Bike + GPS = Digital Doodling Over the Streets of Baltimore

A Baltimore schoolteacher uses his phone and his bicycle to construct whimsical sketches on digital maps of the city, Nate Berg reports.

1 minute read

May 9, 2012, 2:00 PM PDT

By Ryan Lue


In what is half eccentric hobby, half conceptual art project, Michael Wallace has been riding his bicycle in elaborately planned, zig-zagging, wayward loops through the streets of Baltimore, using a GPS tracking feature on his phone to record his path. These routes, when displayed on a map, form doodles of animals, constellations, scenes from history, and even video game screenshots.

An eighth-grade science teacher, Wallace uses his breaks to sketch out new routes on printed maps of his neighborhood.

"To make these drawings, Wallace brings a detailed map of the city, with arrows and paths marked to keep him on track," Berg writes. "It's not always perfect, and one missed turn can ruin what can sometimes be hours worth of work. A one-block misstep had a huge impact on an early drawing of a giant rat."

"My rat ended up looking sort of like an armadillo," Wallace says.

Numbering over 200, Wallace's pieces have appeared in local art galleries, and are becoming more refined and complex. This summer, he has plans for at least 50 more drawings, including depictions of tectonic plate boundaries, Steve Irwin, and Martin Luther King, Jr.

Monday, May 7, 2012 in The Atlantic Cities

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Cover CM Credits, Earn Certificates, Push Your Career Forward

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

June 11, 2025 - Diana Ionescu

Metrorail train pulling into newly opened subterranean station in Washington, D.C. with crowd on platform taking photos.

Congressman Proposes Bill to Rename DC Metro “Trump Train”

The Make Autorail Great Again Act would withhold federal funding to the system until the Washington Metropolitan Area Transit Authority (WMATA), rebrands as the Washington Metropolitan Authority for Greater Access (WMAGA).

June 2, 2025 - The Hill

Large crowd on street in San Francisco, California during Oktoberfest festival.

The Simple Legislative Tool Transforming Vacant Downtowns

In California, Michigan and Georgia, an easy win is bringing dollars — and delight — back to city centers.

June 2, 2025 - Robbie Silver

Color-coded map of labor & delivery departments and losses in United States.

The States Losing Rural Delivery Rooms at an Alarming Pace

In some states, as few as 9% of rural hospitals still deliver babies. As a result, rising pre-term births, no adequate pre-term care and "harrowing" close calls are a growing reality.

June 15 - Maine Morning Star

Street scene in Kathmandu, Nepal with yellow minibuses and other traffic.

The Small South Asian Republic Going all in on EVs

Thanks to one simple policy change less than five years ago, 65% of new cars in this Himalayan country are now electric.

June 15 - Fast Company

Bike lane in Washington D.C. protected by low concrete barriers.

DC Backpedals on Bike Lane Protection, Swaps Barriers for Paint

Citing aesthetic concerns, the city is removing the concrete barriers and flexposts that once separated Arizona Avenue cyclists from motor vehicles.

June 15 - The Washington Post