Survey Image Aligner – Geodetic & Construction Workflow
Survey Image Aligner is a Blender add-on designed for precise alignment of survey and reference images in real-world coordinates.
ABOUT
Survey Image Aligner is a Blender add-on designed for precise alignment of survey and reference images in real-world coordinates.
It allows you to accurately rotate, scale, and translate image planes using two-point correspondence, making it ideal for surveyors, technical artists, and visualization workflows based on measured data.
Instead of manual eyeballing, the add-on calculates the exact transformation needed to align an image to the XY plane based on two known reference points. This ensures consistency, repeatability, and correctness when working with site photos, scanned drawings, or survey imagery.
Key Features
* Align image planes using two known points
* Precise rotation, scale, and translation in world coordinates
* Designed for surveying and technical workflows
* Clean, minimal UI integrated into Blender
* Non-destructive workflow – works on existing image planes
Ideal for infrastructure, construction, and site visualization
Typical Use Cases
* Aligning survey photos to real-world coordinates
* Preparing reference images for civil engineering models
* Technical visualization and site layouts
* Accurate underlays for modeling based on measured data
Requirements
* Blender 5.0
* Image planes with known reference point coordinates
Built for users who need accuracy over approximation and want their reference data to match reality.
Documentation
Overview
Survey Image Aligner is a Blender add-on for accurately aligning reference or survey images to real-world coordinates.
It is designed for technical workflows where precision matters, such as surveying, civil engineering, infrastructure modeling, and site visualization.
The add-on aligns an image plane using two corresponding point pairs:
* two points defined on the image
* two points defined in 3D space (world coordinates)
Based on these correspondences, the add-on calculates the exact rotation, scale, and translation required to align the image to the world XY plane.
How It Works
To perform an alignment, the following data is required:
Two reference points on the image
These points represent known locations visible in the image.
Two reference points in 3D space
These points define the real-world positions (XY coordinates) the image should align to.
Using these two point pairs, the add-on computes a transformation that matches the image to the defined real-world positions.
Typical Workflow
* Add or select an Image Plane in the Blender scene.
* Define two points on the image corresponding to known locations.
* Define two points in 3D space representing their real-world positions.
* Run the alignment operation.
* The image plane is transformed to match the defined world coordinates.
The resulting image can then be used as a precise modeling reference.
Key Features
* Two-point correspondence alignment (image ↔ world space)
* Accurate rotation, scale, and translation
* Alignment to world XY plane
* Works with existing image planes
* Clean and minimal user interface
Requirements
* Blender 5.0 or newer
* An image plane to align (or curve - for dxf imports)
* Two known reference points on the image
* Two corresponding reference points in 3D space
Intended Use
This add-on is intended for users who work with measured data and need their reference images to match real-world scale and orientation before modeling.
It is not a GIS or photogrammetry tool, but a lightweight and reliable alignment utility for Blender-based technical workflows.
