Week 4: Imagery

Presentation Slides

• Tuesday — Georectifying Images — Giving a scanned map or photo real-world coordinates: control points, transformations, and what can go wrong.
• Thursday — Remote Sensing — How sensors see the Earth: the electromagnetic spectrum, what a digital image stores, splitting images into bands, false color, hyperspectral imagery, and the satellites that take the pictures.

Press F for fullscreen and P for presenter view with speaker notes.

In-Class Practice

• Georeference Your Home (graded, 5 points) — done in class Tuesday; upload a screen capture by 9:30 am, fifteen minutes after class.

Self-check quizzes — not graded; open them on a phone or laptop as often as you like:

• Line It Up — Five questions on putting a scanned image in its place: why you georectify before you digitize, where control points belong, and why a small RMS error is not an accuracy figure.
• Light and Bands — Five questions on what a band is, why vegetation is bright in reflected near-infrared, what makes a display false color, and why no one satellite does everything.

Lab Assignment

Lab 3 — Georectifying and Digitizing Images

Due Saturday at 11:59 pm as one PDF report on Learning Suite — 50 points.

Reading Quiz

Read Chapter 6 of GIS Fundamentals, 7th edition (Bolstad).

Quiz 4 — Remote Sensing on Learning Suite: open book, done independently. Due Saturday at 11:59 pm — 20 points.

Note

If you see a discrepancy between Learning Suite and this page, please let me know so I can rectify it.