GIS is a very useful tool for geologists. Which statement best describes its primary purpose?

• A. It replaces fieldwork
• B. It stores only maps
• C. It enables overlaying multiple information for risk/resource determinations
• D. It cannot integrate hydrological data

Answer: (C)

GIS brings together different spatial datasets and lets you analyze how they relate to each other. Its strength lies in layering multiple information—such as geology, topography, hydrology, soils, land use, and hazard maps—and evaluating how those layers interact to inform decisions about risks and resource potential. That ability to overlay diverse datasets and derive actionable insights is what geologists rely on when assessing hazards, zoning, groundwater, mineral resources, and environmental impacts.

So the best description is that GIS enables overlaying multiple information for risk/resource determinations. It does not replace fieldwork, it isn’t limited to storing maps, and it can integrate hydrological data as part of its analyses.