Thematic Maps and GIS
Make and interpret thematic maps: choropleth, dot and flow maps of population, rainfall or trade; use GIS layers and satellite imagery to spot spatial patterns and ask why they occur
What a learner can do afterwards
- Interpret a choropleth map (e.g., reading a population-density map and naming the most and least crowded regions)
- Choose a sensible map type for a data set (e.g., a flow map for exports, a dot map for earthquakes)
- Overlay layers in a digital mapping or GIS tool to explore a pattern (e.g., comparing rainfall and farmland layers)
The lesson
A regular map shows you where things are: countries, rivers, roads. A thematic map picks one topic, like population, rainfall, or trade, and shows it clearly using color, dots, or arrows across the map.
A map that shades regions by color like that is called a choropleth map. Each region gets a color, and a legend tells you what the colors mean. Darker usually means more of something, lighter usually means less. Always check the legend first, then compare shades across regions.
Mia is mapping earthquakes from last year. Each earthquake happens at one exact spot, not spread across a whole region, so she picks a dot map: one dot per earthquake, instead of shading whole areas.
In a GIS tool, you can stack layers like clear sheets on top of a map: one for rainfall, one for farmland. Laying them over each other lets you see if farms cluster where rain is high, then ask why that pattern happens.
Thematic maps use color, dots, or arrows to show one kind of information, and GIS layers let you stack maps together to spot patterns and ask why.
Watch it
Where it sits
This opens up
Nothing builds on it yet.
Where this leads
Jobs that lean on this skill. Follow one to see everything it is built on.
8 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.