American Institute of Certified Planners (AICP) Practice Exam

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What is the primary function of Digital Elevation Models (DEMs) in planning?

To measure population density
To analyze and map elevation data
To forecast budget impacts
To calculate land use changes

The correct answer is: To analyze and map elevation data

Digital Elevation Models (DEMs) serve a crucial role in planning by providing a detailed representation of the Earth's surface elevation. This elevation data is fundamental for various analyses related to topography and terrain, which in turn can inform decisions related to land use, environmental management, and infrastructure development. The primary function of DEMs is to analyze and map elevation data, which allows planners to visualize the terrain, assess flood risks, plan transportation routes, and evaluate the suitability of land for development or conservation. By understanding the topography through DEMs, planners can make better-informed decisions that consider natural features, drainage patterns, and other physical characteristics of the landscape. This information can significantly influence zoning regulations, environmental protection efforts, and the design of public works projects. Other options, while relevant to planning activities, do not align with the core function of DEMs. Utilizing DEMs specifically addresses the need for spatial data regarding elevation, making option B the most accurate choice in the context of planning.