Setting up a google maps API key (for use in ggmap)
SetupyourAPIkey·SearchforEnvironmentVariablesinthesystemsettings·EditeitherUservariables(forcurrentuser)orSystemvariables(forall ...,ThekeyStringmapstotheAPIkeyfieldintheGoogleCloudconsole.YoucancalltheGetKeyStringmethodtogetthekeyStringforanAPIk...。參考影片的文章的如下: