Surveying and mapping with photogrammetry in Drone Programming - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is photogrammetry in the context of surveying and mapping?

Photogrammetry is the process of using photos, often taken by drones, to measure and create maps or 3D models of land and objects.

beginner

Why are drones useful for photogrammetry in surveying?

Drones can fly over areas quickly and capture many overlapping photos from different angles, which helps create accurate maps and 3D models.

intermediate

What is the importance of overlapping images in photogrammetry?

Overlapping images allow software to find common points between photos, which helps calculate distances and build accurate 3D models or maps.

intermediate

Name a common output product of photogrammetry used in surveying.

Common outputs include orthomosaic maps (flat, corrected images), digital elevation models (3D surface models), and point clouds (3D points representing surfaces).

advanced

What programming tasks might be involved in drone photogrammetry workflows?

Tasks include automating drone flight paths, controlling camera settings, processing images with photogrammetry software, and exporting map data.

What does photogrammetry primarily use to create maps?

A Satellite signals

B Photos taken from different angles

C Manual measurements with tape

D Radar waves

Photogrammetry uses photos taken from different angles to measure and map areas.

Why is image overlap important in photogrammetry?

A It helps software find matching points between images

B It reduces the number of photos needed

C It makes photos look brighter

D It saves drone battery life

Overlap allows software to match points in different photos to build accurate 3D models.

Which of these is NOT a typical output of photogrammetry?

A Text document

B Orthomosaic map

C Point cloud

D Digital elevation model

Photogrammetry outputs are visual or spatial data, not text documents.

What role does programming play in drone photogrammetry?

A Manually drawing maps

B Painting the drone

C Automating drone flights and image processing

D Flying the drone by hand

Programming helps automate drone control and image processing tasks.

Which device is most commonly used to capture images for photogrammetry in surveying?

A Laser scanner only

B Smartphone without camera

C Handheld GPS only

D Drone with camera

Drones equipped with cameras capture the images needed for photogrammetry.

Explain how drones and photogrammetry work together to create maps.

Think about flying, taking pictures, and building maps.

Describe the programming steps involved in automating a drone photogrammetry mission.

Consider what the drone and software need to do automatically.