How can FamilySearch relocate an entire county to another province? (Canada 1871 census)
I've been reviewing sources for a profile and thought it odd that this person was b. in Ontario but in 1871 had moved to Nova Scotia. I dug into it a bit more, and found that no, he was in Guelph, Ontario for the census but FamilySearch's location "normalization" had moved him, his family, and I assume everyone from that city from Ontario to Nova Scotia.
Here's the record https://www.familysearch.org/ark:/61903/1:1:M4D9-B6L . I've seen some similar issues in the community but they suggest that the issue is in converting the Event Place (Original)" (which presumably is from the indexer) to "Event Place" (which has been automatically normalized). In this case both are identified as in Nova Scotia, when in fact the census entries were taken in Guelph, Ontario. Normalization did have an effect - it dropped Guelph, which isn't a geoname in Nova Scotia, and moved Wellington to a municipality in Queens County, Nova Scotia. (Wellington is itself a county in Ontario).
Just to corroborate my analysis I dug up the same person on the Library and Archives Canada census search page http://central.bac-lac.gc.ca/.redirect?app=census&id=40521746&lang=eng . While FamilySearch unfortunately doesn't provide images for this census you can confirm that the page, line, microfilm reel etc. all match. It's the same entry, only LAC places it in Ontario, not Nova Scotia.
Or, I suppose this could be really simple like FamilySearch simply attached the wrong province to a bunch of census pages (in which case the location normalization did the best it could given faulty information).