Mapping Geographic Data Flashcards

Which map type in Tableau uses color intensity across geographic regions to show a measure?

Answer: Filled (choropleth) map

A filled or choropleth map shades polygons by a measure's value.

Which mark type is required to create a filled map of US states?

Answer: Map

Setting the Marks card to Map fills each geographic area as a polygon.

A symbol map differs from a filled map primarily because it represents data as what?

Answer: Sized/colored marks at point locations

Symbol maps place individual marks (like circles) at locations, often sized by a measure.

Which map type is best for visualizing dense overlapping points such as crime incidents in a city?

Answer: Density (heatmap) map

Density maps reveal hotspots where many marks overlap by blending intensity.

On a symbol map, dragging a measure to Size accomplishes what?

Answer: Scales each mark proportionally to the measure

Placing a measure on Size makes proportional symbol maps where mark area reflects value.

To build a dual-axis map combining filled regions and point symbols, you must do what with Latitude?

Answer: Add two Latitude (generated) pills and select Dual Axis

Two Latitude pills set to Dual Axis layer a filled map beneath symbol marks.

Which map type would you choose to display the value of a single measure as graduated circle sizes by region?

Answer: Proportional symbol map

Proportional symbol maps use circle size to compare a measure across locations.