The rare 14th-century portolan chart is worth $7.5 million. Robert Gauthier / Los Angeles Times / Getty Images Last fall, Christie’s auctioned off a “highly unusual” nautical map as part of an estate ...

How to use the Geography data type to quickly add a map chart in Excel Your email has been sent Most will agree that a picture is worth a thousand words, and where geographical data is concerned, it’s ...

Global cartography leader C-MAP is set to introduce a new series of map products for boaters. The new U.S. mapping products — C-MAP Insight Pro and C-MAP Lake Insight HD — combine the trusted chart ...