Relative vertical accuracy, or flight line offsets, or the swath-to-swath fit between flight lines or drive passes can be qualitatively assessed using dz images. Or quantitatively assessed by exporting and analyzing the values. The USGS LiDAR Base Specification has evolved over the years with some different recommendations for evaluating interswath (overlap) consistency, and there are…
Attempting to save an LP360 project results in “An error occurred updating the Project Catalog with Project:”, followed by “Detail: Error: Unable to open Projects File. Project not added to list. C:\ProgramData\LP360\PMProjects.json”. The global projects file, “%ProgramData%\LP360\PMProjects.json”, used by the LP360 Project Manager was created with administrator permissions when LP360 or TrueView EVO first launched…
Some LP360 Point Cloud Tasks (PCT’s) were originally designed for older manned lidar datasets, which have significantly lower point density than modern sUAS datasets. TrueView and other sUAS sensors have the capability of producing much denser point clouds, so these processes can take much longer if running on the entire dataset. A common strategy and workflow…
TrueView 3DIS (3D Imaging Systems) produce images and positional information which can be imported into TerraPhoto for orthomosaic generation, point cloud colorization, powerline workflow – image view, etc. Here we’ll review the process for importing this data into TerraPhoto, which includes: exporting a photo package from TrueView Evo/LP360 Drone, rename the images for import into…
Situations may occur where your base station starts logging data after your TrueView cycle is initialized or the quality of your base station is of poor quality at the beginning of your TrueView cycle. A potential workaround for this scenario is to alter the start of the POSPac trajectory solution. If you are a TrueView…
The following steps describe the process for updating your TrueView vA firmware for both TrueView 2DIS version A and TrueView 3DIS (imaging systems) version A. Version B and later systems have no control box and use a different firmware. The latest firmware update for all TrueView vA systems is available for download and installation from…
Details: GeoCue 2020 Service Pack (SP3) fixes several issues found with the GeoCue 2020 release covering a wide variety of issues. It is recommended that all users apply this service pack at the earliest convenience if already running GeoCue 2020, or immediately upon upgrading to GeoCue 2020. Users still working on previous versions of GeoCue are…
Running Metashape for EVO (MfE) errs almost immediately with a warning in the STDERR section of the processing log that states, “Warning: disabled [m/n] reference records with zero GPS coordinates”. The warning indicates there are one or more photocenters included in the layers submitted for the MfE job where the GPS Coordinates in the EXIF…
Classify by Elevation Quartiles In the Classify by Statistics PCT, the user can set the output of outliers and quartile classification using the standard output class/flag dialog. A little info regarding quartiles: https://byjus.com/maths/quartiles/. The section applicable to Quartile classification is shown in Figure 1: This classifier works as follows: The area to be processed (as determined…
An unknown antenna model can lead to biases in your trajectory solution since the antenna phase center (APC) to antenna reference point (ARP) offsets cannot be taken into consideration. If you are using a GNSS base antenna you have not used before, you should check the Base Station Information section of the POSPac report (Figure…
