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Fill the World Map with City Dots Of Radius 15

Name the city that is at the exact center of each circle you see on the map!

If you want to know how they were chosen: put a circle of radius 15 at the location of the world's largest city. Now put one for the next largest city that doesn't touch the circle you already placed. Keep going, making sure no previously placed circle is touched!
Data for 1M cities from citypopulation.de, data for smaller cities from geonames.org
Answers are sorted alphabetically
Cities with no more than 10,000 inhabitants are only considered if they have no larger city within 100 km
Quiz by scambigol
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Last updated: March 26, 2017
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First submittedMarch 25, 2017
Times taken78
Average score40.8%
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City
Agadir
Al Mukalla
Al Qatrun
Alice Springs
Ambon
Anadyr
Anchorage
Antananarivo
Arkhangel'sk
Astrakhan'
Atuona
Auckland
Auki
Aykhal
Bangkok
Barrow
Beijing
Belém
Bergen
City
Berlin
Boa Vista
Bogotá
Buenos Aires
Cairo
Cape Town
Chengdu
Cherskiy
Chibougamau
Chicago
Colombo
Comodoro Rivadavia
Dakar
Dallas
Dar es Salaam
Delhi
Dhaka
Dunedin
Dutch Harbor
City
Edinburgh of the Seven Seas
El Oued
Faaa
Fort Collins
Fort McMurray
Funafuti
Gao
Georgetown
Grytviken
Guangzhou
Gurupi
Hanga Roa
Harbin
Helsinki
Hobart
Honolulu
Inuvik
Iqaluit
Iranshahr
City
Istanbul
Jakarta
Jamestown
Johannesburg
Juba
Juneau
Khartoum
Kinshasa
Kolonia
Koror State
Kota Kinabalu
Kuala Lumpur
Kugluktuk
Lagos
Lima
London
Los Angeles
Los Mochis
City
Lubango
Lusaka
Madrid
Managua
Manila
McMurdo Station
Mexico City
Miami
Mogadishu
Mogocha
Monrovia
Moscow
Mumbai
Naples
N'Djamena
Nefteyugansk
New York
Noril'sk
City
Noumea
Novosibirsk
Nuuk
Olonkinbyen
Palmerston
Perth
Petropavlovsk-Kamchatsky
Ponta Delgada
Port Hedland
Port Mathurin
Port Moresby
Port-aux-Francais
Porto Velho
Puerto Ayora
Rankin Inlet
Recife
Reykjavik
Rikitea
City
Riyadh
Saint George's
Saipan
Santa Cruz
Santo Domingo
São Paulo
Seattle
Shanghai
Shepetivka
Suva
Sydney
Sydney
Ta`u
Tabwakea Village
Tarawa
Tashkent
Tasiilaq
Tehran
City
Tiksi
Tokyo
Townsville
Tromso
Ulaanbaatar
Upernavik
Ürümqi
Usinsk
Ust'-Ilimsk
Ust-Nera
Valparaíso
Victoria
West Island
Whyalla
Winnipeg
Yakutsk
Yekaterinburg
Yuzhno-Sakhalinsk
TenThousand
+1
Level 76
Mar 25, 2017
Another amazing quiz!!! Questions for you: Should Murmansk (pop 307,000) be here? If you mean Georgetown in Guyana, that dot does not cover Georgetown. Should Brasilia be here? Finally, you mentioned that you prefer to use Faa'a in Tahiti rather than Papeete, but can I suggest Papeete be allowed as a type-in?
scambigol
+1
Level 76
Mar 25, 2017
thanks again for your comments! Murmansk and Brasilia can't appear because they are in 'open' space but their circles would touch other ones (eg Murmansk would touch Archangel). I have added Papeete as a type-in in general (ie in the excel file I use to create quizzes) but had forgotten to add it to this quiz. The Georgetown in this quiz is the capital of Ascension island in the middle of the Atlantic Thanks again!
TenThousand
+1
Level 76
Mar 25, 2017
Also, what is the dot on the coast in central-north Australia? I tried Darwin but it didn't work, and Darwin is the biggest city for a large area in the centre-north of Australia.
scambigol
+1
Level 76
Mar 25, 2017
that's Palmerston. I can read the answers by moving the mouse over the dot when the quiz is over, but as in previous cases I guess this doesn't work for you? Palmerston's circle almost touches Ambon's so I guess Darwin would overlap it hence it gets excluded. By the way I am now trying to prepare quizzes where you have to type the largest city within the circle which is more intuitive, so thanks for all your comments!
TenThousand
+1
Level 76
Mar 25, 2017
Palmerston is a suburb of Darwin! Another Papeete/Faa'a situation.
scambigol
+1
Level 76
Mar 25, 2017
ah, ok, didn't know that! well this time it's slightly different: I guess Palmerston's circle doesn't touch any other circle but Darwin does... I guess there may be more cases like this since I mixed urban data from citypopulation with data from geonames.org which doesn't 'agglomerate'. thanks for your comment!
TenThousand
+1
Level 76
Mar 25, 2017
Here's Palmerston for your information!
kiwirage
+1
Level 63
Mar 25, 2017
Brilliant! It's a pity you have to zoom in on each circle to see clearly how much area it covers; for example, the lower circle in New Zealand looks like it covers the whole of the South Island. I typed in various spellings of Christchurch, the biggest city, before trying Dunedin (my home city!), not understanding why that was the correct answer. Then I realized after a few minutes that zooming in on each circle revealed a much smaller area. Any way to fix this?

I also found the instructions confusing. You make it sound like the quiz has to be completed in a specific order, from the largest city on the map all the way down to the smallest. Wouldn't it be simpler to just say "Name the largest city within each circle shown on the map"? Or am I not understanding something? Sorry to sound so critical - this is an amazing concept!

scambigol
+1
Level 76
Mar 26, 2017
thanks for your comment! sorry for confusing instructions, that's often the case with me!

I'll try explaining in a different way: the circles were added in a specific order: circle around Guangzhou as it's the biggest city, then 2nd biggest etc as long as the circle you add doesn't overlap any circle that's been added already. So you are not looking for the largest city inside a circle but for the one that is at the very center of the circle. This can lead to odd situations like the ones Jerry pointed out: Darwin can't be added because it would touch a circle but Palmerston, only a few km away, can! I could have made the circle with twice the radius as that would highlight the area where you can't have new cities, but then there would have been lots of overlapping. I thought that leaving the circle as 'zoomable' would be helpful in pinpointing where the city you are looking for is. Anyway, after reading Jerry's comments I prepared a quiz where you guess largest cities in circle!

kiwirage
+1
Level 63
Mar 26, 2017
Ok, I think I understand what you mean about the overlapping. :) But couldn't the instructions then just read "Name the city that is at the exact center of each circle you see on the map"? I think all your instructions about 'radius 15' and 'not touching the circles' or 'overlapping' is unnecessary and makes the quiz seem much more complicated than it actually is. Also, without the 'yellow box' requirement, the answers can be completed in any order, so why Guangzhou first?
scambigol
+1
Level 76
Mar 26, 2017
ok thanks - I guess I wanted to explain how the cities were chosen but then ended up creating more confusion. Eg 'Guangzhou first' refers to how the cities are chosen. thanks again!
kiwirage
+1
Level 63
Mar 26, 2017
Ah, now I understand! You were describing the process by which you created the quiz. It seemed like they were the instructions for the quiz taker. All is clear now :)
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