When importing adjusted photo heights into PhotoScan, the photo name is used to attach the adjusted image height to the photo in the PhotoScan project. The photo numbering system used by DJI aircraft starts at DJI_ 0001 and goes up to DJI_0999. When the number of photos exceeds DJI_0999, the photo count starts back over…
This workflow is for AirGon Drone Mapping Suite customers who do not use Loki and instead use ground control points for accuracy. To process images in PhotoScan using control points, it is important for the image heights to be relative to the same vertical datum as the control points. Some drone models cannot determine their…
One of the steps in AirGon’s PhotoScan processing workflow is to build a 3D mesh. The mesh building step usually consumes more memory than other steps in the workflow and can lead to a memory error if the capacity is exceeded. The source of this problem can sometimes be traced back to the selection of…
There are lots of drones to choose from for mapping purposes, but a couple of stand-outs from DJI are the Phantom 4 Pro and the Inspire 2. They both provide excellent flight times and they also have mechanical shutters. This is important to eliminate the geometric distortions inherent with electronic rolling shutters, which are typical…
In addition to viewing orthos and other image layers in Reckon, users also have the option to download the layer to a local drive. The following steps describe the process for downloading an image layer from Reckon. Step 1 – User requests an image. In the Table of Contents, left click on desired image layer. Left…
To download data from Reckon, first select the date from the drop down menu that corresponds to the data you wish to download. The layers associated with this date should be displayed in the Table of Contents on the left side of your screen. Left-click the layer name and select from the list of options…
This workflow is for reprojecting, shifting, or scaling in x, y, and/or z direction, for LAS data. This is useful for converting: Geographic Spatial Reference System (SRS) to Projected SRS and vice versa. Projected SRS to another Projected SRS Different measurement units: US survey feet, international feet and meters. Removing vertical bias from LAS data…
Problem: When loading an orthophoto image into LP360/Topolyst no image is displayed, yet when you zoom in it becomes visible. Modifying the LP360 image display properties shows the image extents properly and the header checks out. Probable resolution: We suspect that the overviews in the image file are corrupt/invalid. One can use the GDAL tool to…
Calibrate IMU and Compass after updating new firmware for AV900 If AV900’s firmware is updated, it’s recommended that the IMU and compass should be re-calibrated. Here are the step-by-step instructions to re-calibrate them: Prepare the Drone Insert and secure the battery into the AV900 Raise and secure the GPS/Compass (fig. 1) Figure 1. The GPS/Compass must be…
