This is a fascinating topic that bridges the gap between the meticulous hand-drawn maps of the 16th century and the massive digital databases of the 21st century.
However, there is one crucial clarification to make before diving in: While the practice of using fake streets is very real and historically significant, attributing its origin specifically to the Renaissance requires nuance. While Renaissance mapmakers inserted mythical islands and sea monsters (sometimes out of ignorance, sometimes for aesthetic reasons), the specific legal tactic of the "trap street" as a weapon against copyright infringement is more strongly associated with the rise of modern commercial road atlases in the 19th and 20th centuries.
That said, the concept of inserting unique identifiers to prove ownership dates back centuries. Here is a detailed explanation of "Trap Streets," from their historical roots to their role in Google Maps today.
What is a "Trap Street"?
A trap street is a fictitious entry—a street, a town, a river, or even a mountain elevation—deliberately inserted into a map by the cartographer.
The street does not exist in reality. If you were to drive to that location, you might find a field, a dead end, or a continuous road where an intersection is supposed to be. The purpose is not to confuse the traveler, but to entrap a plagiarist.
The Problem: The Inherent Theft of Cartography
Making a map is incredibly expensive and labor-intensive. In the past, it required surveyors, travelers, engravers, and massive investments of time. Today, it requires satellites, street-view cars, and complex algorithms.
However, stealing a map is incredibly easy. A competitor can simply trace or copy the work of the original creator and sell it for a lower price since they didn’t have to pay for the research.
The legal problem is that facts are not copyrightable. No one owns the existence of "Main Street" or "The Atlantic Ocean." If two mapmakers create a perfect map of London, those maps should look identical. Therefore, proving that Competitor B copied Competitor A is legally difficult—unless the map contains something that isn't a fact.
The Solution: The "Easter Egg" of Copyright
By inserting a fake street, the mapmaker creates a unique fingerprint. If Competitor B’s map includes "Smith Lane"—a lane that only exists in Competitor A’s imagination—it is undeniable proof of copying. This transforms the map from a collection of public facts into a unique creative work.
Historical Context: From Sea Monsters to Paper Towns
1. The Renaissance and Early Modern Era
During the Renaissance, cartography was as much art as science. Maps included "phantom islands" (like the island of Hy-Brasil or Frisland). While some of these were honest mistakes based on sailors' rumors, others were suspected to be deliberate inclusions to track who was copying whose plates.
However, the most famous early example of this tactic wasn't a street, but a "Paper Town." In the 1930s (later than the Renaissance, but crucial to the history), the General Drafting Company placed a fake town called Agloe on a map of Upstate New York. * The Trap: It was an anagram of the creators' initials (Otto G. Lindberg and Ernest Alpers). * The Catch: Rand McNally, a major competitor, released a map a few years later featuring Agloe. General Drafting sued. * The Twist: Rand McNally won the lawsuit. Why? Because people had looked at the General Drafting map, driven to that intersection, and built a general store called the "Agloe General Store." The fake town had become real, and therefore, it was now a fact that Rand McNally had a right to publish.
2. The Golden Age of Road Atlases (20th Century)
The practice exploded with the London A-Z and Geographers' A-Z Map Company. British and American mapmakers routinely included: * Trap Streets: Tiny cul-de-sacs that didn't exist. * Trap Data: Altering the elevation of a mountain by 2 feet or bending a river slightly incorrectly.
One famous example involves the "Lye Close," a fake alleyway inserted into a Bristol map, which later appeared in competitors' works.
Modern Application: Google Maps and Digital Data
You might assume that in the age of GPS and satellite imagery, trap streets would vanish. In fact, they have become more sophisticated.
Tech giants like Google, Apple, and OpenStreetMap (OSM) rely on massive datasets. Google Maps utilizes data from various providers (like Tele Atlas and Navteq, now HERE), who still use trap streets to protect their intellectual property.
How Google Maps Uses Them
- Verifying Data Integrity: Google doesn't just use trap streets to sue people; they use them to verify the quality of data sources. If Google buys data from a third party and finds a trap street that belongs to a different company, they know the data they just bought is "poisoned" or stolen.
- Moat Lane: In the UK, there was a well-known example on Google Maps of a street called "Moat Lane" in an area where no such lane existed. It was widely suspected to be a trap street inherited from the Tele Atlas database.
- Oxygen Street: Another suspected trap street found in digital maps (specifically OpenStreetMap, though usually removed quickly by community verification) was "Oxygen Street" in Edinburgh—a street that does not exist.
The "Ghost Data" Variation
Digital maps allow for subtler traps than fake roads. Google can use: * Watermarks in the Code: Hidden data points within the digital rendering that don't appear on the screen but are present in the underlying code. * Slight Geometry Shifts: Bending a road by 0.5 degrees, which is imperceptible to a driver but obvious in data analysis.
Why is this controversial?
- Safety: Critics argue that maps are safety tools. A fire truck or ambulance routed to a fake street could have disastrous consequences. (Mapmakers usually place trap streets in non-critical areas, like parks or dead ends, to mitigate this risk).
- Open Source Conflict: The rise of OpenStreetMap (the "Wikipedia of maps") relies on users tracing satellite imagery. Sometimes, users accidentally trace copyright traps from commercial maps, leading to legal skirmishes about "tainted" open-source data.
Summary
The "trap street" is one of the most ingenious examples of analog copyright protection surviving into the digital age. It reveals that maps are never purely objective reflections of the world; they are subjective creations, containing the signatures, secrets, and sometimes the lies, of their creators.