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In a GIS mapping system, _______ of data can be turned on and off for viewing or printing.

  1. Graphs

  2. Layers

  3. Charts

  4. Files

The correct answer is: Layers

In a Geographic Information System (GIS) mapping system, data is organized in layers, which allows users to manage and visualize various types of information effectively. Each layer can represent different data sets, such as topography, land use, transportation networks, or demographic information. This capability to turn layers on and off enhances the user's ability to focus on specific types of data without the clutter of unrelated information. This layering system simplifies complex spatial analysis and supports a more tailored view of the geographical data being studied. For example, one might want to view only the road networks by turning off other layers like water bodies or land use patterns. This functionality is essential for detailed analysis and effective presentation of spatial information. The other options presented—graphs, charts, and files—do not inherently possess the layered structure that allows for selective visibility within a GIS framework. Graphs and charts are visual representations of data, while files typically refer to the storage of data rather than a method of organizing it for interactive analysis in a mapping environment.