Quality urban expansion

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Commuter Rail, Drawing, Greenfields, Sprawl, Street Network

There are a million examples around the world of how to do urban expansion the wrong way: auto-dependent sprawl, cul-de-sacs, single-use development, leapfrog development, commercial strip development, giant carparks seemingly eating everything else… and so on. Most often the general feeling is that these situations have occurred through a lack of planning, but ironically they have tended to occur over the past 50 years when we have done more planning than ever before – and often it is the planning rules that inadvertently support and reinforce such poor urban outcomes.

Just looking at street patterns to give us a general indicator of what a place might be like, Baba City has a few areas that could be considered ‘auto-dependent sprawl’. Here’s an example:

The cul-de-sacs suggest an auto-focused street network, based around a traditional hierarchy of arterials, collector and local roads – with little effort put in to thinking about pedestrian connectivity (although that’s always possible by connecting the ends of cul-de-sacs, this tends to create alleyways that don’t feel particularly safe). On the plus side, the main road network is fairly legible and in a rough grid – suggesting that a logical bus network could exist. While the details of density, mix of uses, the quality of public transport provided and a myriad of other factors would determine whether this area feels like yet another soulless piece of sprawl or something more interesting and sustainable, we wouldn’t exactly think of here as best practice for how to do urban expansion.

As the by-line for this blog indicates, one of the purposes of these posts is to use the analysis of a fictional place – which frees us of preconceptions of the city we live in – to assist in developing our thinking about real places. So in a way that’s a bit removed from thinking about reality, how might that look? Particularly as it feels as though we haven’t done ‘best practice urban expansion’ (whatever that might be) for quite some time. There are some hints in the work done by New Urbanists, while the need to integrate with high quality public transport (being “on the way”) also sits high in my mind. Melding these ideas together with “Transit Oriented Development” seems like a general way forward – with specifics obviously tailored to each individual situation.

Interestingly, perhaps a part of Baba City which gives us some clues about how to do urban expansion well is located almost directly east of the suburbs shown in the map above. We need to zoom out a bit to fully encompass the area:

The rail corridor (the purple line) has been the focus for development, with the four main suburbs (Hawkinsville, Carnoustie, Levendale and Kervotte) being centred on train stations. Obviously there’s only so much that’s immediately obvious from a street map, but we have most of the streets that people would live on being at right angles to the railway line, meaning that all the streets kind of “feed into” either a railway station itself or into a street that will take them to a station. For those beyond walking distance, east-west arterial roads would carry feeder bus services, once again feeding people into the rail network for trips connecting them to the rest of the city. The contrast between the street layout of the area around the rail line with the more auto-dependent area in the northwest becomes quite starkly clear.

If I was to refine this area even further perhaps, I would probably be looking at way of having an even more connected street network, making the town centres a bit more obvious (and illustrating how density, mixed use and retail would be focused there) and ensuring that all the rail stations were at points where a major east-west arterial road crossed the tracks – to make transfers between bus and rail an easy and quick process. But overall, we can see that through basing our suburbs around train stations, having a legible grid to feed people to train stations and well placed arterial roads for feeder bus trips, we can end up with what’s probably still relatively low density suburbia being something other than your typical car-dependent urban sprawl.

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The Metro System – Line 2

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Metro System

Line 2 of the Metro System serves much of the western part of the city, pretty much heading due west from “Central Station”, splitting in half towards its western end. Here’s a general look at the area of the city it serves:

In the central city, the line provides a key connection between two of the main commuter terminals: Kensington Station (A) and Central Station (B). It also connects with a large number of the other metro lines running through the city centre:

Further out to the west, the line passes through what would seem like fairly dense suburbs along the northern side of the river. You can imagine the line being put through in perhaps the early decades of the 20th century, facilitating the growth of these suburbs, then perhaps in more recent years a spread of employment along the line, perhaps a few high-rise residential buildings in close proximity to stations, taking advantage of the attractiveness of the area:

The more southern of the two branches heads off to serve a coastal residential community (probably similar to Bondi Beach in Sydney), while the more northern route hooks up with “West City”, a major employment hub for the western part of the city (the main connecting hub between the city centre and New Haven further to the west).

Compared to Line 1, Line 2 has different major patronage attractors along its route. There’s a university near its station in West City, there are major beaches that are likely to be flocked on sunny weekends, there’s a major museum not far west of the city centre and of course there are the two commuter rail terminals. That said, I don’t think it’s likely to have quite as high patronage as Line 1 – a commuter rail line would take most of the long-distance passengers from the west (although along a different catchment) while the far west sections of the line are probably not as high density as most of the areas Line 1 passes through. However, it’s still a key line in the Metro system and most probably a very busy one too.

An Evolving City

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Drawing, Motorways, Musings

My previous post about the city’s motorway system highlighted an interesting question for me to consider: whether I had “over-provided” the city with infrastructure generally. Obviously, when drawing “fantasy cities” it’s easy to be idealistic about how that place should be – what the best subway system would look like, what the best motorway system would look like, how the best urban design would occur and so forth. While that’s probably fine to an extent (after all, it seems a bit pointless to design a horrific city, they exist too common in real life), it’s also unrealistic and perhaps a bit boring. No city is a finished product, every city evolves, every city has plans for infrastructure projects that they can’t afford yet or simply aren’t necessary yet. There are always gaps in networks, pinch-points, incomplete roads and so forth – in fact it’s arguably these flaws which make a city so obviously real, so obviously evolving.

Somewhat unsurprisingly, I have drawn and redrawn some sections of the city on many many occasions. Not only are there the originals, scanned out of the exercise book I put together 15 or so years ago when I first drew this city, but also over the past few years there have been the areas that I have updated almost obsessively. The goal has often been to make these places better and better, often for completely justifiable reasons such as fixing stupidly obvious flaws that would never happen in real life. A good example is shown in the map below, where my carelessness at joining maps together across separated pages of an exercise book led to a pile of pointless dead-end roads:My next crack at this area, when I redrew it in more recent times, changed things around a fair bit while trying to still keep some of the “essence” of what I had originally drawn. This is how it was until just the other day, when after writing my motorways post I questioned whether the motorway which passes through this area is really necessary after all:

The whole impact of the motorway, and even the train line, on this area seems quite stupidly horrific, and if the motorway isn’t actually necessary then perhaps we can improve things quite a lot – so I had quite a mess with the area:

There are probably a few more final details to add, but generally the suburb of Kandallah (name influenced by my first trip to Wellington back in May 1993, which gives me a good hint of when I first drew the city) seems a much nicer place without the giant overhead motorway barrelling through it.

What’s perhaps more interesting though is the philosophical question that arises in my mind as I significantly change areas in ways that simply wouldn’t happen in real life. Did the previous version of this area just not ever exist? What about some changes where I’m obviously putting in a thing that’s a clear addition – is it reasonable to think that my process of drawing the city is somewhat akin to a reality of the place growing over time? But in some cases it certainly isn’t, because I’m changing the coastline, ripping out huge pieces of infrastructure, changing an entire street network or whatever. It always feels a bit uncomfortable to make these changes, like I’m rewriting history: no, actually that didn’t happen, this is what happened.

Maybe in an ideal world I will one day clearly “finish” the city, and then the changes I make to it from then on will somewhat approximate reality of how that city would grow and change over time. But I think in reality that’s unlikely to happen – especially now as I share the city with the world I will get more and more ideas about how it should be different: not necessarily better, but more realistic and perhaps more interesting. While that somewhat disturbs my idea of the city being a place, and is perhaps not my ideal way of figuring out how cities evolve over time, it is still an evolution of the place.

That said, I think that I do want to do a better job of making the city a bit more real. As painful as the process will be, I figure that some of the Metro Lines should perhaps be “proposed” lines, maybe some extensions should be “under construction”. Some of the motorway network should be incomplete, with plans for an upgrade but not yet affordable, or perhaps not necessary due to good alternatives existing. Some areas highlighted for redevelopment might need to be shown, in one way or another. In a sense, these issues remind us of the unfinished nature of a city, that it’s a process as well as a product, that it’s evolving. And this is great, because it’s what makes cities interesting.

The Motorway System

Tags

Drawing, Motorways

I have mixed feelings about motorways. On the one hand, over-investment in motorways at the expense of other transportation modes has destroyed the heart and character of countless neighbourhoods and cities over the past few decades. Take a look at an aerial photograph of Kansas City for example: The impact of the Cross-Bronx Expressway, widely blamed for sending the Bronx into urban decay, is also well worth keeping in mind.

At the same time though, motorways clearly have their advantages. They enable long-distance trips efficiently around a city, especially for the movement of freight or for other types of trips where public transport isn’t particularly viable. Furthermore, they also take pressure off local roads, freeing them up for shorter trips, passenger transport and also ensuring they’re nicer places to live, work, shop etc.

Our city contains what I think is a reasonable, but not excessive, number of motorways. It’s interesting to look at how they fit together into a system. The main cross-city motorway is shown in red in the map below, known as “Regional Motorway”:

Thinking about how this city fits into the entire country, regional motorway plays a key inter-city role – joining together many of the cities, although I’m not sure whether its volumes will always justify motorway standard.

Working west-to-east, the “Western Expressway” is shown in orange in the map below. It supports the city’s major development area throughout the 1950s and 1960s, linking into other motorways at both ends:

At its eastern end, the Western Expressway links in with the “Baba City – Emerald City Motorway”. Clearly, given its name, this motorway links our city with one that’s fairly nearby (say around 150km to the northwest, although inland a bit). At its southern end, this motorway delves close to the heart of the city before turning into another motorway.

While drawing the city, I had probably expected this motorway to be perhaps the busiest – at it serves a pretty major section of the city, quite a lot of industrial/commercial area (the corridor to the south of its interchange with Regional Motorway) as well as obviously linking through to a major motorway heading out east. This motorway, called “Pacific Coast Motorway” (perhaps giving us a clue about where the city would be located?) does a fairly similar job, but in the eastern part of the city:

Our next motorway heads north from a point along the “Baba City to Emerald City Motorway”, it’s called the “Northwest Motorway”:

The next major “north-south” motorway is (somewhat unsurprisingly) called the “Northern Motorway”. It follows one of the major development corridors heading north out of the city:

The last major motorway (Baba City Motorway) is perhaps the shortest of the lot (except for a small link connecting to the airport) and cuts across one of the other main development zones of the city in the post-war era: The final little bit of motorway, as I said, links to the airport – meaning that the complete network is shown in the map below:

A few thoughts stand out when looking at the complete network:

• The network is perhaps a little bit too conveniently complete. This fits with a few thoughts I’ve had about the city in general, that may it’s a little bit too ideal, too complete, too much money has gone into infrastructure to be realistic.
• There’s a pretty large chunk of the southern part of the city without any motorway access. This fits fairly well with that being one of the oldest areas.
• Maybe the purple motorway (Baba City motorway) in the map above isn’t actually necessary…?

I do think that in general I perhaps need to take a more realistic approach to the completeness of the city’s infrastructure, or perhaps need to think about ways of highlighting the city as being bigger than I had perhaps previously thought – population wise – to support such a high level of infrastructure provision.

Phases of urban development

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Density, Drawing, Metro System, Street Network, Topography, Urban History

Something I’ve always found quite interesting is to look at the phases of development a city has had. How big was the city in 1900? Where developed prior to the First World War? How about between the wars? Why did development occur in those places first rather than elsewhere? How do the street patterns, building type and general feel of an area reflect the times it was built in?

Exploring this process of urban development through analysing the city is an interesting process. I’ve already talked about the oldest part, which probably dates from the 1600s, or perhaps even earlier. So that forms phase one of our city’s development, perhaps generally where things were at in around 1750 – so still a fairly small place, although pretty intensively built up.

The first phase of development is the purple area in the picture above.

By say 1850, railways and the industrial revolution has really started to change our urban places. Typically the need for walls had stopped, plus cities were struggling to fit within those boundaries anyway. Here we also see the earliest stages of New Haven developing in the west, highlighting that its urban core also dates from a pretty early date. Our main area has grown fairly considerably and would have perhaps had a population pushing 250,000 – all pretty tightly packed in as most people needed to live within walking distance of where they worked. We also see the use of the port becoming increasingly important:

The third stage is where the city would have reached at 1900. This is a fairly arbitrary cut off date in a sense, but shows us that the second half of the 19th century continued to be a time of really rapid urban growth. This pre-1900 area forms a pretty distinctive “core” to the current metropolitan area, we see development following the rivers (for transport purposes and perhaps because industry wanted to be there too) and also following where some of the metro lines are today, telling us that these lines were probably some of the earliest, precipitating urban development around them:

The fourth phase, which is where the city would have been by the time of the Second World War, indicates a further level of quite extensive development during the first half of the 20th century. Some master-planned communities would have followed urban trends at the time, like the Garden City movement. This is perhaps most obvious in the suburb of Solaris, which I will dedicate a post to in the future. Development has also taken place along the harbour, as perhaps the rise of the automobile meant that people were no longer strongly required to live near a train station or tram line to get to work, although the extensive Metro network the city had at this point probably meant lower than average car ownership rates (sort of like New York in the USA). Population is likely to have hit a million in the early years of the 20th century, and perhaps has reached 1.5 million by World War II – indicating slower growth since that time (remembering that the current population is around 2.7 million).Obviously everywhere not shaded has developed since the Second World War. The really large chunk in the west probably was built in the 1950s and 1960s, perhaps with significant government intervention to boost housing stocks after the war. In more recent times, development has stretched up some of the valleys, but has also probably been largely through intensification as the area’s geography makes further expansion very difficult (except for in the far northeast, which is just getting a bit too isolated).

Compared to a lot of cities, this one certainly grew a lot in the 1850-1950 period, perhaps reflecting my desire to have a city that is shaped by urban trends during this time. I suppose as a matter of practicality too, with such an extensive Metro rail system, I need an urban core that’s very dense and also quite large – which realistically requires a lot of development to have occurred during the 1850-1950 period.

Airports

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Airports, Drawing

The city has two airports, which reflects the fact that it’s really two cities that have joined – one much larger and one to the west (New Haven) that has grown over time and eventually merged in with the main urban area. There are probably additional minor airports/military bases/aviation fields, but those are yet to be drawn (which is perhaps a good reminder for me to think about where they might go). The map below shows the location of the two airports (A being the main one, B being the secondary one):The main airport (Baba City International Airport) is actually fairly central, located approximately 9 kilometres north, and slightly east, of the city centre. Here’s what it looks like rather more “zoomed in”:

There are three runways, although perhaps one of them might be largely set aside as an emergency backup runway. I’m not entirely sure of how far apart runways need to be in order to operate simultaneously, but my expectation is that the centre runway would be the backup, leaving the other two to operate in normal situations – the shorter one handling shorter-haul flights and the longer one carrying the big planes. There’s just the one terminal (it seems that splitting domestic and international terminals is more trouble than it’s worth) and hopefully quite a lot of room for ancillary aviation activities (these occur further to the south too, which is a quite major industrial park).

Transport to the Airport is fairly comprehensive. The orange line at the bottom of the picture indicates a motorway (a fairly short stub motorway that links to one of the city’s main north-south motorways). The purple line travelling east-west is one of the city’s Metro lines, the green line is another metro line, while the pinkish line travelling in a north-south direction is one of the main commuter rail lines – probably with at least four tracks – and provides a high-speed service between the airport and the city centre (kind of like the Heathrow Express).

The second airport (New Haven Airport) also provides for international flights, but I expect to a much more limited number of destinations. It is possible that the airport is used by discount airlines, as it might have a bit more spare capacity than the city’s main airport and therefore offer cheaper landing fees.

There’s just the one runway, a combined international and domestic terminal, and once again access to a Metro Line (the maroon coloured line, which splits into two just north of the airport station).

Airports are important ‘gateways’ to our cities, typically providing the first impression someone has of that country. Making comparisons between say, Singapore Changi Airport and LAX Airport in Los Angeles can’t help but begin to form your impressions of those places: Singapore as incredibly organised, cutting edge, willing to invest in public facilities. Los Angeles as, well, not quite the same. While Airports have never fascinated me in the same way as, say, railway stations and metro networks, there’s certainly value in them and I did work pretty hard to ensure that the city’s main airport in particular came across as a world-class airport befitting a city of its size.

The Metro System – Line 1

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Metro System

Of course, being something of a transport nerd, the creation of a public transport system for the city is something that has occupied much of my attention. You can see the system as a whole in the image below, or a much more “zoomed in” version by clicking here:Over the next few months I hope to work my way through understanding and describing large chunks of the city’s transport network in quite a bit of detail. Transport, obviously, is critical to the way a city functions. Especially in quite a dense city, and a city with relatively few motorways, the quality of the public transport system is going to be critical.

Line 1 is the black line in the image above, running in an approximate northwest to southeast direction, passing through the city centre towards its southern end (although continuing out past the city centre for a bit too). The line’s location is shown in the map below (bigger image here): You can see at its northern end the line splits in two, to cover a broader area but also most likely an area with less demand that means running at half the frequency on each branch (assuming that they get an equal number of trains, which I think is what would happen) is sufficient.

At a guess, this line is probably of of the city’s busiest Metro lines. In its northern half (say above where it intersects with the blue line) it runs through what seems like a pretty dense residential area. Although the river immediately to the west of the line somewhat affects its catchment, I have always anticipated that there are a great number of east-west bus routes feeding people into both the red and black lines – and for city-bound trips the black line is probably the quicker of the two. Close into the city, the line then runs through a number of high patronage generators. The map below highlights their location, and a description of each is provided below:A: Major sports complex including a cricket ground and a football stadium. Neither are the city’s largest stadiums, but still something that’s likely to draw some fairly large crowds (mainly for domestic games rather than internationals) on a fairly regular basis.
B: The city’s largest university, so a huge generator of patronage.
C: The city’s civic centre, including a monument, City Hall, a large public square and various other tourist attractions. Also a hub of business activity, particularly relating to the city’s governance.
D: Transfer to one of the three main commuter rail hubs, providing commuter rail access to the very northern suburbs and also the main inter-city station. Line 1 is the only line providing a direct link between this station and our next main generator…
E: Transfer to another of the three main commuter rail hubs, which provides access to the northern and eastern suburbs.
F: A major theme park at the end of the line. A major tourist attraction of international standard, and therefore a large trip generator on weekends in particular but also generally at all times.

My feeling is that trains along this line would need to be running at pretty high frequencies most of the time to cope with demand. I had envisaged this line running 24/7, although it seems that this often causes more problems (through making maintenance really difficult) than it solves – so I’m up in the air on that matter.

The line is almost entirely underground, except for where it runs through a large train storage yard (around its transfer point with the blue line). This reflects that it runs through very dense areas for pretty much its entire length, and also probably that each end of the line (which were probably built later than the central part of it) were extended into parts of the city already constructed at fairly high densities.

All up, the line is crucial to the functioning of the city. It serves significant tracts that are built up at quite high densities, doesn’t really duplicate any other line to a great extent, and connects many major trip attractors.

Grids

Tags

Auckland, Buses, New York, Street Network, Vancouver

I wouldn’t say that the city is dominated by grids, although areas with a gridded street network do pop up here and there. Perhaps because they can be amusing (although a bit tedious) to draw, perhaps because they create nice urban environments, perhaps because I want to create numbered streets and see how high I go can, or perhaps because they’re really excellent streets for running public transport through.

Here’s an example area: North American cities are perhaps most famous for their street grids, at least in the kind of “near perfect” form that you can see in the image above. The grid on Manhattan Island, north of 14th street in particular, is particularly famous. The map below shows a section of the Upper East side: avenues running north-south, streets running east-west, streets generally alternating in direction although some being extra wide and operating two-way. Vancouver is another city with a very extensive grid: The street pattern in Vancouver (as well as New York, although subways are more prevalent in New York) makes running a legible bus network far far easier than would otherwise be possible: For a while I couldn’t make my mind up about whether grids were a good thing or a bad thing for urban areas. On the one hand there are all the rational positives: the legibility, the connectivity, the different options, the dispersal of movement, the potential for logical public transport routes, the clean-ness. But on the other hand, at times it does just seem a bit dead boring. The same street pattern over and over and over and over again creates a risk of ending up promoting urban spaces which aren’t memorable and could be replicated in a million other locations.

But, having visited New York and Vancouver, and many other places with street grids (particularly San Francisco comes to mind), I probably tend towards my positive thoughts about grids. In a way, a street network acts like the bones of a city, structuring it, holding it together and having an enormous impact on how that city will work. But it’s what you do with the network that will end up determining whether a place is interesting or whether it’s dead boring. The Canadian town of Prince George has a grid and is dead boring, but I don’t think it’s the street grid’s fault for that – it’s just a boring place. While there’s something inherently interesting about the intricate street networks of downtown London or Paris, I don’t think New York suffers in comparison because of its gridded network (although what it does with those streets may have a lot to do with comparisons).

Of course, it’s not a total black and white choice between a perfect grid and a higgledy-piggledy mess. Somewhere like Balmoral, here in Auckland, has what you might think of as a “deformed grid”, a mixture with some aspects of a grid but other streets that don’t hook up, and certainly a bit more variety in the network than you might see in the above cities – but without losing the accessibility, the connectivity and the legibility: Perhaps a deformed grid can provide the best of both worlds? Or perhaps we need to think about how we can make supposedly bland regular grids more interesting through slowing down some streets or really focusing on the built environment created around the bones of the street network.

Overall though, I must say I quite like grids. And I quite like the fact they seem to come in many different shapes and sizes.

Funky Urban Places

Tags

Boston, City Centre, Street Network, Sydney

I was chatting with Leila last night about ideas for posts for this blog, and many of of the ideas she came up with related to things that she would want to know about the city. Interestingly, it’s similar for me – and perhaps one of the main reasons why I want to write this blog is to learn a lot more about the details of a city that I created, often without thinking too deeply over what I was doing. I’m sure there will be many occasions where I go “hmm… that really doesn’t work and needs to be changed”, but perhaps that’s a really useful thing to happen.

One thing Leila was keen on finding out was where the “funky” parts of the city would be. Not necessarily the downtown areas, but the parts of the city having interesting transitions from being “down and out” in the post-industrial 1970s to revitalised. Full of cafes, bars, interesting independent shops, but with a density of people at all hours of the day to make it feel like a safe and welcoming place to be. Often these parts of the city have a “funk” that is more nostalgic than real, due to an advanced state of gentrification, although it is often the well-off creatives that push the less well-off creatives out of the area.

A part of my city just to the east of the central area seems to fit the description reasonably well: The intricate street network, overlaid with broader arterials (yellow lines) and strongly served by a variety of underground metro lines (the bright overlaid lines), indicate that we’re looking at a pretty intense urban area here. Perhaps something that was originally developed in the mid-19th century, as the streets aren’t as narrow and as all over the place as we saw in the historic centre.

Proximity to one of the city’s main rail terminals (bottom left corner) and a major tertiary institute (just to the east of the station) have probably driven the development of the area over time. The major east-west motorway crossing the southern part of the area is likely to have been put through in the 1950s or 1960s, potentially causing major severance for the neighbourhood and perhaps precipitating a decline in its attractiveness during the 1970s and 1980s as people shifted out to more distant suburban areas. I haven’t really thought too much about the staging of constructing the city’s subway/metro network, but perhaps the Blue Line could have been one of the later lines and become a catalyst for the area’s revitalisation. The map below shows (in the red box) where this area falls in relation to the urban area as a whole, and the very centre of the city (illustrated by the red dot): There are some interesting neighbourhoods to look at internationally to get a feel for what the area might be like. Boston in particular has a series of inner suburban areas which have undergone significant revitalisation in recent decades. The North End area is the oldest bit of Boston, was cut off from the rest of the city by an elevated freeway for many years, is a really high density neighbourhood, a lot of ethnic diversity in its history and certainly, when I visited it back in 2010, felt like a pretty happening and funky place. Here’s an aerial of the area: While parts of North End are quite touristy, due to it being the oldest part of Boston, much of the area looks like this: Perhaps the older parts of this section of the city could be like North End. The inner west part of Sydney also has the kind of characteristics that may be present in the area – although you can see the street pattern is a bit more regular and planned, perhaps suggesting a later construction date: The housing typology here is quite a mix too, from standalone dwellings to terraced houses to apartment buildings. It also seems like there’s quite a bit of of “house above the shop”, which is a useful form of mixed use development. Here are a couple of Google Streetview images of this part of Sydney’s inner west: And for more residential areas: Obviously, looking at both the North End of Boston and Sydney’s inner west, one striking characteristic is the predominance of older buildings. These places aren’t “fake funky”, created in recent times and master-planned to be just the way it is. Instead, the places have an obvious and complex history. They have had their ups and downs. They’re now popular, but perhaps there are still a few student flats amongst the yuppies, with couches out on the porch.

The interaction between the parts of the area that would look like each of the three above photos would also be fascinating and funky. With the kind of residential density created by the “North End-like” areas, there would be plenty of support for shops and other amenities. The fuzzy boundaries between the different areas would be indicative of the area’s general location as a halfway point between the very high density downtown area and the lower density surrounding inner suburbs. Perhaps the lower density areas have been retained for their heritage characteristics, whereas the market may have otherwise replaced them with apartments – but maybe elsewhere the protection mechanisms weren’t there at the time, leading to an interesting mix of the old and new, in parts.

Overall, I like these parts of the city and one of the saddest things about some cities is  the strong division between the downtown and its surrounding areas. The interaction and blending of the city centre and the inner suburbs creates funky urban places, places that change significantly over time, yet have great bones in terms of their built form and their street network, to survive these changes and eventually prosper.

This is certainly a part of the city that I’d like to live in.

Estimating Population

Tags

Density, Drawing, Population

Perhaps the most defining characteristic of a city is its population. From the largest city in the world (Tokyo, population over 30 million) to the tiniest little hamlet, the population of a place obviously has a huge effect on its nature. Something I have thought about for a while is whether there might be an ideal population for a city – at what point do they become “too large” (if such a point exists)? At what point is a city stuck between being an overgrown town and something that actually resembles a bustling metropolis. Auckland seems to be borderline between the two at the moment, with the struggle for choosing which way it falls being a key issue we will have to deal with over the next few decades.

Of course, when creating an entirely fictional city, the question of what its population might be. Over the years I have struggled a bit with the scale of the maps I was drawing, some things seemed a bit too big for a certain scale, others a bit small. Eventually I settled on 1:12,500, or 1cm equally 125 metres at 100% zoom. This gives us the following approximate dimensions for the map of the city: This gives the map a total area of around 2205 square kilometres, around the urbanised area of Bangkok in Thailand and just a bit bigger than Melbourne in Australia. If the whole map was filled in, it would be around the 30th largest urbanised area in the world, by area. Of course the whole map isn’t filled in with city, with the picture below showing that fairly clearly: Now here’s where a bit of guess-work comes in to estimate the proportion of the whole map that’s actually urbanised. As a bit of a wild ‘stab in the dark’, I’m thinking around 40%. Which leaves us with an actual urbanised area of 882 square kilometres. This is similar to Madrid in Spain, or Edmonton in Canada – and still quite significantly larger than Auckland’s 544 square kilometres.

The next step in working out our population is to have a think about what the city’s average density might be, right across the urbanised area. Average density can give us some strange results, like New York being similar (and slightly below, in actual fact) the density of Los Angeles. But it’s a useful figure for this exercise. For some comparative cities to give me an area of numbers, we have Tokyo at just over 4000 people per square kilometre, Paris at 3,300, Auckland at 2,200, Vancouver at 1,700 and greater New York at 1,800. As you’ll come to learn over the next while, the city doesn’t have much of a motorway network and has a hugely developed subway and commuter rail network – so densities are likely to be pretty high to support that kind of transport system. So let’s say 3,000 per square kilometre, with a really dense central area and some lower density areas further out. Definitely the kind of overall density that would support a strong public transport system.

Add the numbers up and we get a total population of around 2.7 million. As I develop this blog and explore the city further, I will keep this figure in mind to assess whether it feels right (to be honest it feels a little on the low side). My estimate of density may change over time to reflect the kind of city I really think it is – because, as I said at the start of the post, population is that critical element.