Import / Export¶

TunnelCAD supports multiple file formats for exchanging project data with other software and for archiving tunnel monitoring records.

Supported formats¶

Native format – .tun: TunnelCAD’s own XML-based project format (IQML). Stores the complete project state including alignments, sections, templates, volumes, styles, and settings. See TUN File Format Reference for the schema reference.
LandXML 1.2 / 2.0: Industry-standard XML format for civil engineering and survey data. TunnelCAD can both import and export LandXML files, with optional TunnelCAD-specific extensions encoded as <Feature> elements. See LandXML Import and Export.
ASCII measurements: Per-section line points exchanged as comma- or whitespace-delimited text files (XYZ, station/offset/Z, or station/offset/dZ). Both directions are supported through the same column-mapping engine. See Measurement Import and Export.
Legacy TCM: The file format used by earlier versions of TunnelCAD. A one-way conversion tool reads .tcm files and produces .tun projects. See Legacy TCM Conversion.
DXF templates: Cross-section design profiles can be imported from DXF files. This workflow is covered in the Templates chapter.

Mass tables: Volume and area computation results can be exported to CSV or XLSX spreadsheet files from the mass table dialog.
Analytics reports: The analytics module exports clearance reports and deviation data to DXF drawings and XLSX spreadsheets.

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