Reading a city on the hill
A map lies about distance. In a hill city like Lisbon the straight line is rarely the real one. What it costs to learn a neighbourhood on foot.
I made a neighbourhood guide for a friend who lives on the hill of Penha de França in Lisbon. For every address, every restaurant, every café there was a walking time listed. And almost every walking time was wrong.
The problem was the hill. A map draws a straight line from A to B and allows a few minutes for it. But in Lisbon nobody walks straight. You go around, you climb, you descend, you look for the stairway that actually connects. A place that looks like twelve minutes on the map costs twenty-six in reality.
The detour as a measure
The only way to get it right was to make the detour itself the measure. A route straight downhill along the same street counts almost one to one. A route across the hills counts almost double. Only with that factor built in did the times match what your legs tell you.
Reading a city is that: not believing the map, but the terrain. Knowing that distance and effort are two different things. It is the same skill as reading a market or sensing a season. You do not read the representation, you read the thing itself.