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Punti max Elevazione e Depressione

Flag Country or Region Highest Point Max Lowest Point Min Diff
Afghanistan Noshaq 7,492 m Amu Darya 258 m 7,234 m
Albania Maja e Korabit 2,764 m Adriatic Sea sea level 2,764 m
Algeria Mt Tahat 3,003 m Chott Melrhir -40 m 3,043 m
American Samoa Lata Mt onTa‘u 966 m South Pacific Oc sea level 966 m
Andorra Coma Pedrosa 2,942 m Valira River 840 m 2,102 m
Angola Morro de Môco 2,620 m South Atlantic Oc sea level 2,620 m
Anguilla Crocus Hill on Anguilla 65 m Caribbean Sea sea level 65 m
Antarctica Vinson Massif 4,892 m Southern Oc sea level 4,892 m
Antigua & Barbuda Mt Obama on Antigua 402 m Caribbean Sea sea level 402 m
Argentina Aconcagua 6,960 m Laguna del Carbón -105 m 7,065 m
Armenia Mt Aragats 4,090 m Debed 400 m 3,690 m
Aruba Mt Jamanota on Aruba 188 m Caribbean Sea sea level 188 m
Ascension Is Green Mt on Ascension Is 859 m South Atlantic Oc sea level 859 m
Ashmore & Cartier Is [] 3 m Indian Oc sea level 3 m
Australia Mt Kosciuszko 2,228 m Lake Eyre -15 m 2,243 m
Austria Großglockner 3,798 m Lake Neusiedl 115 m 3,683 m
Azerbaijan Bazarduzu Dagi 4,485 m Caspian Sea -28 m 4,513 m
Bahamas Mt Alvernia on Cat Is 63 m North Atlantic Oc sea level 63 m
Bahrain Jabal ad Dukhan 122 m Persian Gulf sea level 122 m
Bangladesh Mowdok Mual 1,052 m Bay of Bengal sea level 1,052 m
Barbados Mt Hillaby onBarbados 336 m North Atlantic Oc sea level 336 m
Belarus Dzyarzhynskaya Hara 346 m Neman 90 m 256 m
Belgium Signal de Botrange 694 m North Sea sea level 694 m
Belize Doyle's Delight 1,124 m Caribbean Sea sea level 1,124 m
Benin Mont Sokbaro 658 m Bight of Benin sea level 658 m
Bermuda Town Hill on Bermuda 76 m North Atlantic Oc sea level 76 m
Bhutan Gangkhar Puensum 7,570 m Drangme Chhu 97 m 7,473 m
Bolivia Sajama 6,542 m Rio Paraguay 90 m 6,452 m
Bosnia & Herzegovina Maglic 2,386 m Adriatic Sea sea level 2,386 m
Botswana Otse Hill 1,491 m Limpopo River & Shashe River 513 m 978 m
Bouvet Is Olav Peak on Bouvet Is 935 m South Atlantic Oc sea level 935 m
Brazil Pico da Neblina 2,994 m Atlantic Oc sea level 2,994 m
British Indian Oc Ter [] on Diego Garcia 15 m Indian Oc sea level 15 m
Brunei Bukit Pagon on Borneo 1,850 m South China Sea sea level 1,850 m
Bulgaria Musala 2,925 m Black Sea sea level 2,925 m
Burkina Faso Tena Kourou 749 m Black Volta 200 m 549 m
Burma Hkakabo Razi 5,881 m Indian Oc sea level 5,881 m
Burundi Mt Heha 2,684 m Lake Tanganyika 772 m 1,912 m
Cambodia Phnom Aural 1,810 m Gulf of Thailand sea level 1,810 m
Cameroon Mt Cameroon 4,040 m Bight of Bonny sea level 4,040 m
Canada Mt Logan 5,959 m North Atlantic Oc Arctic Oc North Pacific Oc sea level 5,959 m
Cape Verde Mt Fogo on Fogo 2,829 m North Atlantic Oc sea level 2,829 m
Cayman Is The Bluff on Cayman Brac 46 m Caribbean Sea sea level 46 m
Central African Republic Mont Ngaoui 1,420 m Ubangi River 335 m 1,085 m
Chad Emi Koussi 3,445 m Bodélé Depression 160 m 3,285 m
Chile Ojos del Salado 6,893 m S Pacific Oc sea level 6,893 m
China Mt Everest 8,848 m Aydingkol -154 m 9,002 m
Christmas Is Murray Hill on Christmas Is 361 m Indian Oc sea level 361 m
Clipperton Is Rocher Clipperton on Île de Clipperton 29 m North Pacific Oc sea level 29 m
Cocos (Keeling) Is [] 5 m Indian Oc sea level 5 m
Colombia Pico Cristóbal Colón Pico Simón Bolívar 5,700 m North Pacific Oc Caribbean Sea sea level 5,700 m
Comoros Mt Karthala on Grande Comore 2,360 m Indian Oc sea level 2,360 m
Congo Democratic Republic Margherita Peak 5,109 m South Atlantic Oc sea level 5,109 m
Congo Republic Mont Nabeba 1,020 m South Atlantic Oc sea level 1,020 m
Cook Is Te Manga on Rarotonga 652 m S Pacific Oc sea level 652 m
Coral Sea Is [] on Cato Is 29 m S Pacific Oc sea level 29 m
Costa Rica Cerro Chirripó 3,820 m North Pacific Oc Caribbean Sea sea level 3,820 m
Côte d'Ivoire Mont Nimba 1,752 m Gulf of Guinea sea level 1,752 m
Croatia Dinara 1,831 m Adriatic Sea sea level 1,831 m
Cuba Pico Turquino on Cuba 1,974 m Caribbean Sea sea level 1,974 m
Curaçao Christoffelberg on Curaçao 375 m Caribbean Sea sea level 375 m
Cyprus Mt Olympus on Cyprus 1,951 m Mediterranean Sea sea level 1,951 m
Czech Republic Snežka 1,602 m Elbe 115 m 1,487 m
Denmark Møllehøj 171 m Lammefjord -7 m 178 m
Djibouti Mousa Ali 2,028 m Lake Asal -155 m 2,183 m
Dominica Morne Diablotins on Dominica 1,447 m Caribbean Sea sea level 1,447 m
Dominican Republic Pico Duarte on Hispaniola 3,098 m Lago Enriquillo on Hispaniola -46 m 3,144 m
Ecuador Chimborazo 6,267 m Pacific Oc sea level 6,267 m
Egypt Mt Catherine 2,629 m Qattara Depression -133 m 2,762 m
El Salvador Cerro El Pital 2,730 m North Pacific Oc sea level 2,730 m
Equatorial Guinea Pico Basile on Bioko 3,008 m North Atlantic Oc sea level 3,008 m
Eritrea Emba Soira 3,018 m Lake Kulul -75 m 3,093 m
Estonia Suur Munamägi 318 m Baltic Sea sea level 318 m
Ethiopia Ras Dejen 4,550 m Danakil Depression -125 m 4,675 m
European Union Mont Blanc 4,810 m Lammefjord -7 m 4,817 m
Falkland Is Mt Usborne on East Falkland 705 m South Atlantic Oc sea level 705 m
Faroe Is Slættaratindur on Eysturoy 882 m North Atlantic Oc sea level 882 m
Fiji Tomanivi on Viti Levu 1,324 m S Pacific Oc sea level 1,324 m
Finland Halti 1,324 m Baltic Sea sea level 1,324 m
France Mont Blanc 4,810 m Delta du Rhône -2 m 4,812 m
French Guiana Bellevue de l'Inini 851 m North Atlantic Oc sea level 851 m
French Polynesia Mont Orohena on Tahiti 2,241 m S Pacific Oc sea level 2,241 m
French Southern Ter Mont Ross on Iles Kerguelen 1,850 m Indian Oc sea level 1,850 m
Gabon Mont Bengoué 1,070 m Atlantic Oc sea level 1,070 m
Gambia [] 53 m North Atlantic Oc sea level 53 m
Georgia Shkhara 5,201 m Black Sea sea level 5,201 m
Germany Zugspitze 2,962 m Neuendorf-Sachsenbande -4 m 2,966 m
Ghana Mt Afadjato 880 m Gulf of Guinea sea level 880 m
Gibraltar Rock of Gibraltar 426 m Strait of Gibraltar sea level 426 m
Greece Mt Olympus 2,919 m Mediterranean Sea sea level 2,919 m
Greenland Gunnbjørn Fjeld on Greenland 3,700 m Arctic Oc North Atlantic Oc sea level 3,700 m
Grenada Mt Saint Catherine on Grenada 840 m Caribbean Sea sea level 840 m
Guadeloupe La Grande Soufrière on Île de Basse-Terre 1,484 m Caribbean Sea sea level 1,484 m
Guam Mt Lamlam on Guam 406 m North Pacific Oc sea level 406 m
Guatemala Volcán Tajumulco 4,220 m North Pacific Oc Caribbean Sea sea level 4,220 m
Guernsey Le Moulin on Sark 114 m English Channel sea level 114 m
Guinea Mont Nimba 1,752 m North Atlantic Oc sea level 1,752 m
Guinea-Bissau [] in the northeast corner of the country 300 m North Atlantic Oc sea level 300 m
Guyana Mt Roraima 2,750 m North Atlantic Oc sea level 2,750 m
Haiti Pic la Selle on Hispaniola 2,680 m Caribbean Sea sea level 2,680 m
Heard Is & McDonald Is Mawson Peak on Heard Is 2,745 m Indian Oc sea level 2,745 m
Honduras Cerro Las Minas 2,870 m Caribbean Sea North Pacific Oc sea level 2,870 m
Hong Kong Tai Mo Shan 958 m South China Sea sea level 958 m
Hungary Kékes 1,014 m Tisza 76 m 938 m
Iceland Hvannadalshnúkur on Iceland 2,110 m North Atlantic Oc sea level 2,110 m
India Kangchenjunga 8,586 m Kuttanad -2 m 8,588 m
Indonesia Puncak Jaya on New Guinea 4,884 m Indian Oc S Pacific Oc sea level 4,884 m
Iran Damavand 5,610 m Caspian Sea -28 m 5,638 m
Iraq Cheekha Dar 3,611 m Persian Gulf sea level 3,611 m
Ireland Carrauntoohil on Ireland 1,038 m North Atlantic Oc sea level 1,038 m
Isle of Man Snaefell on the Isle of Man 621 m Irish Sea sea level 621 m
Israel Har Meron 1,208 m Dead Sea -422 m 1,630 m
Italy Monte Bianco 4,810 m Delta del Po -3 m 4,813 m
Jamaica Blue Mt Peak on Jamaica 2,256 m Caribbean Sea sea level 2,256 m
Jan Mayen Haakon VII Toppen 2,277 m Norwegian Sea sea level 2,277 m
Japan Mt Fuji on Honshu 3,776 m Hachiro-gata -4 m 3,780 m
Jersey Les Platons on Jersey 143 m English Channel sea level 143 m
Jordan Jabal Umm ad Dami 1,854 m Dead Sea -422 m 2,276 m
Kazakhstan Khan Tengri 7,010 m Karagiye Depression -132 m 7,142 m
Kenya Mt Kenya 5,199 m Indian Oc sea level 5,199 m
Kiribati [] on Banaba 81 m Pacific Oc sea level 81 m
Korea, North Paektu-san 2,744 m Sea of Japan Yellow Sea sea level 2,744 m
Korea, South Halla-san on Jejudo 1,950 m Sea of Japan Yellow Sea sea level 1,950 m
Kosovo Gjeravica 2,656 m White Drin 297 m 2,359 m
Kuwait [] 306 m Persian Gulf sea level 306 m
Kyrgyzstan Jengish Chokusu 7,439 m Kara Darya 132 m 7,307 m
Laos Phou Bia 2,817 m Mekong 70 m 2,747 m
Latvia Gaizinkalns 312 m Baltic Sea sea level 312 m
Lebanon Qurnat as Sawda' 3,088 m Mediterranean Sea sea level 3,088 m
Lesotho Thabana Ntlenyana 3,482 m Orange River & Makhaleng River 1,400 m 2,082 m
Liberia Mt Wuteve 1,440 m North Atlantic Oc sea level 1,440 m
Libya Bikku Bitti 2,267 m Sabkhat Ghuzayyil -47 m 2,314 m
Liechtenstein Grauspitz 2,599 m Rhine 430 m 2,169 m
Lithuania Aukštojas Hill 294 m Nemunas delta -1 m 295 m
Luxembourg Kneiff 560 m Moselle River 133 m 427 m
Macau Coloane Alto on Gau Ou Saan 172 m South China Sea sea level 172 m
Macedonia Golem Korab 2,764 m Vardar 50 m 2,714 m
Madagascar Maromokotro on Madagascar 2,876 m Indian Oc sea level 2,876 m
Malawi Mt Mulanje 3,002 m Shire River 37 m 2,965 m
Malaysia Gunung Kinabalu on Borneo 4,095 m South China Sea Indian Oc sea level 4,095 m
Maldives [] on Villingili 2 m Indian Oc sea level 2 m
Mali Hombori Tondo 1,155 m Senegal River 23 m 1,132 m
Malta Ta'Dmejrek on Malta Is 253 m Mediterranean Sea sea level 253 m
Marshall Is [] on Likiep 10 m North Pacific Oc sea level 10 m
Martinique Montagne Pelee on Martinique 1,397 m Caribbean Sea sea level 1,397 m
Mauritania Kediet ej Jill 915 m Sebkha de Ndrhamcha -5 m 920 m
Mauritius Piton de la Petite Rivière Noire on Mauritius 828 m Indian Oc sea level 828 m
Mayotte Benara on Mahoré 660 m Mozambique Channel sea level 660 m
Mexico Volcán Citlaltépetl (Pico de Orizaba) 5,636 m Laguna Salada -10 m 5,646 m
Micronesia Dolohmwar on Pohnpei 791 m North Pacific Oc sea level 791 m
Moldova Dealul Balanesti 430 m Dniester 2 m 428 m
Monaco along Chemin des Révoires on Mont Agel 161 m Mediterranean Sea sea level 161 m
Mongolia Khüiten Peak 4,374 m Hoh Nuur Depression 518 m 3,856 m
Montenegro Zla Kolata 2,534 m Adriatic Sea sea level 2,534 m
Montserrat Chances Peak on Montserrat 915 m Caribbean Sea sea level 915 m
Morocco Jbel Toubkal 4,165 m Sebjet Tah -55 m 4,220 m
Mozambique Monte Binga 2,436 m Mozambique Channel sea level 2,436 m
Namibia Konigstein 2,606 m South Atlantic Oc sea level 2,606 m
Nauru Command Ridge on Nauru 71 m S Pacific Oc sea level 71 m
Navassa Is [] on Navassa Is 77 m Caribbean Sea sea level 77 m
Nepal Mt Everest 8,848 m Kanchan Kalan 70 m 8,778 m
Netherlands Mt Scenery on Saba 877 m Zuidplaspolder -7 m 884 m
New Caledonia Mont Panié on New Caledonia 1,628 m Coral Sea sea level 1,628 m
New Zealand Aoraki/Mt Cook on South Is 3,754 m S Pacific Oc sea level 3,754 m
Nicaragua Mogoton 2,107 m North Pacific Oc Caribbean Sea sea level 2,107 m
Niger Mont Idoukal-n-Taghès 2,022 m Niger River 200 m 1,822 m
Nigeria Chappal Waddi 2,419 m [] on Lagos Is -0.2 m 2,419 m
Niue [] near Mutalau on Niue 68 m S Pacific Oc sea level 68 m
Norfolk Is Mt Bates on Norfolk Is 319 m S Pacific Oc sea level 319 m
Northern Mariana Is [] on Agrihan 965 m North Pacific Oc sea level 965 m
Norway Galdhøpiggen 2,469 m Norwegian Sea sea level 2,469 m
Oman Jabal Shams 2,980 m Arabian Sea sea level 2,980 m
Pakistan K2 8,611 m Arabian Sea sea level 8,611 m
Palau Mt Ngerchelchuus on Babeldaob 242 m North Pacific Oc sea level 242 m
Palestine Tall Asur 1,022 m Dead Sea -422 m 1,444 m
Panama Volcán Barú 3,475 m North Pacific Oc Caribbean Sea sea level 3,475 m
Papua New Guinea Mt Wilhelm 4,509 m S Pacific Oc sea level 4,509 m
Paraguay Cerro Peró 842 m Rio Paraguay 46 m 796 m
Peru Huascarán 6,768 m S Pacific Oc sea level 6,768 m
Philippines Mt Apo on Mindanao 2,954 m Philippine Sea South China Sea sea level 2,954 m
Pitcairn Is Pawala Valley Ridge on Pitcairn Is 347 m S Pacific Oc sea level 347 m
Poland Northwestern peak of Rysy 2,499 m Zulawy Wislane -2 m 2,501 m
Portugal Ponta do Pico on Pico Is 2,351 m North Atlantic Oc sea level 2,351 m
Puerto Rico Cerro de Punta on Puerto Rico 1,338 m Caribbean Sea sea level 1,338 m
Qatar Qurayn Abu al Bawl 103 m Persian Gulf sea level 103 m
Réunion Piton des Neiges on Réunion 3,069 m Indian Oc sea level 3,069 m
Romania Moldoveanu 2,544 m Black Sea sea level 2,544 m
Russia Mt Elbrus 5,642 m Caspian Sea -28 m 5,670 m
Rwanda Mt Karisimbi 4,519 m Ruzizi River 950 m 3,569 m
Sahrawi Arab Dem Rep [] 805 m Sebjet Tah -55 m 860 m
Saint Barthélemy Morne du Vitet on Saint Barthélemy 286 m Caribbean Sea sea level 286 m
Saint Helena Diana's Peak on Saint Helena 818 m South Atlantic Oc sea level 818 m
Saint Kitts & Nevis Mt Liamuiga on Saint Kitts 1,156 m Caribbean Sea sea level 1,156 m
Saint Lucia Mt Gimie on Saint Lucia 950 m Caribbean Sea sea level 950 m
Saint Martin Pic Paradis on Saint Martin 424 m Caribbean Sea sea level 424 m
Saint Pierre & Miquelon Morne de la Grande Montagne on Miquelon 240 m North Atlantic Oc sea level 240 m
Saint Vincent & Grenadines La Soufrière on Saint Vincent 1,234 m Caribbean Sea sea level 1,234 m
Samoa Mauga Silisili on Savai'i 1,857 m S Pacific Oc sea level 1,857 m
San Marino Monte Titano 755 m Ausa River 55 m 700 m
São Tomé & Príncipe Pico de São Tomé on São Tomé Is 2,024 m Gulf of Guinea sea level 2,024 m
Saudi Arabia Jabal Sawda 3,133 m Persian Gulf Red Sea sea level 3,133 m
Senegal unnamed feature near Nepen Diakha 581 m North Atlantic Oc sea level 581 m
Serbia Djeravica 2,656 m Iron Gate 28 m 2,628 m
Seychelles Morne Seychellois on Mahé 905 m Indian Oc sea level 905 m
Sierra Leone Mt Bintumani 1,948 m North Atlantic Oc sea level 1,948 m
Singapore Bukit Timah on Singapore 164 m Singapore Strait sea level 164 m
Sint Maarten Sentry Hill on Sint Maarten 340 m Caribbean Sea sea level 340 m
Slovakia Gerlachovský štít 2,655 m Bodrog 94 m 2,561 m
Slovenia Triglav 2,864 m Adriatic Sea sea level 2,864 m
Solomon Is Mt Popomanaseu on Guadalcanal 2,335 m S Pacific Oc sea level 2,335 m
Somalia Shimbiris 2,450 m Indian Oc sea level 2,450 m
South Africa Mafadi 3,450 m South Atlantic Oc Indian Oc sea level 3,450 m
S Georgia & S Sandwich Is Mt Paget on South Georgia 2,934 m South Atlantic Oc sea level 2,934 m
South Sudan Kinyeti 3,187 m White Nile 400 m 2,787 m
Spain Teide on Tenerife 3,718 m North Atlantic Oc Mediterranean Sea sea level 3,718 m
Spratly Is [] on Southwest Cay 4 m South China Sea sea level 4 m
Sri Lanka Pidurutalagala on Sri Lanka 2,524 m Indian Oc sea level 2,524 m
Sudan Deriba Caldera 3,042 m Red Sea sea level 3,042 m
Suriname Juliana Top 1,230 m North Atlantic Oc sea level 1,230 m
Svalbard Newtontoppen on Spitsbergen 1,717 m Arctic Oc North Atlantic Oc sea level 1,717 m
Swaziland Emlembe 1,862 m Maputo River 21 m 1,841 m
Sweden Kebnekaise 2,104 m Kristianstad -2 m 2,106 m
Switzerland Monte Rosa 4,634 m Lake Maggiore 195 m 4,439 m
Syria Jabal el-Sheikh 2,814 m Mediterranean Sea sea level 2,814 m
Taiwan Yu Shan on Taiwan 3,952 m South China Sea sea level 3,952 m
Tajikistan Ismoil Somoni Peak 7,495 m Syr Darya 300 m 7,195 m
Tanzania Kilimanjaro 5,892 m Indian Oc sea level 5,892 m
Thailand Doi Inthanon 2,565 m Gulf of Thailand Andaman Sea sea level 2,565 m
Timor-Leste Mt Ramelau on Timor 2,963 m Timor Sea sea level 2,963 m
Togo Mont Agou 986 m Bight of Benin sea level 986 m
Tokelau [] 5 m S Pacific Oc sea level 5 m
Tonga [] on Kao 1,033 m S Pacific Oc sea level 1,033 m
Trinidad & Tobago El Cerro del Aripo on Trinidad 940 m Caribbean Sea sea level 940 m
Tristan da Cunha Queen Mary's Peak on Tristan da Cunha 2,060 m South Atlantic Oc sea level 2,060 m
Tunisia Jebel ech Chambi 1,544 m Shatt al Gharsah -17 m 1,561 m
Turkey Mt Ararat 5,137 m Mediterranean Sea Black Sea sea level 5,137 m
Turkmenistan Gora Ayrybaba 3,139 m Vpadina Akchanaya -81 m 3,220 m
Turks & Caicos Is Blue Hills on Providenciales 49 m North Atlantic Oc sea level 49 m
Tuvalu [] 5 m S Pacific Oc sea level 5 m
Uganda Margherita Peak 5,109 m Albert Nile 621 m 4,488 m
Ukraine Hora Hoverla 2,061 m Black Sea sea level 2,061 m
United Arab Emirates unnamed knoll west of Jabal Bil Ays 1,910 m Persian Gulf Gulf of Oman sea level 1,910 m
United Kingdom Ben Nevis on Great Britain 1,343 m The Fens -4 m 1,347 m
United States Mt McKinley (Denali) 6,194 m Badwater Basin -86 m 6,280 m
US Pacific Is Wildlife [] on Sand Is 13 m Pacific Oc sea level 13 m
Uruguay Cerro Catedral 514 m South Atlantic Oc sea level 514 m
Uzbekistan Khazret Sultan 4,643 m Sariqarnish Kuli -12 m 4,655 m
Vanuatu Mt Tabwemasana on Espiritu Santo 1,877 m S Pacific Oc sea level 1,877 m
Vatican City [] 75 m Saint Peter's Square 33 m 42 m
Venezuela Pico Bolívar 4,981 m Caribbean Sea sea level 4,981 m
Vietnam Fan Si Pan 3,143 m South China Sea sea level 3,143 m
British Virgin Is Mt Sage on Tortola 521 m Caribbean Sea sea level 521 m
US Virgin Is Crown Mt on Saint Thomas 474 m Caribbean Sea sea level 474 m
Wake Is [] on Wake Is 6 m North Pacific Oc sea level 6 m
Wallis & Futuna Mont Puke on Futuna 524 m S Pacific Oc sea level 524 m
Western Sahara [] 805 m Sebjet Tah -55 m 860 m
Yemen Jabal an Nabi Shu'ayb 3,666 m Arabian Sea sea level 3,666 m
Zambia [] in Mafinga Hills 2,329 m Zambezi 329 m 2,000 m
Zimbabwe Mt Nyangani 2,592 m Runde River & Save River 162 m 2,430 m
Earth Mt Everest 8,848 m Dead Sea -422 m 9,270 m
Of all countries, Lesotho has the world's highest low point at 1,400 m. Other countries with high low points include Rwanda (950 m) and Andorra (840 m). The Maldives have the world's lowest high point at 2.4 m. Other countries with very low high points include Tuvalu (5 m) & the Marshall Is (10 m).
The highest & lowest points in China constitute the greatest elevation range within any single country at 9,004 m. The elevation ranges are also great in Nepal (8,780 m), Pakistan (8,611 m), and India (8,588 m).
Monaco's elevation range is among the greatest relative to surface area. Within its 2.02 km² territory, there is a difference of 140 m between its highest & lowest points, equivalent to an average gradient of 69 m for every km². In Australia's 7,686,850 km² area there is only a 2,244 m difference between the highest & lowest points, which is equivalent to an average gradient of 29 µm gradient per km².