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Continue to Chat「Googleマップが劣化した」不満の声が相次ぐ ゼンリンとの契約解除で日本地図データを自社製に変更か - ITmedia NEWS https://blog.40ch.net/2019/03/22/complaining-voices-that-the-google-map-has-deteriorated-one-after-another-does-japanese-map-data-change-to-in-house-production-by-cancellation-of-contract-with-zenrin/