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#' @title Typology Layer
#' @name typoLayer
#' @description Plot a typology layer.
#' @param x an sf object, a simple feature collection. If x is used then spdf, df, spdfid and dfid are not.
#' @param spdf a SpatialPolygonsDataFrame.
#' @param df a data frame that contains the values to plot. If df is missing
#' spdf@data is used instead.
#' @param spdfid name of the identifier variable in spdf, default to the first column
#' of the spdf data frame. (optional)
#' @param dfid name of the identifier variable in df, default to the first column
#' of df. (optional)
#' @param var name of the variable to plot.
#' @param col a vector of colors.
#' @param border color of the polygons borders.
#' @param lwd borders width.
#' @param legend.pos position of the legend, one of "topleft", "top",
#' "topright", "right", "bottomright", "bottom", "bottomleft", "left" or a
#' vector of two coordinates in map units (c(x, y)). If
#' legend.pos is "n" then the legend is not plotted.
#' @param legend.title.txt title of the legend.
#' @param legend.title.cex size of the legend title.
#' @param legend.values.cex size of the values in the legend.
#' @param legend.values.order values order in the legend, a character vector
#' that matches var modalities. Colors will be affected following this order.
#' @param legend.frame whether to add a frame to the legend (TRUE) or
#' not (FALSE).
#' @param legend.nodata no data label.
#' @param colNA no data color.
#' @param add whether to add the layer to an existing plot (TRUE) or
#' not (FALSE).
#' @seealso \link{propSymbolsTypoLayer}, \link{typoLayer}, \link{legendTypo}
#' @export
#' @examples
#' library(sf)
#' mtq <- st_read(system.file("gpkg/mtq.gpkg", package="cartography"))
#' typoLayer(x = mtq, var="STATUS",
#' col = c("aquamarine4", "yellow3","wheat"),
#' legend.values.order = c("Prefecture",
#' "Sub-prefecture",
#' "Simple municipality"),
#' legend.pos = "topright",
#' legend.title.txt = "Status")
#' layoutLayer(title = "Municipality Status")
typoLayer <- function(x, spdf, df, spdfid = NULL, dfid = NULL, var,
col = NULL, border = "grey20", lwd = 1,
colNA = "white",
legend.pos = "bottomleft",
legend.title.txt = var,
legend.title.cex = 0.8,
legend.values.cex = 0.6,
legend.values.order = NULL,
legend.nodata = "no data",
legend.frame = FALSE,
add = FALSE)
{
if (missing(x)){
x <- convertToSf(spdf = spdf, df = df, spdfid = spdfid, dfid = dfid)
}
# modalities
mod <- unique(x[[var]])
mod <- mod[!is.na(mod)]
# check nb col vs nb mod
col <- checkCol(col, mod)
# check legend.values.order vs mod values
legend.values.order <- checkOrder(legend.values.order, mod)
# get the colors
refcol <- data.frame(mod = legend.values.order,
col = col[1:length(legend.values.order)],
stringsAsFactors = FALSE)
colvec <- refcol[match(x[[var]], refcol[,1]),2]
# for NA values
nodata <- FALSE
if(max(is.na(x[[var]]) > 0)){
nodata <- TRUE
colvec[is.na(colvec)] <- colNA
}
# plot
if(max(class(sf::st_geometry(x)) %in% c("sfc_MULTILINESTRING"))==1){
plot(sf::st_geometry(x), col = colvec, lwd = lwd, add = add)
}else{
plot(sf::st_geometry(x), col = colvec, border = border, lwd = lwd,
add = add)
}
legendTypo(pos = legend.pos, title.txt = legend.title.txt,
title.cex = legend.title.cex, values.cex = legend.values.cex,
categ = refcol[,1],
col = refcol[,2],
frame = legend.frame,
symbol="box",
nodata = nodata,
nodata.col = colNA,
nodata.txt = legend.nodata)
}
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