羅針儀海図
1. Portolan chartPortolan charts are navigational maps based on compass directions and estimated distances observed by the pilots at sea. They were first made in the 13th century in Italy and later in Spain. With the advent of the Age of Discovery, they were considered State secrets in Portugal and Spain. They were very valuable in the description of Atlantic and Indian coastlines for newcomer English and Dutch raiding, and later trading, ships.
Read “Portolan chart” on English Wikipedia
Read “羅針儀海図” on Japanese Wikipedia
Read “Portolan chart” on DBpedia
Read “Portolan chart” on English Wikipedia
Read “羅針儀海図” on Japanese Wikipedia
Read “Portolan chart” on DBpedia
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