What you will make

A simple demographic map plus a small table documenting geography, period, units, and available uncertainty information.

A demographic comparison can change when its boundaries, years, or population universe change. A town, county, tract, and ZIP-based geography are different units. A careful profile helps a project team discuss context without substituting available data for the place they actually mean.

• Select a dataset and variable while retaining their geographic and time context.
• Distinguish a count, percentage, and estimate with reported uncertainty.
• Describe a limited comparison without inventing town-level coverage.

Work through the method

1. Define the actual place

   Name the requested study area and geography. Record availability gaps. A county, tract, or ZIP-based area must not silently substitute for town boundaries.

   Check your work: Requested and available geographic units are explicit.

2. Confirm access and start a map

   Use UVA's licensed-resource route if eligible, then open Maps. The help page places Change data in the upper-left area for category and year browsing.

   Check your work: Access works or its limitation is recorded.

3. Choose a comparable measure

   Select a variable and record dataset, definition, year or period, units, and population universe. Keep counts distinct from percentages and multi-year periods distinct from single-year observations.

   Check your work: Headers accurately describe the measure and period.

4. Retain uncertainty and gaps

   Inspect source reports for MOE, missing values, suppression, and notes. Preserve uncertainty when supplied; otherwise record unavailable. Do not assume universal MOE availability or confidence levels.

   Check your work: Values retain reported uncertainty or a gap note.

5. Compare carefully

   Check boundaries, period, definitions, units, and source before comparing places. Describe small differences cautiously when uncertain; an area average does not characterize every resident.

   Check your work: The comparison identifies its limits.

6. Save an interpretable output

   Use Save and Export as an image where available. Add geography, period, source, caption, and a readable table or text alternative; inspect the actual export.

   Check your work: The export remains interpretable alongside its context.

Prepare a two-place demographic comparison

1. Define two comparable geographic areas without substituting a different geography silently.
2. Select one variable and record dataset, reference period, definition, units, and universe.
3. Retain reported MOE and missing-data notes, or record unavailable.
4. Export a map and save a table with a cautious comparison caption.

Bring the method into a product

• PNG map with source, period, and geography caption
• CSV demographic table with uncertainty and comparability notes

Suggested formats: PNG, CSV, PDF.

Reflect: Which specific difference in geography, release or uncertainty changed your comparison? Explain one planning implication and one conclusion the data cannot support.

Avoid these mistakes

• Licensed UVA access depends on eligibility and is not universally free.
• Different boundaries, periods, units, or universes can make values incomparable.
• An absent margin of error is not evidence of a perfectly certain estimate.