AGS324 - A utility library for upgrading AGS 3.1 data to AGS 4 (and back).

This package provides tools for:

• Upgrading AGS 3.1 files to AGS 4 format, with minimally required data for usage of Autodesk Civil 3D(R) Geotechnical Modeler(R).
• Upgrading AGS 3.1 files to a specific AGS 4 version (4.0.3, 4.0.4, 4.1, 4.1.1, 4.2).
• Downgrading AGS 4 files back to AGS 3.1, preserving optional group prefixes.

Note: Autodesk Civil 3D(R), Geotechnical Modeler(R) are trademarks of Autodesk, Inc. This package is not affiliated with or endorsed by Autodesk.

Basic usage

Import

from AGS324 import ags4_c3dgm, upgrade, downgrade

All three conversion functions accept an optional output path as their second argument. When omitted, the output file is written next to the input with a default suffix appended (_AGS4.ags for upgrades, _AGS3.ags for downgrades).

Upgrade an AGS 3.1 file for Civil 3D Geotechnical Modeler

ags4_c3dgm("input.ags")                        # writes input_AGS4.ags
ags4_c3dgm("input.ags", "custom_output.ags")   # writes custom_output.ags

Upgrade an AGS 3.1 file to a specific AGS 4 version

upgrade("input.ags", version="4.1.1")                        # writes input_AGS4.ags
upgrade("input.ags", "custom_output.ags", version="4.1.1")   # writes custom_output.ags

If version is omitted, upgrade() targets the latest bundled AGS 4 version (4.2). Supported versions: 4.0.3, 4.0.4, 4.1, 4.1.1, 4.2.

Downgrade an AGS 4 file to AGS 3.1

downgrade("input.ags")                        # writes input_AGS3.ags
downgrade("input.ags", "custom_output.ags")   # writes custom_output.ags
downgrade("input.ags", version="4.1.1")       # force a specific source-version crosswalk

If version is omitted, downgrade() auto-detects the source AGS 4 version from the file's TRAN_AGS field, falling back to the latest bundled version (4.2) if the field is missing or unrecognized.

Acknowledgements

The bundled ags4*_standard_dictionary.ags files are sourced from the AGS Data Format Working Group's ags-python-library.