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Convert DGN to GML Online - Free & Fast

Convert DGN files to GML online for free. High-quality conversion with no registration required.

GIS / Geospatial Converter

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.dgn,.DGN (max 100MB)

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About DGN and GML

DGN

DGN (MicroStation DGN drawings) - Bentley MicroStation CAD/GIS hybrid design file. Best for civil engineering, infrastructure mapping, transportation gis.

GML

GML (GML) - Geography Markup Language - OGC standard XML for geographic features and coordinate systems. Ideal for ogc-compliant geospatial data exchange, enterprise gis.

Format Comparison

CompressionLossy → Lossless
TransparencySupported
Use CaseConvert from civil engineering, infrastructure mapping, transportation gis to ogc-compliant geospatial data exchange, enterprise gis
File Size~Larger than Shapefile due to verbose XML structure after conversion

FAQs

Is converting DGN to GML free?

Yes, GoConvertFile offers free conversion of DGN to GML for files up to 100MB. No registration required.

How long does it take to convert DGN to GML?

Most DGN to GML conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.

What is GML best used for?

GML is ideal for ogc-compliant geospatial data exchange, enterprise gis. Geography Markup Language - OGC standard XML for geographic features and coordinate systems

Does converting DGN to GML lose quality?

No, converting DGN to GML does not cause additional quality loss — GML uses lossless compression. However, any artifacts already present in the original DGN file will persist in the GML output.

What file size should I expect after converting DGN to GML?

GML files are typically 2-5x larger than equivalent DGN files because GML preserves all pixel data. This is expected and necessary for lossless quality.

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What is DGN?

DGN (Design) is the native file format of Bentley Systems MicroStation, used for storing CAD drawings and GIS data in infrastructure projects such as roads, bridges, and utilities, supporting 2D and 3D design elements with level-based organization.

What is GML?

GML (Geography Markup Language) is the OGC standard XML grammar for encoding geographic features with full coordinate reference system support.

When Should You Use DGN vs GML?

Use DGN When...

Reach for DGN when your priority is civil engineering, infrastructure mapping, transportation gis — its efficient compression makes sharing fast and storage minimal.

Use GML When...

Reach for GML when your priority is ogc-compliant geospatial data exchange, enterprise gis — its uncompromising quality ensures every detail is preserved.

DGN vs GML: Key Differences

  • •DGN uses lossy compression while GML uses lossless compression — this is the fundamental technical difference between the two formats.
  • •Converting from DGN to GML changes compression type: lossless source becomes larger but with full quality preservation.
  • •How transparency is handled: GML supports transparency, so alpha information is preserved during conversion.
  • •File sizes: DGN files typically range 100KB to 1GB depending on design complexity and GML files Larger than Shapefile due to verbose XML structure.
  • •DGN is optimized for civil engineering, infrastructure mapping, transportation gis while GML is designed for ogc-compliant geospatial data exchange, enterprise gis — choose based on your specific workflow needs

Advantages of DGN

  • ✓DGN compresses data using lossy methods, keeping file sizes manageable for Civil engineering, infrastructure mapping, transportation GIS.
  • ✓Industry-wide support means DGN files open anywhere — from legacy systems to the latest devices.
  • ✓Small file sizes make DGN ideal for email, web uploads, and cloud storage.
  • ✓From professional software to open-source alternatives, DGN works out of the box.

Advantages of GML

  • ✓GML uses lossless compression tailored for OGC-compliant geospatial data exchange, enterprise GIS.
  • ✓GML is supported natively on virtually every device, browser, and operating system.
  • ✓GML files are bit-for-bit perfect, preserving every pixel and sample for professional work.
  • ✓GML integrates seamlessly with all major creative tools and workflows.

Common Use Cases for DGN to GML Conversion

Industry Applications

Best Practices for DGN to GML Conversion

  • →For DGN to GML: verify that field name length limits in GML do not truncate attribute column names
  • →Test a subset of features first — especially if the dataset contains mixed geometry types
  • →Confirm that multi-part geometries (multi-polygons, multi-lines) remain intact after conversion
  • →Check for any required sidecar files (.prj, .shx, .qpj) that the target format needs
  • →Validate the converted file using a GIS validation tool before relying on it in production

Troubleshooting DGN to GML Conversion

  • !GML features land in the wrong place after DGN to GML → verify the CRS/projection; mismatched coordinate systems shift geometry
  • !Attribute columns missing in GML → some GIS formats have field name length or type limits; rename or cast columns first
  • !DGN to GML drops the z/elevation dimension → pick a target format that supports 3D geometry
  • !GML file won't open in your GIS app → confirm the format version and any required sidecar files (e.g. .prj, .shx) are present

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KML → GML
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GEOJSON → GML
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TOPOJSON → GML
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WKT → GML
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All GIS / Geospatial Formats

SHPGPXKMLGEOJSONTOPOJSONWKTGPKGMIFTABE00DGNGDBBNAMID
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