Purpose and Utility
GML (Geography Markup Language) is an XML-based format designed for the transport and storage of geographic information. Export GML from CAD in SPCAD allows seamless data integration with GIS platforms, web-based geospatial services, and national or regional cadastral systems that follow OGC standards.
This tool enables users to convert standard CAD geometries (like lines, polylines, and polygons) into GML format with correct geospatial referencing, ensuring compatibility with authoritative mapping agencies, spatial databases, or enterprise GIS systems.
Technical Description
- Coordinate System:
You must assign a valid projected coordinate system before export to ensure geospatial accuracy. - Object Selection:
The tool prompts users to select the objects they want to export — be it boundaries, structures, or other mapped features. - Export Output:
Once users select the objects, they choose an output folder, and SPCAD generates a GML file that includes the geometry, attributes (if available), and spatial reference data. - GML Schema:
The output adheres to GML encoding rules suitable for import into GIS tools such as QGIS, ArcGIS, and GeoServer. It preserves geometry type, coordinate values, and projection metadata.
Workflow
- Assign a projected coordinate system to your drawing
- Launch the tool from Export → Export to GML or use the command OGML_SP
- Select the objects to export
- Specify the output folder and confirm the file name
- GML file is created and saved with all selected geometries georeferenced
Use Case Highlights
- Share drawing content with GIS teams or survey authorities
- Submit standardized data to spatial databases
- Ensure interoperability between CAD and GIS environments
- Perfect for exporting utility networks, road layouts, or mapped boundaries