从非highmap-collection地图中制作一个Choropleth [英] Make a choropleth from a non-highmap-collection map

问题描述

我一直在尝试使用highcharter包中的hcmap制作一个弦谱图；我从自己的shapefile中获取了多边形，因为它是不在highmap集合列表中的地图.

I've been trying to make a choropleth map with hcmap from highcharter package; I obtained the polygons from my own shapefile because it's a map that is not on the list of highmap's collection.

为此，首先，我设法将我的shapefile转换为GeoJson文件，如下所述: https://blog.exploratory.io/creating- geojson-out-of-shapefile-in-r-40bc0005857d

To do so, first I managed to transform my shapefile to a GeoJson file, as described here: https://blog.exploratory.io/creating-geojson-out-of-shapefile-in-r-40bc0005857d

稍后，我设法使用包geosonio绘制了地图，如下所示: http://jkunst.com/highcharter/highmaps.html#geojsonio-package

Later I managed to draw the map using the package geosonio as described here: http://jkunst.com/highcharter/highmaps.html#geojsonio-package

但是，我不知道如何将具有值的数据框合并到地图中绘制的多边形中.所有可用的示例都将合并为data.frame格式的mapdata，在转换为GeoJson时会丢失.

However, I can't figure out how to merge a dataframe with values into the polygons drawn in my map. All the examples availables are merging to mapdata that is in a data.frame format, which I lose when transforming to GeoJson.

到目前为止，这是我的代码:

Here's my code so far:

library(rgdal)
library(geojsonio)
library(highcharter)

#Get map from shapefile
Mymap <- readOGR(dsn="Mymap", "Mymap", verbose = FALSE) %>%  
                 spTransform(CRS("+proj=longlat +ellps=GRS80 +datum=WGS84"))

#Transform to geoJson
MymapJSON <- geojson_json(Mymap)

#Use geojsonio to make data compatible with hcmap
Myhcmap <- jsonlite::fromJSON(MymapJSON, simplifyVector = FALSE)
Myhcmap<- geojsonio::as.json(Myhcmap)

#Draw map:

highchart(type = "map") %>%
   hc_add_series(mapData = Myhcmap, showInLegend = T)

结果:

¿我如何将其他数据放入GeoJson中，以便画出一个圆度?

¿How can I put additional data into the GeoJson so I can draw a choropleth?

推荐答案

前段时间我终于找到了自己的解决方案，这相当简单，但是由于没有充分说明如何向GeoJSON添加数据，因此我将展示在这里:

I finally got to a solution by myself some time ago, it's was fairly simple but since it's not well documented how to add data to the GeoJSON, I will show it here:

#Work with the map until this step: 
Myhcmap <- jsonlite::fromJSON(MymapJSON, simplifyVector = FALSE)

#This part was unnecessary:
#Myhcmap<- geojsonio::as.json(Myhcmap)

#Then, write your map like this:

highchart() %>%
hc_add_series_map(Myhcmap, df, value = "value", joinBy = "ID")

位置:

df是要添加的数据框

value是您要为地图着色的数据的列名

value is the column name of the data you want to color your map by

joinBy是连接键变量

这篇关于从非highmap-collection地图中制作一个Choropleth的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！