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Google Maps, the dynamic GIS system

Earlier this year, Google Maps added a feature to the common maps interface that allows users to identify problems* with map data or presentation. Click on the “Report A Problem” link in the lower right corner of the current map view. Then drag the marker on top of the error, categorize it, then write a description of the problem.

I reported several problems soon after the feature was released. I checked up on the results of one problem I reported. The situation was the lakefront multi-use path along Lake Michigan in Chicago, Illinois. The screenshots below show the map before I reported the problem and the repaired map.

With this addition, Google Maps seems to be encroaching on the territory of Open Street Map (OSM) that uses ONLY public domain (not the same as free) and user-contributed data. But the data users contribute to Google Maps (in the form of reporting problems on the map) become the property of Google and its data providers.

From the OSM Wiki, “The copyright of the whole data set is scattered among all contributors. Some contributors release their contributions to the public domain.” Readers interested in learning more about maps in the public domain should read this Guardian article about the UK’s Ordnance Survey heavy grip on its data.

Disclaimer: I felt prompted to write this post because James Fee on his blog often (1st) writes (2nd) about the (low) quality of the data Google puts in its Maps.

*Users have long been able to report problems, but never in such an easy way or one that tracks reports and notifies the user when Google fixes the error.

Downtown Chicago from 28 floors up and half a mile away

I went to the top floor of UIC’s University Hall and took a few hundred shots with my Olympus E-500 digital SLR. That was 3 years. I came across them while switching photo libraries, iPhoto to Aperture. From this high up vantage point that’s removed from the skyscraper core, you can see different spaces, shapes, and interactions.

Photo: Reclaim the streets


You should be able to tell that Peoria Street had auto traffic across the entire bridge over the Eisenhower (I-290), but then the University of Illinois at Chicago (UIC) took over this area in the 1960s (shortly after the sunken Blue Line was built). An expanded station house was built with a large waiting area which includes interior bike parking within the paid fare zone.

UIC has classrooms immediately north and south of the expressway and Blue Line so it’s in their students’ best interest to have good access to the train station.

How could the former road space be changed now to make this a better public space or plaza?

I think the first thing I would do is remove the curbs – if you’re riding a bike these get in the way.

Tuesday roundup: Getting around

These are the posts about “getting around” I found interesting today. Blogs and the links to the referenced articles are in bold.

“Nowhere does transportation happen for transportation’s sake.” – Professor DiJohn, UIC.

Discovering Urbanism

Have you ever noticed from an elevated train or an airplane the dirt paths and small trails through parks and vacant lots? Like water and electricity, people travel the path of least resistance, with or without a dedicated facility. (Is that why flooding’s so difficult to control?) In the most recent “Google Earth Travelogue,” Discovering Urbanism points out the innumerable walking paths in the quarter mile park or mall between two highways and building corridors in Brasilia, the master planned capital of Brasil. Selected quotes:

I added this comment about how planners can use this “route choice theory” (path of least resistance) to determine where to install paths for bicyclists: “Where should cities build bikeways? Where people want them. And how might we figure where people go, aside from a stated answer survey, we could tag 1,000 random bicyclists with GPS and track where they go. It would probably give us an image like the second one in your post: with yellow lines criss-crossing the city’s street network.”

Jennifer Dill’s study of Portland, Oregon, bicyclists did just that! She asked, “How does the built environment influence bicycling behavior; and what routes did they take?” The project wasn’t used to determine where routes should be built, but how existing routes affect trips. I think the same data the project collected could also be used to answer my question, “Where should cities build bikeways?”

Human Transit

The City of Minneapolis, Minnesota, is in the midst of a major transportation upgrade in downtown. They’re converting one-way streets to two way streets with bike lanes and off-peak parking. What a way to “unlock downtown,” says Human Transit.

And they tripled bus capacity on new transit malls with two regular travel lanes in one direction, and two bus-only lanes in the opposite direction. The malls also mixing in staggered bus stops, or groups of stops targeted at a specific area of the city, making “service more legible.” Selected quotes:

  • “…every bus was as slow as the slowest bus.”
  • “Doubling the width triples the capacity.”

I visited Minneapolis in September to explore the Midtown Greenway and Hiawatha light rail. I also rode my rental bike through downtown to get a feel for how another Midwestern city’s downtown lives.

The Transport Politic

Dubai seems to grab way more headlines than its Persian Gulf neighbor, Qatar. But Qatar, with the fastest growing economy on Earth, has decided rail (both passenger and freight) infrastructure is a “crucial element to economic viability.” Some might say the Dubai Metro heavy rail transit line is too late to battle congestion (Reuters). Can Qatar avoid the same fate?

The plan the Qatari government signed with Germany’s Deutsche Bahn is ambitious: “The project will incorporate 180 miles of local light and metro rail for Doha city center, rapidly expanding public transportation offerings for what is now a car-centric place.” Selected quotes:

  • “Deutsche Bahn is laying its reputation — and its money — on the line for this project, which will be its largest-ever foreign investment.”
  • “If a country is defined by the spending it commits to its future, the U.S. is falling behind rapidly.”

I don’t think the United States will start comparing itself it to any Middle Eastern country anytime soon – many in this country still think Iraq was involved in the September 11, 2001, terrorist attacks.

The magic of the RFID card: Applications in transit

The Chicago Transit Authority should convert the U-Pass program from using magnetic stripe fare media to an RFID, or proximity, card.

Several times on weekdays on the University of Illinois at Chicago campus, a crowd of up to thirty students waits for the 8/Halsted bus after a class period ends. A very high percentage of the students will use a U-Pass to pay for the bus fare. All U-Pass users have to dip their cards. According to the Transportation Research Board’s Transit Capacity and Service Manual, each passenger with a dip card will take 4.2 seconds to pay their fare whilst users paying with contactless cards will take 3.0 seconds each to pay their fares.

Converting the U-Pass student fare program to use the same contactless fare collection as the Chicago Card and Chicago Card Plus will improve the Chicago Transit Authority’s quality of service on all bus routes, especially those routes used heavily by program participants.

Contactless fare collection technology (also known as Radio Frequency Identification, RFID, or proximity cards) gives customers additional options to pay and manage their transit fares. It keeps prepaid fares secure against theft and loss. The customer can easily switch payment methods – between a credit/debit card online and debit card/cash at vending locations – and fare types – pay-per-use or 30-day unlimited use. What is most important is how contactless fare collection speeds boarding onto buses and passing through turnstiles at rail stations. This aspect of the technology most discernibly improves the CTA’s quality of service. Taking into consideration all these benefits, contactless cards provide the greatest passenger convenience for fare payment.

Quality of service is the customer’s perception or assessment of performance. The first percept would be the increased boarding speed at key bus stops. The improvements, visible to the boarding passengers and which positively affect the route, cascade from there: increased boarding speed reduces dwell time, which can help keep buses operating on their posted schedule and shrink the rate of bus bunching. The performance gains are measurable – there would be a half-minute decrease in dwell time at UIC bus stops, amongst other gains.

Contactless fare cards are more durable than the U-Pass, which is surprisingly less durable than the CTA’s paper Transit Cards. Anecdotal evidence suggests that the U-Pass card material is more prone to cracking and tearing than the Transit Card material. Currently, UIC students who require a replacement card must pay a $35 fee – an exorbitant amount that does little to deter the anger or frustration of those students who use their cards daily.

A secondary benefit in convenience for the student, the participating colleges, and the CTA, is that producing the U-Pass as a contactless farecard could be permanent: students would keep the same fare media through their entire tenure at the school. Each and every semester, the schools and CTA would spend less labor hours for temporary U-Pass farecard printing and distribution. Alternatively, the U-Pass program could be applied to the existing Chicago Card and Chicago Card Plus system, similar to how London Oyster cardholders can add 7-day, monthly and annual passes, giving transit passengers more options than 30-day unlimited use or pay-per-use. During the semester and the U-Pass activity period, no fare would be deducted from the student’s contactless farecard. When the semester is over or the U-Pass activity period is complete, the contactless farecard would automatically switch to the user-defined fare choice and payment plan.

Converting existing fare programs to work like the CTA’s Chicago Card and Chicago Card Plus would be a prudent and appropriate step for the CTA to take to improve the quality of service for U-Pass eligible students and the bus system alike.