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A rhumbline network (or windrose network) is a navigational aid consisting in multiple lines in a web-like grid drawn on portolan charts (and other early maps ). These nautical charts were used in the medieval age and age of exploration in marine navigation .
The Cantino planisphere focuses on coastlines and how they relate to compass directions as indicated by the lines that crisscross the surface, called rhumb lines. This visual language stems from portolan charts
A rhumb line appears as a straight line on a Mercator projection map. [1] The name is derived from Old French or Spanish respectively: "rumb" or "rumbo", a line on the chart which intersects all meridians at the same angle. [1]
Rhumb lines. Portolan charts are characterized by their rhumbline networks, which emanate out from compass roses located at various points on the map. The lines in these networks are generated by compass observations to show lines of constant bearing.
28 lip 2019 · First, Mercator figured out how to “flatten” the earth so one could draw a strait line (in navigation terms a rhumb line) on the chart. Second, he built on the work two Greek mathematicians – Erastothenes and Hipparchus – to draw lines of latitude and longitude on his new type of chart.
Abstract. Portolan charts taught mariners to rely on sailing charts and also left a legacy of geographic detail for later mapmakers. In their handbook of cartog
A rhumb line appears as a straight line on a Mercator projection map. Origin The name is derived from Old French or Spanish respectively: "rumb" or "rumbo", a line on the chart which intersects all meridians at the same angle.
