1. Mapping Bus line 85 Michael Alexander Hoklan Hau

2. Motivation Public transportation provides many societal benefits Madison’s public transportation system is confusing to use – Lead to underutilization

3. Hypothesis By making navigation of the city of Madison’s bus service more accessible, we can increase participation

4. Methods Equipment – 3 handheld GPS recievers (Garmin etrex) – Digital Camera – GPS Software and PC Fieldwork – 3 waypoints for each bus stop – 5 min at each waypoint – Photo of each bus stop

5. Methods Cont. Data Analysis – Data download – Matlab Average coordinates Statistics and error calculations Google Maps Integration – Import waypoints – Photo-tagging – Interactive timetable

6. Overview GPS Receiver GPS Waypoints Matlab Analysis Google Earth KMZ file with timetable and photographs Google EarthMetro Timetable Digital Photos

7. Project Specification Absolute Accuracy of 6m – Bus usually stops within ~6m of sign – Rte. Markers usually within plain sight Interactive Google Map – Route – Picture – Timetable link

8. Results Average Error: 5.24m Outlier: Lake and Langdon – Error: 330.59m – Visual Inspection revealed two waypoints at a considerable distance from ground position

10. Waypoint: 8505 Loc: Randall & Eng. Drive Coords: 43.07198, -89.40916333 NS Error: 2.95m EW Error: 0.79m Avg. Error: 1.87m Waypoint: 8500 Loc: Lake & Langod Coords: 43.0722967, -89.40352 NS Error: 327.14m EW Error: 334.77m Avg. Error:330.95

11. Final Bus Map

12. Google Maps

13. Conclusions Needed more waypoints and follow-up measurements to increase accuracy Allot more time to fieldwork Silver Etrex is better and easier than yellow

14. Future Work Map all bus stops in Madison Integrate with online timetable search – Bus Stop IDs in metadata – Algorithm for directions / transfers Look at bus users before and after interactive bus map

15. Questions?