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Add DXF export feature #6247

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@meyerlor
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@meyerlor meyerlor commented Nov 23, 2025 •
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Implements DXF export functionality allowing users to export the current map view as a DXF file via QGIS Server.

Features:

  • Export UI with scale, symbology mode (symbol layer/feature/none), and layer options

  • Automatic WFS layer detection (only WFS-enabled layers can be exported)

  • Filename format: ProjectName_Timestamp.dxf

  • Custom DXF export icons (white default, dark on hover)

  • QGIS Server FORMAT_OPTIONS support (MODE, SCALE, FORCE_2D, NO_MTEXT, USE_TITLE_AS_LAYERNAME)

  • Translations: en_US, de_DE, fr_FR

Limitations:

  • DXF layer order is determined by QGIS project configuration, not controllable from client

Needed/ToDo

  • Implementing Tests

Would love to see this in future lizmap versions - this is just a demonstration/draft. I'm happy to discuss how to advance this. Specific points needing some input are:

  • How to controll access to this feature (should it be enabled via the QGIS Plugin, should i implement user/group rights managment?
  • I could also try and move this implementation into a installable module like AltiProfil and similiar ones, if you think that it is not needed/wanted in lizmap core?

A working release:
lizmap-web-client-3.11.0-DXF-export.zip

As requested here:
3liz/qgis-wfsOutputExtension#27

@github-actions github-actions bot added this to the 3.11.0 milestone Nov 23, 2025
@meyerlor
Add DXF export feature
702e51c 
Implements DXF export functionality allowing users to export the current map view as a DXF file via QGIS Server.

Features:
- Export UI with scale, symbology mode (symbol layer/feature/none), and layer options
- Automatic WFS layer detection (only WFS-enabled layers can be exported)
- Filename format: ProjectName_Timestamp.dxf
- Preserves layer visibility, opacity, styles, and filters
- Custom DXF export icons (white default, dark on hover)

Technical improvements:
- Refactored into smaller, focused methods for better maintainability
- Precise scale calculations with proper geodesic formulas for geographic coordinates
- Eliminated code duplication (WFS filtering centralized)
- Proper event listener cleanup in disconnectedCallback
- Static constants for magic numbers (DPI, conversion factors)
- Functional programming patterns where appropriate
- Clear separation of concerns (rendering, data collection, export logic)

Translations: en_US, de_DE, fr_FR

Limitations:
- DXF layer order determined by QGIS project configuration

Open:
- Rights management (ACL2) needs maintainer input
@rldhont
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rldhont commented Nov 24, 2025

Thanks @meyerlor !

Can you provide a print screen ?

@nboisteault
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nboisteault commented Nov 24, 2025

@meyerlor thanks.
You just need to add English version in lizmap/modules/view/locales/en_US/dictionnary.UTF-8.properties. Translations are then handled via transifex.

@meyerlor
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meyerlor commented Nov 24, 2025 •
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@rldhont here a gif recording:
DXF-Export
And the created .dxf:
Bermatingen_2025-11-24T09-09-34.zip

One thing really buggers me - i can not control/manipulate the layer order in the resulting dxf, it always seems to be alphabetical.

@nboisteault ok, then i will delete the FR/DE translations!

@meyerlor
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meyerlor commented Nov 28, 2025

Can you provide some guidance how/if/where some rights-managment should be implemented? I have some time this weekend and would love to advance this (provided you want this functionality?) 😃
Some options i thought about:

  1. Like Printlayouts, create a new category in the Lizmap Plugin where you can set user(groups) to have the dxf-export functionality
  2. Have it in the repository-managment in LWC
  3. Implement it as installable module
  4. ... ?

@rldhont
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rldhont commented Nov 28, 2025

Hi @meyerlor I have imagined to add a config in lizmap-plugin.

@gioman
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gioman commented Nov 30, 2025

I guess this fixes also 3liz/qgis-wfsOutputExtension#27

@meyerlor
Add group-based access control for DXF export
b59f674 
Implements user group restrictions for DXF export functionality
based on configuration from the QGIS plugin.

Client-side controls:
- Only display DXF export minidock when dxfExportEnabled is true
- Check user group membership against allowedGroups configuration
- Hide UI completely if user lacks access permissions

Server-side validation:
- Validate DXF export requests in GetMap controller
- Check dxfExportEnabled flag from project configuration
- Verify user belongs to allowedGroups (if specified)
- Return 403 Forbidden if user lacks permission

Configuration options (from .qgs.cfg):
- options.dxfExportEnabled (boolean): Enable/disable globally
- options.allowedGroups (string): Comma-separated group IDs
  Empty or unset: all users can export (when enabled)
  Non-empty: only users in specified groups can export

Implementation details:
- Handles both JSON boolean and string boolean values correctly
- Uses is_bool() check before string comparison to avoid type issues
- Enforces same access policy on both frontend and backend
- Translations managed via Transifex (English only in source)
@meyerlor
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meyerlor commented Nov 30, 2025

@gioman yes, exactly!

@nboisteault i removed the translations

I did open a PR to the lizmap-plugin: 3liz/lizmap-plugin#666

A working, installable release with the functionallity implemented (and the rights-managment which will be written into the .qgs.cfg with the plugin) can be downloaded here:
lizmap-web-client-3.11.0.dxf-export_acl.zip

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@nboisteault nboisteault Awaiting requested review from nboisteault

@rldhont rldhont Awaiting requested review from rldhont

@mdouchin mdouchin Awaiting requested review from mdouchin

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backport release_3_10 new feature

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@meyerlor @rldhont @nboisteault @gioman