Evolution - Programming GPS and OpenStreetMap Applications with Java - page 216

vides a number of scenarios as appetizers and some guidelines to keep in
mind for the ROAF.
Looking at the OSM map features might inspire your imagination to
add your own rules. For example, the trac lights can be extracted from
OSM and come alive in the scenario. A trac management system could
be implemented as a new component of a City ROServer. Then, every
participating RO would be required to listen to the signals and stop at red.
The number and meaning of map features can be implemented gradually.
Autobahn (MRE) Scenario
The Navigator s GER map is highly simplified and should be refined to the
actual road geometry. In Germany, the Autobahn is the highest-level road
(Interstate) and represents the network for overland traveling. Like Ger-
many, every country has major roads, and it would not pose any new issues
to extract the major roads of Europe (MRE) for the entire continent.
Driving across countries takes time and burns fuel. Therefore, a MRE
game scenario could introduce a fuel capacity for each RealVehicle and im-
plicitly define a traveling range. Why not add gas stations to the scenario?
Then the route planing would have to consider gas stations (and opening
hours) to travel long distances.
If the ROs want to leave the continent, they will need boats or airplanes.
Similar to the MRE network, boots and planes also travel on well-defined
routes and would not require any new ROAF technology.
Cab Caller App
The Scotland Yard game board has a taxi feature for selected roads. Nev-
ertheless, the game does not really need cab, bus, and subway vehicles; it
therefore has to be harmonized to be eligible to be part of the ROAF.
The CityChase scenario should introduce the three vehicle types in addi-
tion to the players. Since a cab should be available for every player at every
cab station, their density should be higher than that of the players; one cab
per player is not sucient, since a cab can't catch up with the player, if
he takes the subway. A RealCab fleet could implement its own intelligence
to spread over the game scenario and cover all cab stations (taxi stands)
reachable by any player.
Actually most cab companies are already prepared for a real-world \cab
caller." Most cabs are traced with GPS and their signals are available at
the cab company's headquarters. These signals can be fed into a cab caller
ROApp to show the RealCab s driving through the city. The customer could
look at the city map and click on the closest cab to call it. Once the driver
is informed, the ROApp can return the estimated time of arrival (ETA).