Final answer:
GIS uses computer programs to manage map data, with sources including satellite imagery and applications ranging from cartography to data quality assessment.
Explanation:
Geographic Information Systems (GIS) utilize computer programs to manage map data in layers, providing detailed information about a location. GIS data are digital and organized in various layers that can be analyzed to represent specific features or activities.
Four sources of GIS data include satellite imagery, aerial photography, unmanned aerial systems, and geospatial databases. Four areas where GIS is applied are cartography, geospatial database management, remote sensing, and data quality assessment.
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