.###)
  • area source (<filename>_SRCA.###)
  • road (<filename>_ROAD.###)
  • railway (<filename>_RAIL.###)
  • parking lot (<filename>_PARK.###)

Note

Vertical area sources are not part of the QSI format and are, therefore, not exported.

Other QSI specific objects

Further elements included in the QSI-format are:

  • receiver point (<filename>_RECV.###)
  • crossing/red light (<filename>_CROS.###)
  • building (<filename>_BLDG.###)
  • barrier (<filename>_BARR.###)
  • contour line (<filename>_HLIN.###)
  • height point (<filename>_HGPT.###)
  • ground absorption (<filename>_GABS.###)
  • attenuation area (<filename>_AREA.###)
  • train classes (<filename>_TRCL.DBF)
  • spectra (<filename>_SPEC.DBF)
  • diurnal pattern (<filename>_DIPA.DBF)

PWL correction & Operating Times

A specified PWL correction D/E/N and operating times D/E/N with point, line and area sources will be exported using QSI export as diurnal patterns to the file <filename>_DIPA.DBF.

Built-Up Areas & Foliage

The object types „Built-Up Area“ and „Foliage“, both, will be exported as attenuation areas to the file <filename>_AREA.###.

CadnaA specific elements for QSI

Furthermore, the CadnaA specific element „Directivity“ is considered when exporting to QSI format (<filename>DRCT.DBF).