Longitudinal is a specialized QGIS tool designed to generate longitudinal profiles (cross-sections) along line and point data. It significantly simplifies the visualization of elevation profiles for planners, engineers, and surveyors.
This plugin generates precise elevation profiles directly from your GIS data. A key highlight is the integrated export interface, which enables a seamless transition from GIS to CAD environments.
- Category: Civil Engineering / Water Management / Surveying
- CAD Integration: High-quality DXF Export
- Developer: Amphibitus / geoplaning GmbH
- Profile Analysis: Creates longitudinal sections based on line geometries (axes) and point layers (elevation data).
- 💾 DXF Export: Export your finished profile directly as a DXF file for further processing in AutoCAD, BricsCAD, or Civil 3D.
- Second Elevation Line: Supports an additional reference line (e.g., comparing ground level vs. pipe/trench invert).
- Dynamic Elevations: Interactively adjust the height of the second profile line directly within the dialog window.
- Flexible Scaling: Full control over horizontal scales and vertical exaggeration for optimal visualization.
- Open the QGIS Plugin Manager (Plugins > Manage and Install Plugins...).
- Search for "Longitudinal" in the "All" tab.
- Click Install Plugin.
Note: If the plugin does not appear, go to the manager's settings and enable the option "Show also experimental plugins".
- Download this repository as a ZIP file.
- Extract the content into your QGIS plugin folder:
- Windows:
%AppData%\Roaming\QGIS\QGIS3\profiles\default\python\plugins - Linux/macOS:
~/.local/share/QGIS/QGIS3/profiles/default\python\plugins
- Windows:
- Restart QGIS and enable the plugin in the Plugin Manager.
- Select Axis: Select the line layer that defines the horizontal path of your profile.
- Set Elevation Source: Choose the layers providing the Z-values (elevations).
- Generate Profile: Create the graphical preview with a single click.
- CAD Export: Use the export button to save a scaled DXF file for your CAD project.
Found a bug or have an idea for a new feature?
- Feel free to create an Issue on GitHub.
- Check out the Wiki for detailed instructions.
Developed for efficient engineering directly within QGIS.