OpenGeofiction

Largest City in OGF

Posted by Alsatian on 27 January 2018 in English (English)

I just thought of something, about how many cities have been created. Then, thought, which is the largest? What is the largest city in OGF?

Location: East Freeway, Munz, Commonia

Comment from Jesus Antonio on 27 January 2018 at 23:40

Latina is the biggest

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Comment from zhenkang on 28 January 2018 at 05:37

Err, as the world is developing as we speak, we don't use superlatives in OGF, like world biggest, world smallest, etc. We use like 'one of the biggest' for describing objects.

It is still unconfirmed which is the biggest.

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Comment from Portopolis on 28 January 2018 at 07:28

^^^^ I agree with Zhenkang, currently I think I'm making the biggest city (by metropolitan area) in the world with Marie City but that is subject to change and could significantly reduced and even increased in size in the future.

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Comment from Alsatian on 28 January 2018 at 11:12

Latina seems pretty large but there could be others like it (and quite a lot of it is made up of primary roads, it isn't really realistic), and zhenkang seems pretty correct about the fact that it's developing (though the real world is developing and we know Tokyo is the largest). Marie City seems large, but probably not the largest.

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Comment from mstr on 28 January 2018 at 12:10

Use the overpass query to count buildings in a specific area, e.g. within city borders. It's a good indicator to get the answer -> at the moment.

Could we use such map-based statistics in the future to realistically determine e.g. population and economic data?

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Comment from UltraWorlds on 28 January 2018 at 15:06

Although I'd have to agree with zhenkang, as far as information goes, the largest city I could find according to the wiki is Ombo in Commonia.

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Comment from LemonKing on 28 January 2018 at 16:00

Even in RW, there is no simple way to measure how large a city is. Do we talk about largest area or biggest population? Do we compare the municipality, the urban conglomerate or the economical area including separate nearby settlements? Do we include parks, sportsfields and ponds etc in the area?

In OGF it is even harder: How high are the houses mapped, and what is their function? How much living space do people have in average? In many cases – like in the case of Ombo, Commonia – the current map way too sketchy to give even a rough picture of how many inhabitants there are: Practically no buildings, not even many streets, only main roads are mapped.

I think we shouldn't tempt people into competing who maps the largest city. It is easy to just outline a huge settlement to make it look like a big city on a high zoom level. Detailed, patient work, on the other hand, should be appreciated regardless of population density.

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Comment from louis_walker on 28 January 2018 at 16:21

@mstr That's a really interesting idea...you can say "this city has 50 million people" but until it's actually reflected in the map, it doesn't actually count. I've sort of just thought of it that way inherently, so I think of places like Latina and Marie as being the "world's largest cities" because they are actually mapped as such. I'll have to do some googling to learn how overpass queries work...

@LemonKing I get excited whenever I see people making this distinction...because I think it happens far too often, and reflects a deeper misunderstanding that most people have about how cities work. It's especially problematic here in the US, where we have HUGE sprawling metropolitan areas and ridiculously confined city centers thanks to postwar development patterns (driven largely by racism, of course, because it's the US).

Miami is a prime example: the city itself has barely 450,000 people, so if you just look at city population Mesa, Arizona, is a "bigger city" than Miami, even though it's really just a suburb of Phoenix. Meanwhile Miami's metropolitan area is home to 6 million, crushing metro Phoenix, which is home to 4.8 million. If you look at Combined Statistical Areas, greater Miami is actually the 10th largest city in the whole country. Numbers can be misleading!

Personally, I think of cities as economic units, so given that I think what people are really trying to determine when they talk about a city's size in relation to other cities is their "importance" in the larger world, I tend to think of the economic region as the best way to compare. But then, different countries have different ways of determining what constitutes a metro area so...round and round we go...

Sorry for the sermon! Clearly you struck a very nerdy chord with me! 😅

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Comment from mstr on 28 January 2018 at 18:07

@LemonKing I know that you can't measure the size of a city by counting buildings. But I want to adress the situation here in OGF, that there are "large cities" in the wiki which do not exist on the map. Like Ombo, it's a joke, absolutely not worth to discuss about it. So if you want to know which city is the largest in all categories... it's one of the cities in Mazan, haha... ;)

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Comment from Thunderbird on 28 January 2018 at 18:45

Where does Gobras City rank? I would think that or Villa Constitucion (rip) would be #1.

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Comment from Alsatian on 28 January 2018 at 20:18

^^^ Kazuya - hmm, maybe a candidate but doubtful. mstr - Good point. Thunderbird - Gobras is the largest I've seen yet, to be honest. louis_walker - That's a long one... Lemon_King - Jeez, that's deep..

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Comment from histor on 29 January 2018 at 20:10

As written before - how big a city is, is first a question of the boundaries and the administrational use in the country. Second the density (how many inhabitants each km²).

The city-limits you can map. To map the density, the software of OSM (and so OGF) is relative poor. "Residential area" can be everything. If you map the individual houses, the thing become more clear. But for a city of one million inhabitants or more this is a lot of work.

Here [http://opengeofiction.net/#map=17/-13.48409/39.66746] you can think = dense urbanisation with houses with 4, 5 or 6 levels. And here [http://opengeofiction.net/#map=18/-13.56874/39.68605] you know, that at the main-road are too this higher houses, but in the backyard streets smaller and older houses (may be only 2 levels). But if you will show this clearly, you had to set in every house the number of levels - the tagging and rendering of the map will not show this - only "building" and "residential".

To calculate realistic, how many inhabitants your city can have, first calculate the area only uses for buildings and then see, how many people can live on one km². As example for dense urbanisation = flat with 100 m² for 4 persons, 10 flats in the house (20 * 10 m), 14 houses in the block and the rest for the streets (100*100 m) and 100 blocks in the km² means 40 * 14 * 100 = 78 4000 inhabitants / km². This is like the center of Barcelona and very dense. On the other hands: small houses in the row with a little garden sets the inhabitants each km² down to roundabout 2000. So you can choose ....

Latina will have roundabout 10 million inhabitants. May be a little more or less, if the town will be ready. The town can be greater, if villages in the outskitrts will be incorporated (may be for a prolongation of a metro-line) or the town can be smaller, if I think, some suburbs may be an independent town (p.e. like Henares or Salinas were in the "past").

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Comment from Portopolis on 30 January 2018 at 02:48

Gobras City/Latina and Tarott is largest by size but when you calculate population density of the population of Gobras City can't be more than 4-5.5 million in the metro area at it's current extent, maybe if the core or remaining areas are denser the city will pass the 6 million mark.

Marie City has a few ridiculously high density areas nearing NYC but most of the city has a resting density of 11,000 per square km, and the highest it reaches in any one ward is 20,000 people per square km. This is in poorer wards like Ekika and South Daiamandoshi were density is higher not necessary because of the built form of the city although (South Daiamondoshi has 50,000 per square km in some areas that are literally only towers and Kosaten-ku has ridiculous density probably around 40,000 per square km in the center of the ward.) but because of how many poor families share a house, or apartment. It also depends on how many kids per family their is and other areas have more singles, and some wards just are popular with new couples with very little kids, all of these slight changes add up and contribute to most of the variation in the inner wards of Marie City. In fact a large park here or there could completely throw of the density also. Same with University whose density is of the scale because of how small rooms are.

http://tile.opengeofiction.net/util/map_scale.html?map=C/11.369168153221702/20.58604/86.75691&map2=OSM/x/52.54060/-361.95823&pxpt=0.277&scale=200000

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Comment from histor on 30 January 2018 at 08:04

Äh - sorry, was late in the night: 40 * 14 * 100 logically is 56 000.

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Comment from louis_walker on 2 February 2018 at 20:18

This New Yorker is throwing you some serious side-eye right now, Portopolis. Our density is not ridiculous, it is awesome. ;-P

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