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UAS-Based Mapping: Photogrammetric Approach
About this courseSkip About this course
The continuous developments in direct geo-referencing (i.e., integrated Global Navigation Satellite Systems – GNSS – and Inertial Navigation Systems – INS) and remote sensing (i.e., passive and active imaging sensors in the visible and infrared range – RGB cameras and laser scanning) is providing the professional geospatial community with ever-growing opportunities to provide accurate 3D information with rich set of attributes. These advances are also coupled with improvement in the sensors’ performance, reduction in the associated cost, and miniaturization of such sensors. Aside from the sensing systems, we are also enjoying the emerging of promising platforms such as Unmanned Airborne Vehicles (UAVs). UAVs equipped with consumer-grade imaging/ranging and direct geo-referencing systems have been proven as a potential remote sensing platform that could satisfy the needs of a wide range of civilian applications. The advantages of UAV-based mapping can be attributed to the following facts: a) they can fly at lower elevation and slower speed than manned aircraft, thus providing high-quality spatial data; b) they can be cost-effectively stored and deployed, which make them optimal for rapid response applications; c) they are easy to use with minimal training requirements; d) they can provide repetitive mapping at higher frequency with minimal cost; and e) they are less affected by weather conditions (e.g., they can fly under cloud cover). In spite of the proven potential of UAVs, the nature of their use in mapping applications can be describes as ad-hoc at best. This course is focusing on the principles and mathematical details of photogrammetric 3D reconstruction from imaging systems onboard UAVs.
At a glance
- Institution: PurdueX
- Subject: Engineering
- Level: Intermediate
Learners interested in taking this course should have successfully completed the edX course, UAS-Based Mapping: Basic Principles or equivalent.
Students should also have knowledge in geometry, trigonometry, linear algebra, differential calculus, and have the ability to develop MATLAB scripts, or gain the ability during the course with help provided.
- Language: English
- Video Transcript: English
What you'll learnSkip What you'll learn
Explain the principles of image-based mapping.
Identify/select systems/sensors/platforms and design flight plan to meet the needs of a specific application.
Conduct a UAS-based mapping project using an imaging system.
Evaluate the quality of UAS-based photogrammetric products.
- Point Positioning Equations
- Camera & System Calibration
- Theory of Orientation
- Aerial Triangulation
- Structure from Motion (SfM)
- Orthophoto Generation