GeoCue’s repository of TrueView tools, tips and workflows for the TrueView line of drone mapping products. Includes former AirGon products such as Loki and ASPSuite.
Executing the Reproject LAS Point Cloud Task encounters the error, “Error setting up the transformation: Missing geoid file for source vertical coordinate system.” The spatial reference system (SRS) must be properly set on the LAS Layer as that is where the Reproject PCT will be looking for the information. For example, if the original LAS…
A common issue that is encountered when trying to take a bare earth surface generated from LIDAR or photogrammetric point cloud datasets into other programs is that those other programs cannot handle the volume of data. LP360 currently provides four options that can be used to thin the bare earth dataset to allow you to…
Starting the Create True View Trajectory process results in a Trajectory File Time Range Warning, “Warning: The Post Process Trajectory File start time was AFTER the start time of the first flight line. Geocoded LIDAR may not cover all of your flight lines. Continue and create all possible Trajectory Files?” This check was put in…
Attempting to run POSPacCloud to process the trajectory solution for a TrueView 3DIS results in an error message stating, “POSITION_FILE_PARSE_FAILED”. Verify the project path contains no special characters as the Applanix POSPacCloud utility cannot handle them. If you do have special characters, close TrueView EVO, take the special characters out of the path, then re-open…
The following is a brief explanation for how to set filters for classification flags in LP360. The Live View Filter allows the user to set flags for: single class, multiple classes, single flag, or multiple flag combination scenarios. For this example, we will review setting the Live View filter for displaying these flags. The same…
Canopy Height Model (CHM) is important for a variety of uses. The distinguishing factor of this model is that it is a height above ground model and does not represent absolute elevation. We can produce this model in LP360 with the following workflow that incorporates Point Cloud Tasks (PCTs) and the export function. Note: the…
In Feature Analyst, the Flat Feature analysis function allows the user to test that the delta Z (MaxZ – MinZ) for all vertices of a feature is less than the specified Z tolerance range. By default the value is 0, but the user can specify the tolerance value when activating this function in the Feature…
LP360 Drone has a wealth of tools and workflows for point classification and exploitation. Below is a simple streamlined guideline for producing a ground surface. With a ground surface, the user can: better differentiate/classify vegetation, create contours, create a bare surface model for importing into CAD software, etc. This is accomplished by running a series…
The user in unable to edit LAS points in LP360 or True View EVO and receives the following error message: “Filters require editable points. Open the LAS files for read/write and try again.” Note: Read/write functionality applies to all True View Evo users. Also, applicable to all Standard and above LP360 license level users. For…
Originally posted on the GeoCue Group website on May 28, 2020 What causes “Noise”? Drone LIDAR systems that use “automotive grade” laser scanners are known to be “noisy” as compared to a high end survey grade LIDAR such as those from Riegl. Part of this noise phenomenon is an illusion caused by close point spacing (Nominal…
