#photo metadata
WhatsApp は写真から位置情報を削除するのか
A photo sent the ordinary way arrives without its coordinates. The identical file sent as a document arrives with them intact. Here is the evidence for each, and the popular claims that cannot be sourced at all.
編集できる写真メタデータのタグ：何を変更できるのか、その理由
A photo carries three blocks of metadata and most of two of them are yours to change. Here is the working subset: each tag, what it holds, why you would touch it, and what reads it.
パソコンで写真にジオタグを付ける方法（ソフト不要）
Windows will show a photo's location but will not let you add one, and the Mac Photos app can accept a location that never reaches the exported file. Here is what each actually does, and the browser route that avoids both.
Google Business Profile 用写真のジオタグ設定方法
Google's photo uploader has no location field, so a geotag has to go into the file before it leaves your computer. Here is how to put it there, and what three published tests say it will and will not do.