Historical Topographic Maps - Preserving the Past | U.S. Geological Survey

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[hfu]

米国地形図は縦長であり1:24,000であった（のだっけ）。（Google が来る前に）旧版地形図をスキャンして無償公開してしまおうプロジェクト。

[Yusuke_S]

にほんにも、あると、いいなぁ。旧版地形図のリストを眺めつつ・・

[nilab]

The National Map: Historical Topographic Map Collection