GPS and GIS help authorities manage cities by locating assets, combining location data, identifying spatial patterns, and supporting transport, maintenance, planning, and emergency decisions. GPS supplies location data, while GIS organizes and analyses it on digital maps.
Level: Shared by SL and HL.
| Digital system | Main function | Urban application |
|---|---|---|
| Global Positioning System (GPS) | Uses satellite signals to calculate receiver position | Tracks buses, emergency vehicles, maintenance teams, and equipment |
| Geographic Information System (GIS) | Stores, layers, maps, and analyses geospatial data | Maps roads, pipes, buildings, traffic, land use, and flood-risk areas |
The systems often work together. GPS records where an object is, while GIS links that location to other data layers. A city can combine bus locations, passenger demand, road closures, and congestion data to identify delays and adjust routes.
GIS also supports maintenance by mapping the age, condition, and repair history of water pipes or roads, then prioritizing high-risk areas. During emergencies, location data can identify affected areas and efficient response routes.
Real-world example:
System: Transport for London's iBus system uses location and communications technologies to monitor buses.
Example specifics: GPS-based data lets controllers and passengers view bus positions and expected arrival times. Mapping helps Transport for London identify delays and manage services.
Impacts and implications: Real-time information and operational oversight improve transport management. However, detailed location data creates risks involving surveillance, cybersecurity, unequal access, and dependence on accurate data.
Concepts: Interconnected systems can produce intended benefits and unintended consequences. The example also concerns power because transport authorities control how location data is collected and used.
Exam technique: For an explain question, distinguish GPS from GIS and show their causal relationship. For an evaluate question, weigh benefits against privacy, data reliability, cost, and unequal access. Avoid the misconception that GPS and GIS are the same system.
