Geographic Data and Mapping Flashcards

What does the MAKELINE() spatial function produce in Tableau?

Answer: A line connecting two spatial points

MAKELINE() generates a line geometry between two spatial points, useful for origin-destination flow maps.

When using a dual-axis map, what must you do to the second axis to keep both layers aligned?

Answer: Synchronize the axis (choose Dual Axis so they share the same scale)

Dual-axis maps automatically share the same coordinate space so both layers register correctly.

Which geographic role aggregates data by U.S. metropolitan statistical areas?

Answer: CBSA/MSA

The CBSA/MSA role maps data to Core-Based Statistical Areas / Metropolitan Statistical Areas.

How can you add a custom geocoding for locations Tableau does not recognize natively?

Answer: Import custom geocoding via Map > Geocoding > Import Custom Geocoding

Tableau lets you import a CSV of custom latitude/longitude geocoding to extend recognized locations.

What is the effect of placing a measure on the Size shelf of a symbol map?

Answer: Marks are sized proportionally to the measure (proportional symbol map)

Putting a measure on Size scales each mark by its value, creating a proportional symbol map.

Which option lets you restrict the map to only show a specific region and disable panning/zooming for viewers?

Answer: Map Options (Map > Map Options) settings like washout and zoom controls

Map Options control map behavior such as showing zoom controls, search, scale, and washout.

What does the BUFFER() spatial function return in Tableau?

Answer: A circular polygon around a point at a given radius

BUFFER() draws a circular area of a specified radius around a spatial point, useful for radius analysis.