Map - get URL(s) that would display map(s) on maps.google.com
Source:R/map_google.R
      url_map_google.RdMap - get URL(s) that would display map(s) on maps.google.com
Arguments
- lat
 Anything that can be handled by
sitepoints_from_any(). Leave unspecified to interactively browse to a .xlsx file that has lat,lon columns, or lat can be a data.frame with lat,lon column names in which case longitude should not be provided, such aslat = testpoints_10[1,], or lat and lon can be separately provided as vectors.
- lon
 longitude, or omit this parameter to provide points as the first parameter.
- zoom
 zoomed out value could be 3 or 5, zoomed in default is 12
- point
 logical, if TRUE, URL will have a marker at the point and zoom parameter is ignored. Otherwise just the map.