Drone2Map Image Altitude Adjustment

Question

I'm running into a strange error when adjusting the altitude of my images in Drone2map.  I'm on version 2023.1.1. When I use the Adjust Image Altitude tool in drone2map, the tool adjusts my image to a completely wrong value. My methodology is adjust using constant elevation, unchecking "use metadata" and entering the Phantom 4 Pro's barometer reading using a separate exif reader tool, and entering the elevation of takeoff I captured using submeter Geode GPS unit. I'm using meters for both.

For example, The pop-up box will than confirm "Altitude will be set to 687.48 meters + 60.7 meters." Once I run I will get a value that is clearly not 687.48+60.7. Instead it changed my image altitude to 15.93 meters.

Any suggestions on what's going on? This is a new problem I've run into.

P√•l_Herman_Sund · Answer

@LikaLoechler workaround is to use "Flight Data > Export GPS" to a CSV. Change altitudes (in a spreadsheet or a Python script) and save results to a csv, then import the corrected data via Flight Data > GPS Source > Import . Corrected CSV file could look like

imagename,datetaken,filename,latitude,longitude,altitude
DJI_0001.JPG,21.09.2021 09:46:23,C:	emp\DJI_0001.JPG,59.897831777777775,10.608416499999999,86.42

P√•l_Herman_Sund · Answer

..and the expectation on my side for constant elevations of 86.42 meters.. (what happens is I get existing elevation 125 + 86)

P√•l_Herman_Sund · Answer

@CodyBenkelman I have an example here where I needed to adjust flight altitudes approx for geoid height

So my altitudes are approx at 125.8 and I want to lower them by approx 40 meters or as shown just set the altitudes at a constant elevation (86.42).

Trying this gives a dialog

and the expectation on my side for constant elevations, but results are

0 + 86.42 = 212 is a surprise. But it might very well be a misunderstanding on my side

best

Pål Herman/pH