Social Studies: GIS and Modern Mapping Tools Worksheet

Question 1

A city planner uses GIS to decide where to build a new public library. Name three map layers that would help the planner make a fair and useful decision, and explain why each layer matters.

Accepted Answer

Useful layers could include population density, public transit routes, and current library locations. Population density shows where many residents live, transit routes show whether people can reach the library without a car, and current library locations help identify neighborhoods that are underserved.

Question 2

A GIS map shows flood zones, school locations, and household income by census tract. Explain how this map could help local government improve disaster planning.

Accepted Answer

The map could help local government identify schools located in flood zones and neighborhoods with fewer resources for evacuation or recovery. Officials could prioritize emergency shelters, transportation support, warning systems, and infrastructure improvements in the areas at greatest risk.

Question 3

Define geocoding in your own words and give one example of how it might be used in social studies research.

Accepted Answer

Geocoding is the process of turning an address or place name into a map location, usually with coordinates. A researcher could geocode voter registration addresses to study whether polling places are evenly distributed across a city.

Question 4

A map app shows a grocery store as 2 miles away in a straight line, but the driving route is 3.4 miles. Explain why the two distances are different and which one is more useful for planning a trip.

Accepted Answer

The straight-line distance measures only the direct distance between two points, while the driving route follows actual roads, turns, and barriers. The driving distance is more useful for planning a trip because it reflects the path a person can actually travel.

Question 5

Study this situation: A county overlays three GIS layers: locations of medical clinics, areas with high numbers of older adults, and areas more than 30 minutes from a hospital. What pattern should officials look for, and what action might they take?

Accepted Answer

Officials should look for areas with many older adults that are far from hospitals and have few or no nearby clinics. They might open a new clinic, add mobile health services, or improve transportation to medical care in those areas.

Question 6

Explain the difference between a raster data layer and a vector data layer in GIS. Give one example of each.

Accepted Answer

A raster layer is made of grid cells or pixels and is useful for continuous data such as elevation or satellite imagery. A vector layer uses points, lines, or polygons and is useful for features such as schools, roads, or city boundaries.

Question 7

A student makes a map of internet access by neighborhood. The map uses darker colors for higher percentages of households with broadband. What type of thematic map is this, and what is one caution when interpreting it?

Accepted Answer

This is a choropleth map because it shades areas based on a data value. One caution is that large areas can look more important than small areas, even if fewer people live there, so the viewer should consider population size and data classification.

Question 8

Remote sensing often uses satellites or aircraft to collect data. Describe one way remote sensing could help researchers study urban growth over time.

Accepted Answer

Remote sensing could help researchers compare satellite images from different years to see where farmland, forests, or open land changed into buildings, roads, and parking lots. This allows them to measure the spread of urban development over time.

Question 9

A GIS analyst is mapping crime incidents in a city. Explain why it is important to protect privacy when displaying this data, and describe one method the analyst could use.

Accepted Answer

It is important to protect privacy because exact incident locations could reveal personal information about victims, witnesses, or residents. The analyst could aggregate the data by neighborhood or census tract instead of showing exact addresses.

Question 10

A map scale says 1 inch equals 5 miles. Two parks are 3.5 inches apart on the map. Calculate the real-world distance between the parks and explain your calculation.

Accepted Answer

The real-world distance between the parks is 17.5 miles. Since 1 inch equals 5 miles, multiplying 3.5 inches by 5 miles per inch gives 17.5 miles.

Social Studies: GIS and Modern Mapping Tools

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