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2017

 

Have you signed up for our July Power Hour yet? We'll be talking about working with grid and ground coordinates with Mark White, Duncan-Parnell's training and support manager. Check out the session's topics and sign up today!

 

Geospatial Webinars 

 

If you are having troubles registering, please use this link to sign-up:

 

https://register.gotowebinar.com/rt/8364179950022961923 

We'll be talking about working with grid and ground coordinates with Mark White, Duncan-Parnell's training and support manager. Check out the session's topics and sign up today!
 

Managing data and planning for projects is complemented using the Google Earth viewing options available in TBC.  The first option is using the Google Earth command.  This  feature allows you to transfer survey data through a KML file into Google Earth.  

The offset fields allows you to apply necessary translations to the data to better match imagery in Google Earth as they may initially line up to a certain accuracy.  Offsets vary depending on the accuracy of the imagery in Google Earth. Rectifying and combining images taken from differing orientations and altitudes will cause the superimposed survey data to appear to be located incorrectly.

The Altitude mode allows you to export the data with two methods:

  • Clamp to Ground ensures all points are located at ground level.
  • Absolute ensures all points are displayed at their correct elevation based on the offset value you enter in the Elevation box.

The Google Earth command supports viewing these data types from TBC: HALs, baselines, contours, line and point features, observations (displayed as lines), photos, trajectories, and event markers.

 

 

Another option for visualizing data in Google Earth is using the KML/KMZ exporter.  How do you choose which export option to use for Google Earth?

  • Output kml file creates a KML (.kml) file that contains 3D geographic coordinates only. It does not include photo images.
  • Output kmz file creates a ZIP file that contains a KML file and all referenced photographic image files. The images can be viewed by selecting the image icons in the browser used to open the KML file.

The same offset and altitude options exist in the KML/KMZ exporter.

 

Now you can view your data in Google Earth for project planning and management and an added deliverable for clients.

 

 

 

Note: The difference between KML and KMZ files is that the KMZ file is a compressed version of the KML.  

 

Don’t forget to send us a message if you would like to see a certain feature highlighted in next week’s tip.

Have fun this week using TBC and as always, Happy Surveying!

 

 

 

TBC Team

This tip of the week is brought to you by one of our Application Engineers, Arnaud Lezennec.  Thanks for another great tip Arnaud! 
Application Engineer, Arnaud Lezennec. Thanks Arnaud

One of the many deliverables you can create in TBC using scan data is orthophotos.  Cleaning your scan data is necessary to produce orthophotos, but can be time consuming depending on the density and size of the point cloud.  This tip demonstrates a workflow to clean up your scene in seconds.

  1. Open the “Create Orthophoto” command and define the projection plane on the facade of the building.



  2. Next, clean up the data from within the Cutting Plane View
    1. Open the cutting plane view for the same plane



    2. In the cutting plane view side panel, check the box “Apply cutting plane” and set a thickness (2.0m here). This will filter out the data further than 2m from the plane



To refine the scan points used to create the orthophoto, you can:

  • Adjust the thickness in the cutting plane view. This will take more of less points around the plane
  • Use the standard “Keep In” and “Keep Out” workflow to clean up you scene further with a polygonal selection, now that the view is much easier to understand

 

Your scans are now clean to create an orthophoto for drafting, export, or final deliverable. 

This concludes another TBC tip of the week.  Happy Surveying!

 

 

TBC Team