Auxilary Cartographic Functions in R: North Arrow, Scale Bar, and Label with Leader Arrow

Susumu Tanimura, Chusi Kuroiwa, Tsutomu Mizota

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Auxiliary cartographic components such as a scale bar, a north arrow, and labels frequently play an important role in faciliating the use of maps. Since the current R environment does not fully support these tools, we developed a scale bar for a projected map, a north arrow, and interactive text labeling with a leader arrow. The functionalities of the developed codes and noteworthy points during the execution of these functions are discussed.

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