Packages suggested but not available for checking: 'maptools', 'rgdal'
Packages suggested but not available for checking: 'maptools', 'rgdal'
Packages suggested but not available for checking: 'maptools', 'rgdal'
Packages suggested but not available for checking: 'maptools', 'rgdal'
Packages suggested but not available for checking: 'maptools', 'rgdal'
Packages suggested but not available for checking: 'maptools', 'rgdal'