Old Maps Online Logo – Explore Historical MapsOld Maps Online Logo – Explore Historical Maps

帮助

Requirements for map collections

返回帮助中心已发布: July 15, 2020
  1. High-resolution scans of old maps (300 DPI, or at least 2 Mpix)
  2. Maps in a zoomable viewer, available online without payments or passwords
  3. Each map has its own permanent URL, taking users directly to the viewer
  4. Coordinates for the corners of each map

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