我正在尝试使用RgoogleMaps制作地图。今天早上我的代码还能用,但现在我遇到了这个错误:
map.lyon <- GetMap(center=c(45.77338,4.856039), zoom = 15, destfile = "tile1.png", maptype = "mobile")
Error in download.file(url, destfile, mode = "wb", quiet = TRUE) :
cannot open URL 'http://maps.google.com/maps/api/staticmap?center=45.77338,4.856039&zoom=15&size=640x640&maptype=mobile&format=png32&sensor=true'
In addition: Warning message:
In download.file(url, destfile, mode = "wb", quiet = TRUE) :
cannot open: HTTP status was '403 Forbidden'
今天早上我做了很多地图(大概200个),Google Maps API的请求是否有限制?
我还尝试使用OpenStreetMaps代替Google Maps,仍然使用RgoogleMaps包,但这也不起作用(虽然只是在网站上找到的一个简单的代码示例),错误非常相似,以下是代码:
library(RgoogleMaps)
lat_c<-51.47393
lon_c<-7.22667
bb<-qbbox(lat = c(lat_c[1]+0.01, lat_c[1]-0.01), lon = c(lon_c[1]+0.03, lon_c[1]-0.03))
OSM.map<-GetMap.OSM(lonR=bb$lonR, latR=bb$latR, scale = 20000, destfile="bochum.png")
以下是运行时的输出结果:
> library(RgoogleMaps)
> lat_c<-51.47393
> lon_c<-7.22667
> bb<-qbbox(lat = c(lat_c[1]+0.01, lat_c[1]-0.01), lon = c(lon_c[1]+0.03, lon_c[1]-0.03))
> OSM.map<-GetMap.OSM(lonR=bb$lonR, latR=bb$latR, scale = 20000, destfile="bochum.png")
[1] "http://tile.openstreetmap.org/cgi-bin/export?bbox=7.19637,51.46383,7.25697,51.48403&scale=20000&format=png"
trying URL 'http://tile.openstreetmap.org/cgi-bin/export?bbox=7.19637,51.46383,7.25697,51.48403&scale=20000&format=png'
Error in download.file(url, destfile, mode = "wb", quiet = FALSE) :
cannot open URL 'http://tile.openstreetmap.org/cgi-bin/export?bbox=7.19637,51.46383,7.25697,51.48403&scale=20000&format=png'
In addition: Warning message:
In download.file(url, destfile, mode = "wb", quiet = FALSE) :
cannot open: HTTP status was '403 Forbidden'
我不明白问题出在哪里。有没有其他的包可以使用?基本上,我只需要在地图上放置主要城市和道路的背景,并能够在其上绘制点。
谢谢您的时间。