GIS Basics
📋 What it is
A Geographic Information System (GIS) stacks layers of map data — roads, rivers, population — so patterns pop out.
🗣️ Coach says
GIS is a map made of transparent layers. Put population on one layer and flood risk on another, line them up, and you instantly see who’s in danger. It’s how cities, scientists and rescuers turn data into decisions.
🧠 Memory hook
GIS = map layers stacked. Line up the layers, the pattern appears.
😂 Giggle
Why was the equator so popular at school?
It was right in the center of everything.
😲 Whoa!
Emergency crews use GIS to see which homes sit in a flood zone or fire path before disaster strikes — and to plan escape routes.
✅ Quick check: How does layering different kinds of map data (a GIS) help someone make a decision?
Say your answer out loud first — then reveal.
Stacking layers (like population + flood zones) reveals where problems overlap, so people can act — evacuate, build, or plan.
GIS is modern geography’s core tool; grasping the layer idea is what matters.
🧪 Try it! (2 minutes)
Name two “layers” a city planner might stack on a map to decide where to build a school.