mapscale: A scale function to add beside a map

In kevinlzheng/statemaps: Collective Functions to Perform Generalized Linear Model Graphs

Usage

mapscale(x, y, relwidth = 0.15, metric = TRUE, ratio = TRUE,
  cols = rep(c("black", "white"), 10), cex = 0.8, projected = FALSE,
  epsg = 4326, inset = 0, mark = "Albers Equal Area Conic USGS version",
  madj = 0, ...)

Arguments

x	A geo-object,
y	a state abbrebriation, e.g. "CA",
relwidth	margin added to maps, \item metricif metric system is used? TRUE default \item ratiodefault = TRUE \item colsblack and white interval \item projectedif projection is used \item insetis for box into the plot margin \item markmark is the text line under the scale ba \item madjadjustment \item magmagnification default =1

Map scale was modified from the map package add scale to unprojected map if map has been projected, then use scale bar function, need to specify magnification for that. see Tanimura et al: auxiliary cartographic functions in R: North Arrow, Scale Bar, and label with a leader arrow the default ppi if not specified is 72 ppi/inch if px is specified, decimal degree is used to calculate actual distance map("usa") mapscale(x="bottomleft", relwidth = 0.2, mark ="", projected = F, ratio=F, inset = c(0.05, -0.05)) par(xpd =TRUE) plot(0:1,0:1) map("state", "ohio") mapscale(x="topleft", relwidth = 0.2,ratio=T) mapscale(x="topright", relwidth = 0.2,ratio=F) mapscale(x="bottomright", relwidth = 0.2,ratio=F) mapscale(x="bottomleft", relwidth = 0.2, projected =T, ratio=F) mapscale(x="center", relwidth = 0.2, projected =T, ratio=F) box() plot(us.states) mapscale(x="bottomright", relwidth = 0.2,ratio=F, projected =T, inset = c(0.1, 0.2)) mapscale(x="topright", relwidth = 0.2, ratio=F, projected =T, epsg = 2163, inset = c(0.1, 0.2))

kevinlzheng/statemaps documentation built on May 20, 2019, 1:56 p.m.