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.gml

GML Viewer

Understand GML, its role in standards-driven geospatial exchange, and why teams often convert it into lighter GIS formats for day-to-day work.

Upload .gml files to visualize OGC GML features.
All processing runs locally in your browser.

GML

Upload .gml files to visualize OGC GML features.

How to open GML online

View Geography Markup Language (GML) files. Upload .gml files to visualize OGC GML features.

Privacy

Files are processed on your device in the browser. GeoDataViewer does not upload your datasets to a server for viewing.

Common issues

If a dataset uses multiple required sidecar files, make sure you provide the complete set together. For best results, keep all sidecars in one zip archive when applicable.

Related tools

Measure distances, areas, elevation, and radius circles using the tools menu, then come back to inspect your GML layer on the map.

What is GML?

GML is an OGC XML-based geospatial encoding used in standards-heavy exchange workflows where formal schemas and structured feature descriptions matter.

GML is designed for rigorous geospatial data exchange, especially in environments that value application schemas, XML tooling, and well-defined standards behavior.
That rigor makes GML powerful for formal interchange, but it also makes the format heavier and more verbose than many teams want for routine viewing, editing, or browser distribution.

What is GML used for?

  • Standards-driven exchange between government, enterprise, and regulated geospatial systems.
  • Workflows that depend on XML schemas and explicit feature structure.
  • Delivering complex datasets where formal interoperability matters more than lightweight handling.

Common use cases

  • National mapping, cadastral, infrastructure, and regulated data handoff workflows.
  • Data exchange packages tied to OGC-oriented services or schema contracts.
  • Converting formal XML geospatial exports into more practical working files for analysts.

Strengths

  • Strong fit for standards-oriented and schema-driven exchange.
  • XML structure can represent rich feature content in formal workflows.
  • Widely recognized in OGC-aligned environments.

Limitations

  • Verbose XML makes files heavier and harder to inspect manually than simpler formats.
  • Many day-to-day GIS users prefer lighter formats for editing and quick review.
  • Browser and consumer tooling usually need conversion before the data is practical to use.

File extensions and sidecar files

.gml
Main XML file containing geospatial features and schema-driven structure.
.xml
Generic XML extension sometimes used for GML-based content in broader data exchange systems.
XSD schema references
Supporting schema definitions may accompany GML workflows to formalize feature structure and validation.

Convert GML online

GML to CSV
Open, preview, and convert GML locally in your browser.
GML to AutoCAD DXF
Open, preview, and convert GML locally in your browser.
GML to FlatGeobuf
Open, preview, and convert GML locally in your browser.
GML to File Geodatabase
Open, preview, and convert GML locally in your browser.
GML to GeoJSON
Open, preview, and convert GML locally in your browser.
GML to GeoRSS
Open, preview, and convert GML locally in your browser.
GML to GeoPackage
Open, preview, and convert GML locally in your browser.
GML to GPX
Open, preview, and convert GML locally in your browser.
GML to JSON-FG
Open, preview, and convert GML locally in your browser.
GML to KML
Open, preview, and convert GML locally in your browser.
GML to MapInfo
Open, preview, and convert GML locally in your browser.
GML to MBTiles
Open, preview, and convert GML locally in your browser.

GML Viewer FAQ

Why is GML still used if it is so verbose?

It remains useful in standards-driven environments where formal schemas, XML tooling, and explicit interoperability rules are more important than file compactness.

When should I convert GML to another format?

Convert it when the next step is web mapping, exploratory analysis, or desktop editing that does not benefit from XML-heavy structure.

Is GML a good web map delivery format?

Not usually. Teams typically convert GML into GeoJSON, GeoPackage, or tiles before using it in modern browser workflows.