GIS 101
Nine lessons on Geographic Information Systems — from basic coordinates to spatial analysis and real-world applications.
What Is GIS
GIS is software and methods for working with geographic data. Learn what GIS is, what it is used for, and why it matters.
Read Lesson →Coordinates Explained
Every location on Earth can be described with coordinates. Learn how coordinate systems work and why they matter.
Read Lesson →Map Projections
The Earth is round but maps are flat. Learn how projections work and why choosing the right one matters.
Read Lesson →Geocoding
Geocoding converts addresses into coordinates. Learn how it works and why it is essential for mapping address data.
Read Lesson →Spatial Analysis
Spatial analysis answers questions about location, proximity, and patterns. Learn the core concepts and common techniques.
Read Lesson →GeoJSON
GeoJSON is the standard format for geographic data on the web. Learn its structure and how to work with it.
Read Lesson →Shapefiles Explained
Shapefiles are the most common format for GIS data. Learn what they are, how they work, and when to use them.
Read Lesson →Real World GIS Applications
GIS is used in urban planning, emergency response, environmental monitoring, and business. See how it works in practice.
Read Lesson →