使用R在Google地图上应用坐标点 [英] Applying coordinates points on google map using R
本文介绍了使用R在Google地图上应用坐标点的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
require(ggplot2)
require(ggmap)
require(maps)
require(mapproj)
require(mapdata)
require(rgeos)
require(maptools)
require(sp)
require(raster)
require(rgdal)
require(dismo)
require(tmp)
####
swf1 <- read.csv("D:/jamal project/swf1.csv",header=TRUE)
head(swf1)
Lon Lat
1 46.60638 24.88843
2 39.57275 21.39170
3 39.63389 24.43904
4 46.73168 24.64144
5 46.77773 24.73872
6 43.98056 26.33847
#i try using ggmap’s make_bbox function
swfp <- make_bbox(lon = swf$lon, lat = swf$lat, f = .1)
swfp
###i got this messg
Warning messages:
1: In min(x, na.rm = na.rm) :
no non-missing arguments to min; returning Inf
2: In max(x, na.rm = na.rm) :
no non-missing arguments to max; returning -Inf
3: In min(x, na.rm = na.rm) :
no non-missing arguments to min; returning Inf
4: In max(x, na.rm = na.rm) :
no non-missing arguments to max; returning -Inf
> swfp
left bottom right top
-Inf -Inf Inf Inf
问题是,我现在不知道如何添加我的点数,我想为每个区域选择一种颜色。
有人能帮我继续做下去吗?
我尝试的另一个选项是:
# loading the required packages
library(ggplot2)
library(ggmap)
# creating a sample data.frame with your lat/lon points
lon <- c(-38.31,-35.5)
lat <- c(40.96, 37.5)
df <- as.data.frame(cbind(lon,lat))
# getting the map
mapgilbert <- get_map(location = c(lon = mean(df$lon), lat = mean(df$lat)),
zoom = 4,
maptype = "satellite", scale = 2)
# plotting the map with some points on it
ggmap(mapgilbert) +
geom_point(data = df, aes(x = lon, y = lat, fill = "red", alpha = 0.8), size =
5, shape = 21) +
guides(fill=FALSE, alpha=FALSE, size=FALSE)
当我运行它时,我得到了这个 下载文件时出错(url,目标文件=tMP,Quiet=!Messaging,模式="wb"): 无法打开URL‘http://maps.googleapis.com/maps/api/staticmap?center=39.23,-36.905&zoom=4&size=640x640&scale=2&maptype=satellite&language=en-EN&sensor=false’ 此外:警告消息: 在DOWNLOAD.FILE(url,目标文件=tMP,Quiet=!Messaging,模式="wb")中: 无法打开URL‘http://maps.googleapis.com/maps/api/staticmap?center=39.23,-36.905&zoom=4&size=640x640&scale=2&maptype=satellite&language=en-EN&sensor=false’:HTTP状态为‘403禁止’
请帮助坐标文件HERE试试... 谢谢您推荐答案
以下是使用library(googleway)
library(googleway)
set_key( "API_KEY" )
swf1 <- read.table(text='
Lon Lat
1 46.60638 24.88843
2 39.57275 21.39170
3 39.63389 24.43904
4 46.73168 24.64144
5 46.77773 24.73872
6 43.98056 26.33847')
## you've asked for colours and sizes, so I'm making some random values which you can use in the plot
swf1$region <- sample(c("a","b"), size = nrow(swf1), replace = T)
swf1$size <- sample(50000:100000, size = nrow(swf1))
google_map() %>%
add_circles(
data = swf1, lon = "Lon", lat = "Lat", fill_colour = "region", radius = "size"
)
要获得卫星视图,请按地图上的‘卫星’按钮
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