Incorrect Coordinates

August 11, 2022 08:32
13 comments

Hi,

I have a serial of points located in QGIS (I have georeferenced some images to a coordinates system (WGS_1984_Web_Mercator) and when I want to translate them to Dronelink, there is a big offset from the real coordinate to the position in Dronelink.

At first, I thought it was some error with the projection system (I didn't find anything about that in the Documentation, I have assumed the maps are using Web Mercator because that is what Mapbox is using), but if I open that same coordinate in OpenStreetMap or similar, the position is correct.

For example:

This coordinate: 41.36062345, 2.14460074

When I try to introduce it in Dronelink, it automatically gets corrected to that coordinate

And this is what I need:

Comments

13 comments

Rubén García
- Edited August 11, 2022 08:54
Just upgraded for importing from KML and I'm getting the same result, all the points are way off

I also tried to upload the same .kml to Mymaps and Google Earth, and both show the points in the correct position. Even if I export the map from Mymaps, Dronelink keeps importing them offsite

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Jim McAndrew Dronelink Staff
- August 12, 2022 22:11
Can you share the KML file?

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Rubén García
- September 13, 2022 12:58
Sure, here it is: https://mab.to/CbrDhQX0V

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Jim McAndrew Dronelink Staff
- Edited September 15, 2022 13:37
The coordinates appear to be the same to me:

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Jim McAndrew Dronelink Staff
- September 15, 2022 13:38
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Christian Grüner
- August 20, 2023 10:49
I see this too, up to 200 meters shifted! This is a huge problem for me, as I can't manipulate the coordinates in Waypoint mode, and I need to use QGIS for planning distances, view overlay etc.

I want to buy the 1-year plan, but this is honestly putting me off.

Above is Dronelink interpretion of the imported WGS84 based KML with 5 lines.

Above is the QGIS original (everything correct).

Above is Google Earth, where I imported the KML made in QGIS. Also everything correct. So the problem must be Dronelinks erroneous parsing of the KML.

Here is the KML: LinesTransekter.kml

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Martin Reading Dronelink Expert
- August 20, 2023 11:21
Just opened your kml in Dronelink and have no problem

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Christian Grüner
- August 20, 2023 11:28
That is pretty interesting! What browser and OS ?

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Martin Reading Dronelink Expert
- August 20, 2023 11:44
Waterfox G6.02b and windows 11, get the same results in Edge as well

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Christian Grüner
- August 20, 2023 12:05
I'm on Chrome 115.0.5790.173 and win 10 22h2. Also tried on Edge, where it first gave the offset. Then I tried once more, and success, no offset.
Then tried on Chrome again, now also works. That is pretty darn odd. Will test some more.

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Martin Reading Dronelink Expert
- August 20, 2023 12:10
Let us know how you get on. personally I wont have chrome on my PC's

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Victor Bloch
- May 01, 2025 18:03
So, what was the solution for this coordinate shift issue? I used Samsung Internet browser on tablet and the shift was about 10 meters (the grid corner was supposed to be on the field corner).

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Mike (Arizona Wyldwest) Dronelink Expert
- May 01, 2025 23:48
DL supports Firefox, Chrome, Safari & Edge. Any other browser may not work correctly. I’d suggest switching to Firefox as it has been proven to work the best.

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