See it
Every new term arrives with a simple diagram, an everyday example, and why it matters.
Coming soon · Android and web
Learn GIS and remote sensing, from zero.
Start with what a map layer is. Finish reading satellite images like an analyst. A few minutes a day, with a real diagram for every idea.
- No experience needed
- Free to start
- Works offline
Facts checked against open sources such as NASA Earthdata, USGS, Copernicus and NOAA. Not affiliated with any of them.
Starts where you are
New to maps? Use GIS every day? Both start in the right place.
Two quick questions when you open the app, and the path adjusts.
New to GIS
Start at lesson one: what GIS is, what a layer is, how a satellite sees. No jargon until you've met it.
Already use it
Take a 12-question skip-ahead check. Pass it and you skip the Foundations and start where it gets useful.
How it works
A lesson in three moves
Each lesson takes three or four minutes: three new terms, a couple of old ones, and a reason for every answer.
Tell close ideas apart
Wrong options are the ones people really mix up, like GIS and remote sensing. Pick one and you're told why.
Keep it
Mistakes come back until they stick, and spaced review brings each term back before you forget it.
Train, grade, spar
A belt you have to earn
Lessons are the training ground. Belts are earned in a separate exam, the way a real dojo grades you, so a belt means you know it.
Train
A few minutes a day on the path. Short lessons, a practice round and a checkpoint at the end of each unit. Keep your streak going.
Grade
Trained a belt's units? Sit its exam: timed, no hints, 80% to pass. Don't make it, and you can try again the next day.
After launch
Spar
Challenge a friend to a duel: the same ten questions, the best score wins. Leagues come once the dojo fills up.
The path
From your first pixel to analyst-ready
Units by topic, easy to hard. Each one is a few short lessons, a practice round and a checkpoint. Already know a unit? Test out. Each group of units leads to a belt exam.
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Units 1–3 · white belt exam
Foundations: no GIS needed
What GIS is · layers, features and attributes · latitude and longitude · scale · what a satellite sees · pixels and bands · raster and vector
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Unit 4 · yellow belt exam
Reading satellite images
Spatial resolution · panchromatic and multispectral · near-infrared · false colour · spectral signatures · NDVI
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Unit 5 · orange belt exam
Where on Earth
Coordinate systems · datums · map projections · UTM · EPSG codes · Web Mercator · reprojection
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Unit 6 · green belt exam
Making images fit maps
Georeferencing · ground control points · RMSE · elevation models · orthorectification · pansharpening
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Unit 7 · blue belt exam
Sensors in depth
Spectral, radiometric and temporal resolution · hyperspectral · atmospheric correction
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Purple to black belt
On the way
Classification · change detection · radar and lidar · file formats · and later, GeoAI
Why it works
Built on how memory works
- Recall, not rereading. Pulling a term out of memory makes it stick better than reading it again.
- Spaced review. A scheduler (FSRS) tracks every term and brings it back when you're about to forget it.
- Mistakes with a reason. Every answer explains why, and every wrong pick says why not.
- Small and daily. Streaks, a daily goal and short lessons make a few minutes a day easy to keep.
Try it
One question
This is how a question feels in the app.
Choose the term
Data stored as a grid of cells, each holding a value, like the pixels of a photo. What is it?
Who it's for
Anyone who wants to read the Earth
Students
Geography, geoinformatics or environmental science: the terms your courses assume you already know.
Career switchers
A clear, structured path into GIS, from the very first idea to the vocabulary of the job.
Working analysts
Test out of what you know, fill the gaps behind the tools you use, and get ready for interviews.
FAQ
Questions
Do I need to know GIS already?
No. The first units start from what GIS is and what a pixel is. If you already know the basics, a short check lets you skip ahead.
How do belts work?
You don't get a belt for finishing lessons. Train a belt's units on the path, then sit its exam: about 25 questions in 15 minutes, no hints, 80% to pass. White belt first, then yellow, orange, green and blue, with more to come.
Is it free?
The course is free to learn. A paid Pro plan will come later with extras, like an AI tutor and applied challenges with real data. Cancelling will be as easy as subscribing.
When can I use it?
We're building it now. Join the waitlist and you'll get one email when it opens.
Which devices?
Android and the web first. iPhone follows, starting with the web version.
Who writes the content?
Every card is written in our own words, checked against open sources, and reviewed by a working GIS analyst before it ships.
