Aerial Photos and Satellite Imagery
Understanding Remote Sensing in Geography
Aerial photographs and satellite images help geographers study places without standing on the ground. In Grade 10 mapwork, learners use them to identify features, compare views of the same area, and understand how remote sensing supports mapping.
1. Types of Aerial Photographs
Aerial photographs are classified based on the angle at which the camera points toward the ground.
2. Orthophoto Maps (1:10 000)
An orthophoto is a specialized type of vertical aerial photograph that has been digitally corrected to remove distortions.
3. Satellite Imagery
Satellite imagery is captured by sensors on orbiting spacecraft rather than from planes or drones.
Entire continents
Infrared, radar
Time-series data
4. Interpretation Skills
Shape and Size
Tone and Colour
Texture
Shadows
Provide insights into building heights and time of day.
Comparison: Aerial vs Satellite
| Feature | Aerial Photos | Satellite Imagery |
|---|---|---|
| Platform | Planes, drones | Spacecraft |
| Coverage | Small areas | Large areas, continents |
| Resolution | Very high detail | Variable |
| Data Types | Visual photographs | Visual, infrared, radar |
Practice Games
Test your understanding of aerial photos and satellite imagery
Which type of aerial photograph is taken with the camera pointing straight down?
Orthophoto maps have a contour interval of 20 metres.
Click a term, then click its definition
Choose the correct answer to complete the sentence.
Drag the correct word to complete the sentence.
Choose the correct answer.
Conclusion
The important exam idea is to know what each image type shows best. Learners should be able to distinguish vertical and oblique photos, explain what makes an orthophoto useful, and identify why satellite imagery is valuable for large-scale observation.
