Convert SHP to GML

Understanding SHP and GML file formats

SHP (Shapefile) is a popular geospatial vector data format developed by Esri for geographic information system (GIS) software. It stores geometric location and attribute information of geographic features such as points, lines, and polygons. A shapefile is actually a set of files with the same base name but different extensions, the most important being .shp, .shx, and .dbf.

GML (Geography Markup Language) is an XML-based encoding standard for geographic information developed by the Open Geospatial Consortium (OGC). GML is used for expressing geographical features and their properties in a platform-independent way, making it suitable for data sharing and interoperability between different GIS systems.

Why convert SHP to GML?

Converting SHP to GML is often necessary when you need to share geospatial data across different platforms or with web-based GIS applications that require open, XML-based formats. GML is widely used for data exchange in web services and supports complex data structures and metadata.

How to convert SHP to GML

The conversion process involves transforming the vector data and its attributes from the binary shapefile format into the XML-based GML format. This can be done using specialized GIS software or online converters.

Best software for SHP to GML conversion

• QGIS: A free and open-source GIS application that supports both SHP and GML formats. To convert, open your shapefile in QGIS, then use Layer → Export → Save Features As... and select GML as the output format.
• GDAL/OGR: A powerful command-line tool for geospatial data conversion. Use the ogr2ogr utility with the following command:
  ogr2ogr -f "GML" output.gml input.shp
• FME: A commercial data integration platform that supports advanced conversion and transformation between SHP and GML, suitable for enterprise workflows.
• Online converters: Websites like MyGeodata Converter or Mapshaper allow you to upload a shapefile and download the converted GML file directly.

Tips for successful conversion

• Ensure all shapefile components (.shp, .shx, .dbf) are present before conversion.
• Check the coordinate reference system (CRS) and specify it during export if needed.
• Validate the resulting GML file using XML or GML validation tools to ensure compatibility.