145 articles AirGon Tools, Tips and Workflows Page 2 / 15

Recommended Number of Flight Lines for a Mapping Mission

Structure from Motion (SfM) algorithms used by image -to-point cloud applications require strong overlap to create an accurate 3D model.  Missions should be planned to include both forward overlap, and side overlap.  To achieve this, the mission must have at least two flights lines, but more is better.

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Using a Non-Corrected Base Position in ASPSuite

It is always best practice to submit your static base observation data to an online post-processing service to obtain the position of your base station.  However, it is possible to process your Loki data with a base coordinate that has not been processed.  If a base position is needed to check for a fixed solution…

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Is Loki compatible with other Structure from Motion software aside from PhotoScan and Pix4D?

The answer to this question will depend on the Structure from Motion software being used.  The two primary components are:   The ability to use high-accuracy geotags.  Loki provides highly accurate geotagged images with accuracy values written to the XMP metadata.  We also produce a simple .csv text file for applications unable to read that…

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ASPSuite Error: Unable to download GPS Ephemeris and Navigation Files

Problem: Attempting to auto-download the ephemeris and navigation files in ASPSuite results in, “Unable to download GPS Ephemeris and Navigation Files. The remote server returned an error: 227 Entering Passive Mode.” Probable Resolution #1: Verify your internet connection and try the download again later when the files may be available as they may not be immediately…

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ASPSuite: GNSS Quality Levels Explained

In step 3 of the processing wizard of ASPSuite the GNSS information is processed in an attempt to generate a good quality rover position file for use in downstream processing. While processing the GNSS solution a command window displays the quality level (Q level) for each epoch of the solution. Review this information for the…

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Local Coordinate Systems in AirGon’s ASP Suite

Using Loki, AirGon’s precision positioning system, very accurate georeferenced imagery can be collected using DJI drones over an area of interest. The positions from which those photos are captured are output from the ASP Suite workflow as geographic locations, described by latitude, longitude, and altitude coordinates. Image-to-point cloud software applications such as Agisoft PhotoScan and…

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How to verify if the Maxtenna is functional after a crash?

Problem: We experienced a crash with our UAV and Loki system and would like to verify the Maxtenna is functional. Procedure: Put the Maxtenna on a Loki and take it outside Turn on the Loki Wait until the green antenna light comes on Wait about a minute Plug the Loki into a computer and check…

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Downloading DJI Log files (DAT file) From Your Aircraft

To download the DJI log file (DAT file) from your aircraft, you will need to use the following steps: Connect your aircraft to your computer with USB cable that was provided with your aircraft. Phantom 4 Pro – Micro USB M200/210 – USB A Power on the aircraft. Open DJI Assistant 2. (You will need…

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Agisoft Lens User Manual

The Agisoft Lens User Manual provides information and guidance on the use of Agisoft Lens. Agisoft Lens is an automatic lens calibration software, which uses an LCD screen as a calibration target. It supports estimation of the full camera calibration matrix, including non-linear distortion coefficients. Estimated calibration parameters can be saved in human readable file…

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Reproject Raster in LP360

LP360 has a Point Cloud Task (PCT) that can reproject raster layers, create pyramids, and JPEG compress.  The PCT is named Reproject Raster.  When we reproject an existing orthophoto to a new coordinate system, or re-write to a different unit, the user can choose to output uncompressed, or JPEG compressed. If JPEG compression is selected, the user…

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