What is the difference between source=survey and source=local_knowledge?
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survey means you physically went to the location and saw this firsthand.
local_knowledge means you’re familiar with this area (you live/work nearby, visit regularly, etc.) and so know the information firsthand, or from other people.
See Key:source - OpenStreetMap Wiki for details.
For example, if I mapped a playground as having a swing, I’d set the source to:
surveyif I actually went there and saw the swinglocal_knowledgeif I’ve been there before/been past the playground and recall seeing a swing, or if someone told me there’s a swing there.
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You can also use local_knowledge for “that’s how things are done around here”. For example, you might know that there’s no such thing as a living_street in your area, or that fire hydrants are always of the “pillar” type.
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Another couple of versions of “local knowledge” that have been mentioned before:
info (opening hours, phone number, URL etc) that you got from the business’s website;
something that you heard / read about - a real estate / advertising brochure, news report etc that gives mappable details
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If you’ve used the facility, it’s definitely a “survey,” but it’s difficult to distinguish if you’ve just passed by and seen it. My personal standard is that if I remember a certain date and time, it’s a “survey.” If I’ve passed by and seen it but can’t remember the specific date and time, it’s “local knowledge.”
The reply mentions using websites to verify factual information, but it might be helpful to add “website” or “official website” to make it clearer.
その施設を利用した時は間違いなく"survey"ですが、目の前を通過して目視した場合の区別が難しいですよね。
私の個人的な基準として、何月何日何時に通ったと記憶しているならば"survey"で、通って目視しても具体的な日時まで記憶にないものは"local knowledge"にしています。
返信で挙げられている、ウェブサイトを使った事実情報の確認は、より明確に"website"か"official website"を追加するのが有益かもしれません。
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