We need to get map files (which can be done from http://gadm.org). The following map is Canadian administrative map. Similarly we can get map for other countries, even less well known. We can download from the website (gadm.org/country) and select file format to R (spartialpolygonsdataframe). Then read the downloaded Rdata file or directly from website using url like the following example (you need to know the name of Rdata file - usually country code followed by level of details)
require(maps)
require(maptools)
library(RColorBrewer)
library(sp)
# get the map; may need sometime to be loaded
con <- url("http://gadm.org/data/rda/CAN_adm1.RData")
print(load(con))
close(con)
# from your data file working directory
## load ("CAN_adm1.RData")
# data
gadm$NAME_1 # will display name of province in order.
# data to be plotted
value <- c(45, 15,8, 400, 300,120,22,10, 50,13,0,4,0)
gadm$value <- value
plotd <- gadm$value
# plotting
# color brewing
# we want nine color in yellow orange and red
ncolor <- 9
plotclr <- brewer.pal(ncolor,"YlOrRd")# brew new color
# we want to make classes out of the data, install package classInt
require(classInt)
class <- classIntervals(plotd, ncolor, style="quantile")
colcode <- findColours(class, plotclr)
# plotting map
spplot(gadm, "value", col.regions=plotclr, at=round(class$brks, digits=1), main="Canada map with var plotted" )
| List of countries Afghanistan |
| Albania |
| Algeria |
| American Samoa |
| Andorra |
| Angola |
| Anguilla |
| Antigua and Barbuda |
| Argentina |
| Armenia |
| Aruba |
| Australia |
| Austria |
| Azerbaijan |
| Bahamas |
| Bahrain |
| Bangladesh |
| Barbados |
| Belarus |
| Belgium |
| Belize |
| Benin |
| Bermuda |
| Bhutan |
| Bolivia |
| Bosnia-Herzegovina |
| Botswana |
| Bouvet Island |
| Brazil |
| Brunei |
| Bulgaria |
| Burkina Faso |
| Burundi |
| Cambodia |
| Cameroon |
| Canada |
| Cape Verde |
| Cayman Islands |
| Central African Republic |
| Chad |
| Chile |
| China |
| Christmas Island |
| Cocos (Keeling) Islands |
| Colombia |
| Comoros |
| Congo, Democratic Republic of the (Zaire) |
| Congo, Republic of |
| Cook Islands |
| Costa Rica |
| Croatia |
| Cuba |
| Cyprus |
| Czech Republic |
| Denmark |
| Djibouti |
| Dominica |
| Dominican Republic |
| Ecuador |
| Egypt |
| El Salvador |
| Equatorial Guinea |
| Eritrea |
| Estonia |
| Ethiopia |
| Falkland Islands |
| Faroe Islands |
| Fiji |
| Finland |
| France |
| French Guiana |
| Gabon |
| Gambia |
| Georgia |
| Germany |
| Ghana |
| Gibraltar |
| Greece |
| Greenland |
| Grenada |
| Guadeloupe (French) |
| Guam (USA) |
| Guatemala |
| Guinea |
| Guinea Bissau |
| Guyana |
| Haiti |
| Holy See |
| Honduras |
| Hong Kong |
| Hungary |
| Iceland |
| India |
| Indonesia |
| Iran |
| Iraq |
| Ireland |
| Israel |
| Italy |
| Ivory Coast (Cote D`Ivoire) |
| Jamaica |
| Japan |
| Jordan |
| Kazakhstan |
| Kenya |
| Kiribati |
| Kuwait |
| Kyrgyzstan |
| Laos |
| Latvia |
| Lebanon |
| Lesotho |
| Liberia |
| Libya |
| Liechtenstein |
| Lithuania |
| Luxembourg |
| Macau |
| Macedonia |
| Madagascar |
| Malawi |
| Malaysia |
| Maldives |
| Mali |
| Malta |
| Marshall Islands |
| Martinique (French) |
| Mauritania |
| Mauritius |
| Mayotte |
| Mexico |
| Micronesia |
| Moldova |
| Monaco |
| Mongolia |
| Montenegro |
| Montserrat |
| Morocco |
| Mozambique |
| Myanmar |
| Namibia |
| Nauru |
| Nepal |
| Netherlands |
| Netherlands Antilles |
| New Caledonia (French) |
| New Zealand |
| Nicaragua |
| Niger |
| Nigeria |
| Niue |
| Norfolk Island |
| North Korea |
| Northern Mariana Islands |
| Norway |
| Oman |
| Pakistan |
| Palau |
| Panama |
| Papua New Guinea |
| Paraguay |
| Peru |
| Philippines |
| Pitcairn Island |
| Poland |
| Polynesia (French) |
| Portugal |
| Puerto Rico |
| Qatar |
| Reunion |
| Romania |
| Russia |
| Rwanda |
| Saint Helena |
| Saint Kitts and Nevis |
| Saint Lucia |
| Saint Pierre and Miquelon |
| Saint Vincent and Grenadines |
| Samoa |
| San Marino |
| Sao Tome and Principe |
| Saudi Arabia |
| Senegal |
| Serbia |
| Seychelles |
| Sierra Leone |
| Singapore |
| Slovakia |
| Slovenia |
| Solomon Islands |
| Somalia |
| South Africa |
| South Georgia and South Sandwich Islands |
| South Korea |
| Spain |
| Sri Lanka |
| Sudan |
| Suriname |
| Svalbard and Jan Mayen Islands |
| Swaziland |
| Sweden |
| Switzerland |
| Syria |
| Taiwan |
| Tajikistan |
| Tanzania |
| Thailand |
| Timor-Leste (East Timor) |
| Togo |
| Tokelau |
| Tonga |
| Trinidad and Tobago |
| Tunisia |
| Turkey |
| Turkmenistan |
| Turks and Caicos Islands |
| Tuvalu |
| Uganda |
| Ukraine |
| United Arab Emirates |
| United Kingdom |
| United States |
| Uruguay |
| Uzbekistan |
| Vanuatu |
| Venezuela |
| Vietnam |
| Virgin Islands |
| Wallis and Futuna Islands |
| Yemen |
| Zambia |
| Zimbabwe |
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