Under development...
Here is country by country information on topics such as the data source and quality. General methods will be described here.
In the geodatabase (for all countries combined) there is a table called "att_0". This table has some documentation of the sources of some of these data.
Afghanistan, Åland Islands, Albania, Algeria, American Samoa, Andorra, Angola, Anguilla, Antarctica, Antigua and Barbuda, Argentina, Armenia, Aruba, Australia, Austria, Azerbaijan
Bahamas, Bahrain, Bangladesh, Barbados, Belarus, Belgium, Belize, Benin, Bermuda, Bhutan, Bolivia, Bosnia and Herzegovina, Botswana, Bouvet Island, Brazil, British Indian Ocean Territory, British Virgin Islands, Brunei Darussalam, Bulgaria, Burkina Faso, Burundi
Cambodia, Cameroon, Canada, Cape Verde, Cayman Islands, Central African Republic, Chad, Chile, China, Christmas Island, Cocos Islands, Colombia, Comoros, Cook Islands, Costa Rica, Côte d'Ivoire, Croatia, Cuba, Cyprus, Czech Republic
Democratic Republic of the Congo, Denmark, Djibouti, Dominica, Dominican Republic
Ecuador, Egypt, El Salvador, Equatorial Guinea, Eritrea, Estonia, Ethiopia
Falkland Islands, Faroe Islands, Fiji, Finland, France, French Guiana, French Polynesia, French Southern Territories
Gabon, Gambia, Georgia, Germany, Ghana, Gibraltar, Greece, Greenland, Grenada, Guadeloupe, Guam, Guatemala, Guernsey, Guinea, Guinea-Bissau, Guyana
Haiti, Heard Island and McDonald Islands, Honduras, Hongkong, Hungary
Iceland, India, Indonesia, Iran, Iraq, Ireland, Isle of Man, Israel, Italy
Jamaica, Japan, Jersey, Jordan
Kazakhstan, Kenya, Kiribati, Kuwait, Kyrgyzstan
Laos, Latvia, Lebanon, Lesotho, Liberia, Libya, Liechtenstein, Lithuania, Luxembourg
Macao, Macedonia, Madagascar, Malawi, Malaysia, Maldives, Mali, Malta, Marshall Islands, Martinique, Mauritania, Mauritius, Mayotte, Mexico, Micronesia, Moldova, Monaco, Mongolia, Montenegro, Montserrat, Morocco, Mozambique, Myanmar
Namibia, Nauru, Nepal, Netherlands, Netherlands Antilles, New Caledonia, New Zealand, Nicaragua, Niger, Nigeria, Niue, Norfolk Island, North Korea, Northern Mariana Islands, Norway
Pakistan, Palau, Palestina, Panama, Papua New Guinea, Paraguay, Peru, Philippines, Pitcairn Islands, Poland, Portugal, Puerto Rico
Republic of Congo, Reunion, Romania, Russian Federation, Rwanda
Saint Helena, Saint Kitts and Nevis, Saint Pierre and Miquelon, Saint Vincent and the Grenadines, Samoa, San Marino, Santa Lucia, São Tome and Principe, Saudi Arabia, Senegal, Serbia, Seychelles, Sierra Leone, Singapore, Slovakia, Slovenia, Solomon Islands, Somalia, South Africa, South Georgia and the South Sandwich Islands, South Korea, Spain, Sri Lanka, Sudan, Suriname, Svalbard and Jan Mayen, Swaziland, Sweden, Switzerland, Syria
Taiwan, Tajikistan, Tanzania, Thailand, Timor-Leste, Togo, Tokelau, Tonga, Trinidad and Tobago, Tunisia, Turkey, Turkmenistan, Turks and Caicos Islands, Tuvalu
Uganda, Ukraine, United Arab Emirates, United Kingdom, United States, United States Minor Outlying Island, Uruguay, Uzbekistan
Vanuatu, Vatican, Venezuela, Vietnam, Virgin Islands (U.S.)
Wallis and Futuna, Western Sahara
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