I am using data in a GIS application that shows some land or islands in areas where I would not expect such, or at least have never heard that there are islands. How to find these in Google Earth? Do they have names?
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$\begingroup$ From looking at Google Earth, they appear to be artifacts of the GIS system you are using. Can you interrogate the GIS system to find out what if it has names for the "islands"? $\endgroup$– FredNov 24, 2021 at 11:40
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$\begingroup$ I created the view in the image from a raster file, so there is no more information on it. But I see these "islands" in several papers which seem to have used the same land-sea mask. Maybe it has something to do with weather observation stations, according to the sample points in doi: 10.1038/s41597-020-0453-3 $\endgroup$– HeyGeorgeNov 24, 2021 at 11:58
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2$\begingroup$ The spots in the Bay of Biscay (France) & off the south east coast of Greenland appear to be ocean buoys. $\endgroup$– FredNov 24, 2021 at 14:40
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$\begingroup$ Maybe could say what raster file?? $\endgroup$– JeopardyTempestNov 24, 2021 at 16:17
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2$\begingroup$ Personally I'm more intrigued by the fact that Britain and Ireland (and the Isle of Man) are a single land mass. Even at that resolution, they should have done better. $\endgroup$– GrahamNov 25, 2021 at 0:37
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At the risk of sounding like the old MS Paperclip... it looks like your data are on the CRU TS land grid. This grid is known to have some rogue land points, as mentioned by Weedon et al (2014):
The 211 of the 67,420 CRU grid boxes outside Antarctica used in the WFD are incorrectly designated as land. These were omitted from the WFDEI files; leaving 67,209 land points outside Antarctica plus 27,533 within (the grid boxes are not of equal area).
I've never seen a clear explanation of where they come from, but I recall they have associated elevations of zero. I suspect that some of them are from moored buoys that were mis-characterized as land. For example, the Bay of Biscay box is probably the Gascogne buoy described in Turton and Pethica (2010) and the group to the west is probably Ocean Station PAP:
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1$\begingroup$ Feels like a 1980s video game should go along with those land grids and Clippy... $\endgroup$ Nov 24, 2021 at 16:19
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1$\begingroup$ @JeopardyTempest I was thinking more of the old teletype-based GIS images that used overprinting to get the right "pixel" shade $\endgroup$– SpencerNov 25, 2021 at 0:01
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$\begingroup$ Why is it showing Ireland as being connected to Great Britain? I'm pretty sure a bunch of Irish people would be pretty unhappy at being lumped in with the UK like that... $\endgroup$ Nov 25, 2021 at 5:21
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2$\begingroup$ @nick012000 - The bit that is connected on that image is Northern Ireland. And the people there would be delighted to be more closely linked to the mainland. $\endgroup$– ValorumNov 25, 2021 at 7:32
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1$\begingroup$ @Valorum: Well, some of the people. Apparently it's a little controversial. $\endgroup$– psmearsNov 25, 2021 at 16:27