GI3691 Subject code deals with the semester VI Subject Airborne And Terrestrial Laser Mapping syllabus of Anna University 2021 Revised regulation syllabus of B.E Geo Informatics Engineering. It is provided based on the student’s point of view to prepare well for academic examinations.
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Aim Of Concept:
- To introduce the concepts of Space Borne, Air Borne, Terrestrial and Bathymetric LASER Scanners for Topographic and Bathymetric Mapping
GI3691- Airborne And Terrestrial Laser Mapping Syllabus
Unit I: Space Borne Radar And Lidar Altimeter
Principle and Properties of LASER- Production of Laser – Components of LASER – LiDAR – Types of LiDAR:Range Finder, DIAL and Doppler LiDAR – Platforms: Terrestrial, Airborne and Space borne LiDAR – Space Borne LiDAR Missions – Space Borne Radar Altimeter for mapping Sea Surface Topography, Moon Topography – Merits of ALS in comparison to Levelling, echo sounding, GPS leveling, Photogrammetry and Interferometry
Unit II: Airborne Laser Scanners
Airborne Topographic Laser Scanner – Ranging Principle – Pulse Laser and Continuous Wave Laser –First Return and Last Return – Ellipsoidal and Geoidal Height – Typical parameters of Airborne Laser Scanner (ALS) – Specifications of Commercial ALS –- Components of ALS – GPS, IMU, LASER Scanner, Imaging Device, Hardware and Software – Various Scanning Mechanisms: Oscillating Mirror, Rotating Polygon, Nutating Mirror, Fibre Optic
Unit III: Data Acquisition And Pre-Processing
Laser Classification – Class I to Class IV Laser – Eye Safety – Synchronization of GPS, IMU and ALS Data -Reflectivity of terrain objects –- Flight Planning – Determination of various data acquisition parameters – Swath Width, Point Density, No. of Strips, Area Covered, Point Spacing – Data Processing – Determination of optimal flight trajectory- Quality Assurance
Unit IV: Post-Processing Of LIDAR Data
Post Processing – Geolocation of Laser Foot Prints – Various Co-ordinate Transformations involved Filtering – Ground Point filtering – Digital Surface Model and Digital Elevation Model – LIDAR data file formats – LAS File format and other proprietary file formats – Post Processing Software: Open Source and COTS Software – Quality Control Measures – Error Budget – Overview of LIDAR Applications in various domains – 3D city models – Corridor Mapping Applications – Forestry Applications.
Unit V: Terrestrial Laser Scanners
Terrestrial Laser Scanners (TLS) – Working Principle – Static TLS – Dynamic TLS –-– Commercial TLS Specifications – Mobile Mapping Lasers: Vehicle Mounted TLS, Back Pack Wearable Laser Scanners – Asset Management Studies – Highways and Railway Asset Management – Indoor Mapping: Laser Scanning of interior of buildings/monuments – Immersive Applications – BIM Model – Applications in Tunnel Surveying, Forest Inventory, Open Cast Mine Surveying
Textbooks:
- Jie Shan, Charles K. Toth, “Topographic Laser Ranging and Scanning – Principles and Processing”, 2nd Edition, CRC Press Publication, March 2018. ISBN: 9781498772273.
References:
- George Vosselman and Hans-Gerd Maas, Airborne and Terrestrial Laser Scanning, WhittlesPublishing, 2010
- Matti Maltamo, Erik Næsset, JariVauhkonen, Forestry Applications of Airborne Laser Scanning-Concepts and Case Studies, Springer, Dordrecht, 2016, Reprint Edition. ISBN 978-94- 017-8662-1
- Michael Renslow, Manual of Airborne Topographic LiDAR, The American Society for Photogrammetry and Remote Sensing, 2013
Related Posts On Semester -VI:
- GI3601 – Geospatial analysis with R programming
- GI3611 – Spatial Analysis and Applications Laboratory
- GI3612 – Survey Camp (2 Weeks)