Validate and parse LandXML survey/civil design files against the official schema
domain: landxml.org · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Download the LandXML 1.2 schema (landxml-1.2.xsd) from landxml.org's schema page
Validate a candidate .xml file against the schema using a standard XML validator (e.g., xmllint --schema landxml-1.2.xsd file.xml)
Consult the LandXML-1.2 documentation for the element you need (e.g., Survey, CgPoints, Surfaces, Alignments) to understand required attributes and units
Extract survey data with XPath/XML tooling — e.g., CgPoints for control points, Surfaces for terrain/grading models, Alignments for road/rail centerlines
Convert extracted geometry into your target format (e.g., a PDAL-compatible input or a GIS format) using general-purpose XML/GIS tooling, since LandXML itself defines no conversion API
Known gotchas
LandXML 1.2 (2008) is still the last official release; a 2.0 working draft from 2014 was never finalized — don't build against 2.0-only elements expecting broad tool support
Producer software (survey/CAD packages) often emits vendor-specific extensions or omits optional elements — schema-valid files can still lack fields your workflow needs
There is no hosted LandXML API/service — this is a file-format/schema standard, so integration means parsing/validating local files, not calling a remote endpoint
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