How to Geo-reference Dot3D data to 3 control points (xyz or lat/long) without targets

How to Geo-reference Dot3D data to 3 control points (xyz or lat/long) without targets

To do this, please follow these steps after optimization:

1. Navigate to Edit>Coordinates
2. Select "Set" User Defined
3. Toggle from "Set an origin" to "Set 3 points"
4. Tap/click and hold on the screen to move your crosshair onto the right location for each point.
5. Input the corresponding coordinates for each point (if working in a local xyz system, uncheck the "Use Geo Coordinates" button).
6. Confirm.

Note that if using targets, you can leverage your control points for not only georeferencing but also for intelligent optimization improvement. If not using targets, this procedure will only help to rotate/translate the otherwise static dataset into the proper coordinate system (hence why you do this after optimization in this case). A.k.a. targets (AprilTags) are always the best option whenver possible.

    • Related Articles

    • Targeting: How to Reference Survey Control Coordinates in Dot3D 5.0 & Up

      1. Obtain a minimum of 3 AprilTag target coordinates (i.e. from survey instrument, measurement, reference model, another point cloud, etc.) 2. Set up a .txt target control file in the following format: AprilTag #, x, y, z AprilTag #, x, y, z AprilTag ...

    • Survey Control Targeting Tutorial (Dot3D 5.0+)

      Welcome to the Dot3D (5.0+) survey control targeting tutorial. This video will walk you through the full process of referencing known target coordinates to your Dot3D scans before optimization for the most accurate and geo-referenced results in ...

    • Using Survey Control Targets In Dot3D

      (For a video tutorial, click the link here) When creating a scan with Dot3D, you may want to use known Survey Control points, to increase the accuracy of the scan, or to fit it into a coordinate system To begin, when creating your scan, you will want ...

    • How to Use Targeting without Targets in Dot3D

      Targetless Targeting: How to Use Targeting without Targets in Dot3D™ Targeting is a great way to improve the accuracy and reliability of your Dot3D scan data, especially across larger scenes. Did you know that you can use targeting even if you didn't ...

    • Using AprilTags for Loop Closure in Dot3D

      Overview: AprilTags for Loop Closure provide a way for Dot3D to identify 3D points in the scene across different points in time. They do not require any additional measurement or manual input and will never decrease your optimized data quality, so ...