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並前往https://gis.stackexchange.com/questions/291834/geom-line-does-not-plot-points-from-a-shapefile-in-its-correct-order

geom_line() does not plot points from a shapefile in its correct ...

library(rgdal) library(ggplot2) areas <- readOGR('.', 'areas') ggplot(fortify(areas)) + geom_path(aes(long, lat, group = group)).

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