Ever seen a city that looks like someone dropped a European capital into the middle of a developing-country suburb and called it urban planning? That's the griffin ford model ap human geography students keep bumping into — and most of them memorize the shape without ever understanding why it exists.
Here's the thing — the model isn't just a weird diagram for a test. It's a lens for seeing how colonialism still shapes where people live, decades after the flags came down Surprisingly effective..
What Is the Griffin-Ford Model
The Griffin-Ford model is a way of describing how many cities in Latin America actually grew, not how Western textbooks said they should. On the flip side, it was developed by Ernst Griffin and Larry Ford in the 1980s. They looked at real cities — Bogotá, Lima, Santiago — and realized the old models from the Global North didn't fit.
And look, the basic idea is this: you've got a colonial core, a surrounding zone of maturity, and then a massive ring of squatter settlements on the outside. That's the short version. But the model isn't a clean bullseye. It's messy on purpose.
The Colonial Core
In the center sits the plaza mayor, the cathedral, the government palace. Still, wide streets, central square, buildings meant to project power. That said, this is the Spanish (or Portuguese) grid from the 1500s. It's still the prestige address — or at least the financial one.
The Zone of Maturity
Move outward and you hit the zone of maturity. Think about it: these are older residential neighborhoods, often from the late 1800s to mid-1900s. Solid housing, utilities, paved roads. Middle-class families. In practice, this is where the city "worked" before the population exploded Surprisingly effective..
The Zone of In Situ Accretion
Then things get interesting. Plus, the zone of in situ accretion is where original poor housing slowly got upgraded — a tin roof becomes concrete, a dirt path becomes a street. People didn't move; their homes evolved around them Easy to understand, harder to ignore. Practical, not theoretical..
The Peripheral Squatter Settlements
And finally, the outer ring. Practically speaking, massive barrios or favelas, built by people who arrived with nothing and claimed land on the edge. Consider this: no services at first. Over time, some get connected. Others don't.
Why It Matters
Why does this matter? Because most people skip the part where the model explains inequality without using the word.
Turns out, where you live in a Latin American city often predicts your lifetime income, your commute, your kids' school. The Griffin-Ford model shows that's not accidental. The core was built for elites. The periphery was built by everyone else, out of necessity.
Honestly, this part trips people up more than it should.
Real talk — if you're studying AP Human Geography, this model is one of the few that actually connects the colonial past to the present city. That's Chicago. That's industrial cities. The concentric zone model? The sector model? Griffin-Ford is the one that says "hey, history screwed this place up and you can see it from space.
And for anyone outside a classroom: understanding this helps explain why simply "building more housing" in a city like Caracas or Guatemala City doesn't fix the problem. The geography is layered with power.
How the Griffin-Ford Model Works
The meaty part is how the pieces fit and why the model looks the way it does. Let's break it down.
Start With the Spanish Trading Post City
The seed is the colonial grid. Spaniards didn't land and think "let's plan for 10 million people." They built a square for the church and the crown. So the center is dense, formal, and old. Everything else grew around that seed like rings on a tree That alone is useful..
Watch the Elite Move Out (Sort Of)
In many U.So naturally, s. So cities, the rich fled to the suburbs. pattern. So you get a wealthy center surrounded by a poor periphery, which is basically backwards from the U.In Griffin-Ford cities, the elite often stayed near the core — but built new enclaves adjacent to it. Because of that, s. Worth knowing if you're comparing models on an exam.
Understand the Periphery as a Process, Not a Place
Here's what most people miss: the outer ring isn't static. It's not "core good, edge bad.A squatter settlement from 1970 might be a concrete neighborhood with bus lines by 2000. The model accounts for that through accretion. " It's "edge becomes less edge over time, if the city allows it It's one of those things that adds up..
Map the Commercial Spine
Another detail — there's often a commercial spine or "middle-class wedge" cutting through the zones. A main avenue where businesses cluster. This breaks the neat rings and shows real cities aren't perfect circles. Griffin and Ford were honest about that No workaround needed..
See the Disconnected Services
In the periphery, utilities are patchy. Water trucks. In real terms, illegal connections. No sewage. The model implies a service gradient — the farther out, the less the state provides. That's not a footnote. That's the daily reality the model is describing.
Common Mistakes
Honestly, this is the part most guides get wrong. They treat Griffin-Ford like a coloring exercise That's the part that actually makes a difference..
One mistake: confusing it with the concentric zone model. Burgess's model has rich at center, poor at edge, and churn as you move out. Different. Griffin-Ford has poor at edge too — but the center was never poor, and the edge wasn't always there Which is the point..
Another mistake: thinking it only applies to colonial cities. It mostly does, but similar layered peripheries show up in parts of Africa and Asia with different colonial histories. The mechanism — core imposed by power, edge filled by migrants — travels Not complicated — just consistent. Still holds up..
And a big one for students: memorizing "four zones" without understanding the in situ part. If you can't explain why a neighborhood looks half-old-half-new, you don't actually get the model. You've just labeled a picture Worth knowing..
I know it sounds simple — but it's easy to miss that the model is dynamic. Zones shift. The periphery today is not the periphery of 1980.
Practical Tips
If you're trying to actually learn this (not just cram it), here's what works Most people skip this — try not to. Practical, not theoretical..
Draw it from memory, then check. Sketch the core, the zone of maturity, the accretion ring, the squatter settlements. Because of that, seriously. If you can't place them without the book, you don't know it Which is the point..
Compare it to one real city. Pick Lima. Find a satellite image. The wealthy districts near Miraflores and the old center — then the vast conos on the outskirts. The model stops being abstract Worth keeping that in mind..
Use the word accretion correctly. Also, it means gradual growth in place. On top of that, not migration. Because of that, not invasion. In situ. That single distinction clears up half the confusion That alone is useful..
And for teachers: don't just show the diagram. Show a photo of a favela next to a plaza mayor. The visual gap is the lesson That's the part that actually makes a difference. Simple as that..
Skip the flashcards that say "Griffin-Ford = Latin America." True, but useless. Flashcard should say "Why does Griffin-Ford show squatter rings instead of suburban rich?" Now you're thinking Surprisingly effective..
FAQ
Is the Griffin-Ford model only for Latin America? Mostly, yes — it was built from Latin American cases. But the logic of a colonial core plus migrant periphery shows up in other postcolonial cities too Most people skip this — try not to..
How is it different from the concentric zone model? The concentric zone model is based on Chicago and assumes invasion-succession from center out. Griffin-Ford is based on colonial cities where the center was always elite and the edge was added later by poor migrants.
What does "in situ accretion" mean? It means housing that started poor and improved over time in the same location, rather than people moving to a better house. The neighborhood upgrades around the original settlers That's the whole idea..
Why do AP Human Geography students need this model? Because it's one of the few models that explains urban form through colonial history and ongoing inequality, not just economic function Which is the point..
Do these cities still look like the model today? Many do, though some peripheries have formalized. The gradient of services and wealth is often still visible.
The Griffin-Ford model isn't just a diagram to survive a test — it's a way of looking at a city and asking who got to plan it, and who had to build it themselves. Once you see that, you can't unsee it, whether you're in a classroom or staring at a skyline from the wrong side of town Small thing, real impact..
Honestly, this part trips people up more than it should That's the part that actually makes a difference..
