Extract text from Geography markup files (GML)
To convert GML Markup files to another format, you need FME Desktop or other GIS software.
To convert other file formats to the "Data Exchange Format" file type, you need software like FME Desktop or a similar tool.
The .GML file extension primarily denotes a Geography Markup Language file. This is an XML-based encoding standard developed by the Open Geospatial Consortium (OGC) to express geographical features such as points, lines, and polygons, alongside their associated attribute data. A secondary, but notable use of the .GML extension is for Graph Modelling Language files, which are plain-text formats used to map node-and-edge network graphs in software like Gephi.
While highly structured and widely recognized by enterprise GIS platforms like FME Desktop and ArcGIS, .GML files suffer from severe practical disadvantages. Because they rely on verbose XML tagging, file sizes bloat rapidly. A simple map can easily exceed 100MB, rendering the file impossible to open in standard text editors without crashing the system. Furthermore, .GML is not natively supported by web browsers, and opening it requires expensive, heavy desktop GIS software.
To make this data usable, conversion is necessary. For web mapping and fast rendering, convert .GML to GEOJSON or .TOPOJSON. For compatibility with Google Earth, convert to KML. If you only need the tabular attribute data without the geometry, extract it to a CSV file.
Convert.Guru analyzes your GML file, detects the exact format, and lets you read the text inside.
Users also converted GLM, ZIP, XML, YY, GMI, XSD, SIG, TXT, GRAPHML, PDF, PNG, DWG and GFS files.
If you want to convert GML file to KML, GEOJSON, DWG, CSV, PDF, JSON, OBJ, SHP, KMZ, GPX, TOPOJSON or TIF, you can use FME Desktop or similar software from the "Geospatial Data Transfer" category. In the File menu, look for Save As… or Export….
To convert LAZ, KMZ, DTM, CSV, DEM, PRJ, LAS, GPX, DSM, SHP, DBF or KML files to GML, try FME Desktop or another comparable tool in the "Geospatial Data Transfer" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our GML converter.