记录使用R语言+ggplot绘制地图

setwd("D:/projects/0605")
# Load packages
library(sp)
library(mapproj)
library(maptools)
library(ggplot2)
library(maptools)
library(maps)
library(sf)
library(ggspatial)
library(scales)
library(cowplot)
fun.generate_random_points <- function(center, radius, count) {
    x <- center
    y <- center[1]
    xs <- runif(count, x, radius * x * sin(runif(1, 0, 360)))
    ys <- runif(count, y, radius * y * cos(runif(1, 0, 360)))
    print(xs)
    print(ys)
    points <- array(c(xs, ys), dim = c(2, count))
    return(points)
}

fun.draw <- function(data, layers, color, fillField, stroke, size, lineWith, lineType, pointShape, alpha, scale_position, north_position, chart_color) {
    # 初始化绘图
    g <- ggplot()
    # 柱狀圖
    g_bar <- ggplot()
    # 循环背景图层
    for (layer in layers) {
        # 读取背景图层信息
        lyr_data <- st_read(layer)
        g <- g + geom_sf(data = lyr_data, )
    }
    # 点图层
    point_lyr <- st_read(data)
    # 获取purchase字段列数据
    purchase_list <- point_lyr$PURCHASE
    # 最大值
    max_value <- max(as.vector(purchase_list), na.rm = TRUE)
    # 最小值
    min_value <- min(purchase_list)
    # 差值
    diff <- max_value - min_value
    # 分级数
    breaks <- c()
    # 各级计数
    counts <- c()
    i <- 0
    # 计算级别,分10级
    while (i < 10) {
        breaks <- c(breaks, (diff / 10) * i)
        counts <- c(counts, 0)
        i <- i + 1
    }
    counts <- list(counts)
    print(counts[[1]][0])
    # 各级别计数
    for (j in purchase_list) {
        temp <- 0
        for (n in breaks) {
            temp <- temp + 1
            if (j <= n) {
                counts[[1]][temp] <- counts[[1]][temp] + 1
            }
        }
    }
    # list转向量数组
    counts <- as.numeric(unlist(counts))
    print(breaks)
    print(counts)
    # 创建柱状条数据
    bar_data <- data.frame(breaks, counts)


    # point_lyr <- fortify(point_lyr)
    # 绘制比例尺
    g <- g + annotation_scale(location = scale_position) +
        # spatial-aware automagic north arrow
        annotation_north_arrow(
            location = north_position, which_north = "false",
            style = north_arrow_fancy_orienteering
        )
    #设置颜色 
    if (is.list(color)) {
        g <- g + geom_sf(
            data = point_lyr, aes(fill = PURCHASE, size = size, alpha = alpha),
            shape = pointShape, stroke = stroke,
            size = size
        ) + scale_fill_gradient(low = color[1], high = color[2])
    } else {
        g <- g + geom_sf(
            data = point_lyr, aes(size = size, fill = color, alpha = alpha),
            size = size,
            shape = pointShape, stroke = stroke
        )
    }
    #绘制柱状图
    g_bar <- ggplot(data = bar_data, mapping = aes(
        x = breaks, y = counts,
        fill = "#413a00"
    )) +
        geom_bar(stat = "identity")
    gg <- ggdraw() +
        draw_plot(g, 0, 0.5, 1, 0.5) + draw_plot(g_bar, 0, 0, 1, 0.5)
    #输出图形，不打印可能无法输出图形 
    print(gg)
}
data <- "Data/LNHP3.shp"
layers <- c("Data/LN_bou_p1.shp", "Data/LN_bou_p2.shp")
color <- list("green", "red")
print(color[1])
# 运行函数
# north_poisition scale_position tl,tr,bl,br
fun.draw(data, layers, color, "PURCHASE", pointShape = 21, .25, size = 3, alpha = 0.75, north_position = "tl", scale_position = "bl")

效果