_____ maps have a green shade that is used to indicate turbulence.

_____ maps have a green shade that is used to indicate turbulence.

• A. Rainbow maps
• B. Variance
• C. Color maps
• D. Flow maps

Answer: (B)

How color shading communicates data variability on maps. Variance maps are specifically designed to show how much a variable changes across different areas. The green shade is used as part of the color ramp to signal turbulence, meaning higher variability or fluctuations in that region. This visual cue lets you quickly identify where the data are most unsettled or inconsistent. Other map types serve different purposes. Rainbow maps rely on a broad, multi-hued palette that can be visually striking but may distort perception of true differences. Generic color maps describe data without focusing on variability, and flow maps depict movement or direction rather than turbulence. The variance map, with its green shading for turbulence, is the best fit when the goal is to highlight variability across space.

How color shading communicates data variability on maps. Variance maps are specifically designed to show how much a variable changes across different areas. The green shade is used as part of the color ramp to signal turbulence, meaning higher variability or fluctuations in that region. This visual cue lets you quickly identify where the data are most unsettled or inconsistent.

Other map types serve different purposes. Rainbow maps rely on a broad, multi-hued palette that can be visually striking but may distort perception of true differences. Generic color maps describe data without focusing on variability, and flow maps depict movement or direction rather than turbulence. The variance map, with its green shading for turbulence, is the best fit when the goal is to highlight variability across space.