GML Converter — Convert GML Files Online Free
GML (Geography Markup Language) is the OGC standard for encoding geographic features as XML, required for INSPIRE-compliant datasets and WFS (Web Feature Service) responses. Maparz converts GML to GeoJSON and Shapefile for analysis, and converts GIS data to GML for government portals and WFS publishing.
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About GML format
Geography Markup Language (GML) is an XML-based OGC standard for encoding geographic features. It is the mandatory format for the EU INSPIRE directive and is commonly used in Web Feature Services (WFS) to deliver geospatial data over the web. GML files are highly interoperable across GIS platforms and are natively supported by GDAL, QGIS, ArcGIS, and GeoServer. GML can represent complex geometries, coordinate reference systems, and rich attribute schemas, making it the format of choice for authoritative government and infrastructure datasets.
Strengths
- +OGC standard — maximum interoperability
- +Mandatory for EU INSPIRE datasets
- +Supports complex geometries and CRS metadata
- +Native support in QGIS, ArcGIS, and GeoServer
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Frequently asked questions
Q.What GML versions are supported?
GDAL supports GML 2 and GML 3, covering the vast majority of GML files in practice. INSPIRE-specific application schemas may require additional configuration beyond online conversion.
Q.Why does my GML file fail to convert?
Complex GML with custom application schemas or missing .xsd schema files may fail. Try opening the file in QGIS first to verify it is valid GML, or use a simpler GML profile.
Q.Can I convert GML to GeoJSON for web mapping?
Yes. Converting GML to GeoJSON is one of the most common use cases. The result loads directly into Leaflet, Mapbox GL JS, or MapLibre.