Wolfram Language Paclet Repository
Community-contributed installable additions to the Wolfram Language
MalcolmWoodruff`LineTerra`
LTExportPlanDXF  |
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Coordinates are written in real-world metres: one drawing unit is one metre, so measuring in a CAD package gives the true dimension directly. There is no drawing scale to set, unlike the PDF section export.
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No TEXT entities are ever written. Import[..., "DXF"] fails the entire file with $Failed the moment it meets a bare TEXT entity, even one sitting alongside valid geometry, and re-opening an exported DXF in the Wolfram Language is a normal workflow here.
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Geometry is identified by layer instead: ALIGNMENT, CONTOURS, CHAINAGE_TICKS and SCALE_BAR.
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CHAINAGE_TICKS carries short marks crossing the alignment perpendicular to its direction of travel, at a round interval auto-chosen for roughly 8 to 20 ticks along the whole alignment, with a taller tick every fifth one.
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SCALE_BAR is a single reference line of an exact, round real-world length with end ticks, placed clear of the drawing, so measuring it is an unambiguous check on scale.
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The file declares itself as DXF R12, AC1009, and uses the POLYLINE/VERTEX/SEQEND entity chain rather than LWPOLYLINE. This is deliberate: LWPOLYLINE needs at least R14, and a file declaring a modern version such as AC1015 is expected by strict ODA-based readers, which is what Vectorworks and many other packages use, to also carry entity handles, a BLOCK_RECORD table and populated BLOCKS and OBJECTS sections. R12 has no such requirements, making it the most broadly compatible variant available.
Examples
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