I am trying to make a map with my own borders of bounding box. But so far I failed every time.
First I tried to do it with function get_map. Here I found that I need to specify source = "osm". My code had been
 my_map<-get_map(location=c(-15, 30, 15, 85), source="osm")
but I recieved an error
 Error: map grabbing failed - see details in ?get_openstreetmap.
 In addition: Warning message:
 In download.file(url, destfile = destfile, quiet = !messaging, mode = "wb")      :
   cannot open: HTTP status was '0 (nil)'`
Than I tried using get_openstreetmap. My code was
  get_openstreetmap(bbox = c(left = -15.00000, bottom = 29.38048, right = 15.00000,
  top=85.00000, scale=606250))
but again I got an error
 Error: bounding box improperly specified.  see ?get_openstreetmap
Although I read both ?get_openstreetmap and ?get_map I dont know what I am doing wrong. Can anyone help me? Please consider that after getting a map I will need to add some points on it, so just url isn't enough for me.
Thx a lot!
 
     
    