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.
EXIFとメタデータのガイド
カメラのEXIFメタデータ、IPTCタグ、画像の著作権情報を詳しく解説します。
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ジオタグとは？位置情報を持つ写真の裏側にあるタグ
Geotagging is the act of storing a location inside a photo file itself. Here is exactly which EXIF tags hold it, and what happens to them when you upload.
写真からジオタグを削除する方法（そして確認する方法）
Several controls that look identical do completely different things, and one of them refuses to touch a camera-written location at all. Here is how to clear the location and confirm it is gone.
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.
写真ファイルから GPS 位置情報を取り出す方法
The coordinates are already inside the file. Here is how to read them out, why the number arrives without its minus sign, and which tags tell you whether the location is a measurement or a guess.