我以前用过这个,每次都有效:
library("ggmap")
newmap2<-get_openstreetmap(bbox = c(left = -71.2612362452596,
bottom = 42.3308503846824, right = -71.0475647202879,
top = 42.4560226746649), scale=80000)
现在,我只能得到以下错误信息:
在download.file(url, destfile = destfile, quiet = !messaging, mode = "wb")中: URL 'http://tile.openstreetmap.org/cgi-bin/export?bbox=-71.2612362452596,42.3308503846824,-71.0475647202879,42.4560226746649&scale=80000&format=png':状态为“400 Bad Request”
我使用了来自CRAN的ggmap v.2.6.1和来自GITHUB的v.2.7。需要任何帮助。G