Purpose: Way v2 is a personal mapping system that continuously displays the user's location.

Abbreviations, Acronyms and Definitions:

GPS	Global Positioning System
GUI	Graphical User Interface

About the System: Version 2 of Way is being designed/developed for/by Nearby. It is envisioned as the second release of a personal navigation system.

Some Contextual Information: The following design documents exist:

• Needs Statement for Version 2

The GUI team has developed a new version of the following class:

Drafter ( Byte Code ) (Documentation)

In addition, the GPS team has developed the following two interfaces:

GPSObserver ( Byte Code ) (Documentation)

GPSSubject ( Byte Code ) (Documentation)

and the following class that you must use to simulate the behavior of the GPS receiver:

GPSStreamReader ( Byte Code ) (Documentation)

The data team has created the following "digital map" files that can be used for testing purposes:

Streets in Rockingham County, VA (and relevant cities)
Streets in Fairfax County, VA (and relevant cities)


These file were created from the US Census Bureau's TIGER Boundary Files. They use the following road-type codes:

TIGER Road Type Codes


The data team has also created the following file containing NMEA-0183 sentences:

Trip in Rockingham County, VA


This file was created by recording the output from a GPS receiver (without modifying it in any way) while driving in the Rockingham area.

The system must satisfy the following operational requirements:

OR-1 The system must display the map at a scale that allows a passenger to help the driver navigate. (see Needs S-1)

OR-2 The system must display vehicle's current location (obtained from a GPSSubject) on the map in real time. (see Needs S-2)

OR-3 The system must "scroll" or "pan" the map when the vehicle moves outside the range of the current display. (see Needs S-2)