Reproject Scan During Processing

New
  • Published on May 18, 2026
  • 2 minute(s) read
  • JS
  • Matthew Toohey
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Processing raw RTK scan data in Aura allows you to generate an accurately georeferenced point cloud while applying the correct coordinate reference systems for your project. During setup, you can specify the base CRS used during capture, apply reprojection to a new horizontal and vertical CRS, and incorporate custom geoid models where required. The steps below guide you through configuring and processing an RTK dataset from start to finish.

What you will need

  • Raw RTK scan data ready for processing.

  • The base coordinate reference system used during capture.

  • (Optional) A custom geoid file (GTX or TIF) if not using a predefined vertical CRS.

Procedure

Step 1: Create a New Processing Job

  1. Open Emesent Aura and go to the Process tab.

  2. Select + Process Scan to create a new scan job.

  3. In the Configure New Scan Job panel, select the SLAM/RTK workflow.

  4. Click Add Dataset, browse to the folder containing the scan data.

  1. When Aura detects RTK data in the dataset, toggle on Use RTK data.

Step 2: Configure Output Location

  1. In the Location field, enter a name for the output folder.

  2. Aura creates a subfolder with this name, which stores all processed outputs.

Step 3: Set Georeferencing Options

  1. Click Processing Settings.

  2. Under Georeferencing in the General tab, select the RTK device and GNSS receiver used during data capture.

For optimal results, ensure that the Georeferencing mode and GNSS receiver type match the hardware used during data collection. While the resulting point cloud remains usable, the accuracy may be affected.

Step 4: Define the Base CRS

  1. Under Base coordinate reference system, select the CRS in which the data was originally collected.

  1. Alternatively, toggle on Custom base coordinate reference system to manually enter a PROJ string describing the geodetic CRS.

Step 5: Enable and Configure Reprojection

  1. Toggle on Reprojection to enable CRS transformation for the processed output.

  1. From the Horizontal dropdown, select a predefined CRS for horizontal reprojection.

  1. Once a Horizontal CRS is selected, the Vertical dropdown becomes active. From the Vertical dropdown, select a predefined vertical CRS, or click Import geoid file to upload a your own geoid file (GTX or TIF).

  1. Alternatively, toggle on Custom target coordinate reference system to manually enter a PROJ string describing the target CRS.

Step 6: Save Settings and Prepare for Processing

  1. Click Save to apply all settings. Aura will return to the Configure New Scan Job panel, where the processing job is ready to be Started.

Outcome

The raw RTK scan is processed into a georeferenced point cloud with the configured base and target coordinate reference systems applied. Outputs are saved to the specified location.