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TV1 and TV1 Lite processing with LP360

LP360 Agent
  • Updated

Introduction

This article is a step by step guide to process a TV1 and TV1 Lite dataset in LP360 Drone. A tool setting guide can be found either in the help section or in the LP360 Drone User guide.
If looking for batch processing, check this article.

Pre-Requisites

To process a TV1 or TV1 Lite dataset, the user will need to have LP360 v2025.1 or newer. LP360 Drone license is required to be checked out. 

Import

  1. Select "Import Raw Missions into New Project" on the Startup dialog or select Cycle Import on the Sensor tab.
  2. Under the Sensor Type, select "TrueView / Microdrones", then press Next.
  3. Select "Folder" to import the raw data from the sensor (figure 1).
    • You can select 1 or more cycles (flights) to be processed within the same project. Once all cycles are loaded into the dialog, press Next.


ImportWizard_TrueViewFlights.png

Figure 1: Raw Mission Import Wizard - Input TrueView Flights

  1. Select the base station file in Rinex or T02 file format, then press Next.
    • Note: base station files can also be imported in the Trajectory Processing dialog.
  2. Select the Projects Root Folder if this has not been pre-selected under your Project Settings and give the project a name.
  3. Select the desired Project Coordinate Reference System (CRS)

ImportWizard_TV1ProjectSettings.png

Figure 2: Raw Mission Import Wizard - Output True View Project


Tip: If you do not know the CRS, you can always select WGS84 UTM zone XX in Ellipsoidal height. LP360 shows the recommended UTM zone.

  1. Press Next to review the Flight/Base Positioning page (project import summary). After reviewing the cycle(s) for import, press Finish.

Imported_TrueView1Cycle.png

Figure 3: Imported TV1 Project Example

Point Cloud generation

Flight lines generation

  1. Select Auto Create Flight lines TrueViewIcon_Auto Create Flight Lines.png on the Sensor Tab or the Wingtra/Other Tab. 
    • Adjust parameters (Min Length, Turn Radius, and Max Deviation) if desired
    • Press Compute Flights Lines (figure 4)

Tips for Flight Lines Parameters:

    • Use the Measure tool Measure.png  on the Map Toolbar to learn approximately the flight line length.
    • Make the Min. Length smaller than the smallest desired flight line.
    • Increase Max. Deviation if terrain following is used. The example is in feet.

LP360_AutoCreateFlightLines_ComputeMode.png

Figure 4: Auto Create Flight Lines - Compute Mode

  1. Once satisfied, press Next to enter Edit Mode (figure 5)
  2. Select the undesired flight lines and delete them using the Delete key on your keyboard. Press the Enter key to confirm the deletion.

LP360_AutoCreateFlightLines_EditMode.png

Figure 5: Auto Create Flight Lines - Edit Mode

Trajectory Processing

  1. On the Sensor Tab, select the Trajectory Processing TrueViewIcon_Create Flight Lines from Selected Trajectory Point.png tool. 
    • For multiple cycle projects, use the Sensor Processing SensorProcessing.png tool.
      • In the Sensor Processing dialog, check the boxes next to Trajectory Processing and Geocoding, then press Next. 
      • Press the Settings TrueViewIcon_Settings.png icon to configure the Trajectory Processing settings.
  2. The first page of the dialog will show the Cycle Information and the Processing Mode settings. Select Single Base if you are using a Base Station observation file, then press Next.
  3. On the Base Station Settings Page, base observations can be added or removed under Base Station Observation File(s) section and the Survey Nail section allows users to select existing survey nails or create a new survey nail for processing.


 

  1. Once the Base Station settings are configured, press Next.
  2. On the Ephemeris Settings Page, press Download to retrieve the ephemeris data. Wait until the ephemerides are downloaded, then press Next.


  1. Review the Trajectory Processing summary,  press Submit. 
    • A confirmation dialog will appear. press Continue to confirm the submission.
  2. Open the Job Manager TrueViewIcon_Job Manager.png to monitor the processing status.


 

  1. Once the job has finished processing, the Status will change to "Ready" in the Job Manager TrueViewIcon_Job Manager.png. To complete the job, select it the press Complete Job on the right-hand side of the dialog.
  2. The Trajectory Plot will open --> Check the solution Quality



Tip: the solution desired is Q=1 100%, this means 100% fixed solution. It is represented by the green trajectory color. If you see any other solution, specially if the Q=1 is less than 95% read this article to learn if the solution is compromised.

 

Geocoding point cloud

  1. On page 3 of the Sensor Processing SensorProcessing.png dialog, press the Settings TrueViewIcon_Settings.png icon to open the Geocoding dialog.
  2. Select the Clip Angle.
    • Tip: clip angles is 50% of the  Field of View (FOV), if we select +/- 40 deg clip angle means 80 deg FOV. The maximum TV1 LiDAR FOV is 120 degrees. For most TrueView sensors, it is recommended to use +/- 40 deg Clip Angle or 80 deg FOV.
  3. Select the Clip Range (optional).
    • Tip: If you want to generate all the points with no filter, uncheck "Clip Angle" and "Clip Range".
  4. Once satisfied with the settings, press OK. If processing multiple cycles, copy/paste or configure settings for any remaining cycles, then press Finish.
    • If using the standalone Geocoding TrueViewIcon_Geocode LiDAR.png tool, press Submit.

  1. Open the Job Manager TrueViewIcon_Job Manager.png to monitor the processing status.
  2. Once the job has finished processing, the Status will change to "Ready" in the Job Manager TrueViewIcon_Job Manager.png. To complete the job, select it the press Complete Job on the right-hand side of the dialog.
  3. A new LAS Layer will be added to the Table of Contents.

Next Steps

Strip Align

To use this functionality, users must have the Strip Align Add-On License Product.

This step is optional. The Strip Align toolTrueViewIcon_Strip Align.png is intended to identify and correct the alignment between the flight lines in a single cycle, and/or between multiple cycles. For information on identifying when and how to use Strip Align, see the Strip Align page.

Control Points

If interested in 3D accuracy assessments using Accuracy Stars, Checkerboards, and/or Concentric Circles , users must have the 3D Accuracy Add-On License Product.

If you are only interested in estimating the accuracy of Z (elevations), check the Delta-Z Only option in the top left-hand corner of the Control Points Report Dialog and no additional licensing is required.

The intention of this step is to add check points and compare them to our point cloud to estimate the accuracy and review for any bias (constant offset in all the point cloud). If there is, we can remove it it and create a final QC accuracy report.

Smoothing

This step is optional. The Smoothing PCT will help reduce the point cloud noise envelope or the thickness of the point cloud. This algorithm works well for manmade structures, flat areas or regular surfaces. For information on how this tool works, please visit the Data Smoothing in LP360 page.

Exporting or Extracting Final Products/Deliverables

Using the Export Wizard, a variety of deliverables can be exported from LP360. Filtering noise

 

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