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Tip #186 - Scan Inspections

By Hannah Poon posted 06-27-2022 10:42

  

Hey TBC’ers! Have you ever wanted to perform a scan inspection to display positioning deviations between either of the following pairings: a 3D object (e.g., a surface, mesh, TRB, or IFC model) and a point cloud region or two point cloud regions? The Scan Inspection command creates a differential color map (“heat map”) that graphically displays the deviations between the two selected objects in a variety of formats! This great, new feature was introduced in Trimble Business Center v5.70


Follow the steps below to learn how to perform a scan inspection.

  • Select Scan Inspection in Point Clouds > Deliverables to display the Scan Inspection command pane. 


  • In the Inspection name field on the Create tab, enter a name for the scan inspection that will display in the Project Explorer when you save the inspection in your project.


  • Select the appropriate Inspection type. Here, we will select Scan to 3D object


  • Click in the 3D object selection field and use the Project Explorer or 3D View to select the 3D object (in this case, an IFC model) to be included in the inspection. 


  • In the Reference point cloud region dropdown list, select the point cloud region to which to compare the selected 3D object (in this case, SI_Demo). 


  • In the Maximum distance field, enter a distance between the selected objects that if exceeded, will cause a scan point to be excluded from the comparison (considered an outlier). 


  • Optionally, check the Use absolute distances (positive values only) check box to specify that all negative delta distances (that is, distances inside the 3D object or origin point cloud) be made positive.

  • In the Color map dropdown list, select the color map you want to use to display the comparison data.


  • When you are ready, click the Save Inspection button to save the scan inspection in your project. 


  • The new color map is displayed in the 3D View, and it is represented by a new Point Cloud Inspections child node in the Project Explorer. You an use the View Filter Manager to hide or show the Point Cloud Inspection color map in the 3D View. (The associated scan must also be displayed.) To view and hide the legend for the color map, right-click the new Point Cloud Inspections child node in the Project Explorer and select Toggle Legend.


  • To view properties for a scan inspection, right-click it in the Project Explorer and select Properties. In the Properties pane, you can change the Maximum distance and/or toggle Absolute distances on and off.


Looking for more in-depth instructions on how to use the Scan Inspection command? Open up TBC on a supported device and press F1. The Trimble Business Center Help window will open. Search “scan inspection” to learn more.

To download TBC v5.70, you can head to https://trimble.com/downloadTBC. To learn what’s new in our latest release, you can visit https://geospatialresources.trimble.com/blog/whats-new-in-trimble-business-center-version-5-70.


Complete free self-paced workflow-based courses with hands-on guided software experiences on Learn.Trimble: https://learn.trimble.com/pages/422/trimble-business-center-tbc


For additional learning content, visit our TBC Survey and Construction YouTube page:

https://www.youtube.com/user/TBCSurvey/videos


I hope this tip comes in handy in one of your upcoming Field to Finish Workflows!
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