Georegistration offset in Antarctica

Help and support
1

I spent a few months on the Antarctic peninsula and found a systematic ~150 m offset of the OSM offline and online vector tiles compared to a) satellite imagery and b) ground truth.

All satellite imagery overlays aligned with each other, but were ~150 m east of the OSM tiles. See OSMAnd screenshot below. White is OSM offline tile, pixelated blue in Google satellite imagery overlay.

I checked with multiple GPS devices on multiple occasions. They always showed the same position as my phone GPS within a few meters. I could often see a rock or coast I was standing on in the satellite imagery, while the OSM tiles suggested the coast was 150 m to the west and I should be standing in water.

Is there some way to correct this?

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2

The provenance of at least some of the data is noted here Antarctic Digital Database - OpenStreetMap Wiki it is quite possible that a dozen years ago this was the best source.

3

Thanks. I have lots of newer / better data sets that are properly georeferenced. I have not yet created a custom OSM layer, but have been thinking about it elsewhere. Once I figure out how to do that, I’ll update the data here. Unfortunately, low on my todo list at the moment since the satellite layers work well. Fortunately, probably not a problem for very many people.

4

I would point out that the data has to have a compatible licence or we need explicit permission and for example google is not a permissible source.

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5

Yup. Not a problem. All the data here should be compatible: https://www.earth-system-science-data.net/.