Convert GML to DXF Online — Free GIS Converter

GML datasets from government portals are a valuable source of authoritative base geometry — cadastral parcels, road alignments, utility corridors, and building footprints — and converting them to DXF brings that geometry directly into AutoCAD, Civil 3D, and MicroStation for engineering and design work.

Why convert GML to DXF?

Government and municipal portals publish cadastral data, infrastructure networks, zoning boundaries, and topographic features in GML via WFS services and INSPIRE data downloads. Engineers and surveyors frequently need this authoritative geometry as a base layer in their CAD drawings — for site planning, road design, utility routing, or building permit submissions. DXF is the universal CAD interchange format accepted by AutoCAD, Civil 3D, MicroStation, and virtually every other engineering CAD application. Converting GML to DXF eliminates the need to manually digitize or re-survey base geometry that already exists in authoritative government datasets, saving significant time and reducing the risk of transcription errors.

Why use geodata.plus

• Free tier includes 3 conversions per month with no account required
• Automatic CRS detection from GML srsName — reprojects to your chosen local CRS before DXF export
• Reprojection to a local projected CRS (UTM, national grid, state plane) is essential for correct CAD coordinates
• Entirely browser-based — no AutoCAD, QGIS, or GDAL installation needed
• Encrypted upload (TLS); files stored in Cloudflare R2, automatically deleted after 2 days (free) or 7 days (Pro)
• GML feature type names are mapped to DXF layer names for organized CAD layer structure

How it works

1. Upload your .gml file to geodata.plus
2. geodata.plus reads the GML schema and detects the source CRS from the srsName attribute
3. Select DXF as the output format; choose a projected local CRS (UTM zone, national grid, etc.) so CAD coordinates are in meters or feet
4. Download your .dxf file and open it in AutoCAD, Civil 3D, or MicroStation

GML format

GML (Geography Markup Language) is the OGC XML standard used by WFS services and INSPIRE portals for formal geographic data exchange. GML supports any CRS, all geometry types, and complex nested attribute structures defined in XSD schemas. National GML datasets typically use the country's standard CRS — for example, ETRS89-TM35FIN in Finland, Amersfoort / RD New in the Netherlands, or OSGB 1936 / British National Grid in the UK. These projected CRS values in meters make the geometry directly usable in engineering CAD after conversion, unlike WGS 84 decimal degrees which are impractical for CAD work.

| Property | Value | |---|---| | Extension | .gml | | Type | Vector, single-file XML | | Coordinate system | Any CRS (declared via srsName) | | Geometry types | Point, LineString, Polygon, Multi- variants, complex curves/surfaces | | Common software | QGIS, ArcGIS, WFS services, EU INSPIRE portals, government systems |

DXF format

DXF (Drawing Exchange Format) is Autodesk's open CAD interchange format, supported by all major CAD applications. DXF stores geometry as X, Y (and optionally Z) coordinate values in a unit system defined by the drawing — typically meters or feet in engineering applications. DXF has no CRS definition mechanism, so the coordinate system is implied by the values: a DXF exported from a projected national grid CRS in meters will align correctly with other CAD data in that same system. DXF organizes entities on named layers and supports polylines, points, arcs, blocks, text annotations, and many other CAD entity types essential for engineering drafting.

| Property | Value | |---|---| | Extension | .dxf | | Type | Vector, single-file | | Coordinate system | None (assumes project/local coordinates) | | Geometry types | Polylines, Points, Blocks, Text, and other CAD entities | | Common software | AutoCAD, Civil 3D, MicroStation, surveying and engineering tools |

Frequently asked questions

My GML source uses ETRS89-LAEA (EPSG:3035) with coordinates in the millions. Will those work correctly in AutoCAD? ETRS89-LAEA uses large easting/northing values (typically 2,000,000+ meters). AutoCAD can handle these numerically, but many CAD workflows prefer to work in a local coordinate system near the origin to avoid precision issues at large coordinates. We recommend selecting a more local projected CRS — such as a national UTM zone — as your target during conversion, or establishing a project base point in Civil 3D to shift the coordinates into a convenient local range.

GML polygon features like cadastral parcels have complex boundaries. Will they convert to closed polylines in DXF? Yes. GML polygon exterior rings are converted to closed DXF LWPOLYLINE (lightweight polyline) entities. Interior rings (holes) are represented as separate closed polylines on a distinct layer so that the full topology of the original cadastral boundary is represented in the CAD drawing, even though DXF does not natively model polygon-with-holes as a single entity.

Which GML attributes are carried into the DXF file? DXF does not have a native attribute table. geodata.plus attaches GML feature attributes as DXF XDATA (extended entity data) on each entity, and also places key attribute values as TEXT entities near the geometry. In AutoCAD, you can access the XDATA through the LIST command or via the ATTRIB field mechanism. If you need the full attribute table, consider converting to GeoPackage or Shapefile alongside the DXF.