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Editorial Team
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Asked: 2026-06-18T14:08:21+00:00

I am using the map.scale function from the library(maps) to add a scale bar;

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I am using the map.scale function from the library(maps) to add a scale bar; however, it is very difficult to manipulate its position and dimensions, specially if I am working with different sites that required a scale bar to indicate their overall area.

Is there a quick way to insert a scale bar in a specific location of the plot (map)?

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1 Answer

  1. Editorial Team

    Modifying the grconvertX and grconvertY values should do it for you. 

    map.scale(grconvertX(0.5,"npc"), grconvertY(0.08, "npc"),col="#0000ffff", metric = FALSE, ratio=FALSE, relwidth=0.2)
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