aviconv-aixm 0.4.1

Bidirectional AIXM 5.1.1 dataset reader/writer with GeoJSON, AIRAC diff, and temporality flattener.

aviconv-aixm

Bidirectional AIXM 5.1.1 reader/writer for full AIP datasets, plus GeoJSON export, AIRAC-cycle diff, and a temporality flattener that materialises a snapshot at any date T.

Part of the aviconv monorepo.

Install

pip install aviconv-aixm

This pulls in aviconv-core (shared XML / coords / errors) and brings the aviconv aixm … subcommands under the umbrella aviconv CLI.

Status

• v0.4.0 covers the AIP feature core: AirportHeliport, Runway, RunwayDirection, Navaid (VOR/DME/NDB/ILS/TACAN), DesignatedPoint, Airspace + AirspaceVolume, Route + RouteSegment, Procedure (envelope), Obstacle, Organisation, Unit.
• TaxiwayElement, ApronElement, full Procedure leg algebra, and the ADR-23.5.0 extension surface are deferred to 0.4.x.
• Streaming reader (constant memory on 100MB+ datasets) via lxml.iterparse. Writer streams via lxml.etree.xmlfile.

Library

from aviconv_aixm import (
    read_aixm, read_aixm_dataset,
    write_aixm,
    to_geojson,
    diff_datasets,
    snapshot_at,
)

# Stream features one at a time (constant memory on 100MB+ inputs)
for feature in read_aixm("aip.xml"):
    print(feature.gml_identifier.value, type(feature).__name__)

# Materialise the whole dataset (random access for diff/flatten)
ds = read_aixm_dataset("aip.xml")
print(len(ds.features), "features")

CLI

aviconv aixm parse      aip.xml > aip.ndjson
aviconv aixm to-aixm    aip.ndjson -o roundtrip.xml
aviconv aixm to-geojson aip.xml -o aip.geojson
aviconv aixm diff       cycle_2603.xml cycle_2604.xml --format json
aviconv aixm flatten    aip.xml --at 2026-05-09T00:00Z -o snapshot.xml
aviconv aixm validate   aip.xml --strict

Round-trip semantics

AIXM round-trip is field-level, not byte-stable: namespace prefix choices and gml:id values are intentionally not preserved on read. gml:identifier (the stable feature ID) is preserved, as are all modelled feature properties and time-slice metadata.

Licence

MIT. The vendored AIXM 5.1.1 / GML 3.2.1 / ISO 19139 / xlink schemas retain their upstream licences — see LICENSES/.