1017
Extracting Information from LiDAR (ENVI LiDAR 200 - 1 day)
LiDAR data contains boundless information on terrain and 3D features. Knowing how to effectively work with LiDAR so that you can quickly get the information you need from it is vital to getting the most out of your investment. In this course you will learn how you can use the LiDAR tools in ENVI to extract 3D features and elevation-based products quickly and easily. ENVI support the most common LiDAR formats such as LAS, Binary, ASCII, and NITF LiDAR. With ENVI you can generate elevation products such as Digital Surface Models (DSMs), Digital Elevation Models (DEMs), and digital elevation contours. ENVI also automatically extracts 3D features from LiDAR point clouds such as buildings, trees, power lines, and power poles. p>
Prerequisite: A basic understanding of LiDAR data is useful but not necessary. Some experience with remote sensing and/or GIS software is useful but not necessary.
Overview of LiDAR Concepts & Terminology
- Introduction to LiDAR
- LiDAR Terminology
- Using the Computer Based Training (CBT)
Scenario 1 – Oahu, Hawaii Working with LiDAR Point Clouds
- Working with public domain data
- Basic LiDAR point cloud display
- Visualizing the LiDAR point cloud with color
- Measuring distances and angles
- Cross Sections
- Evaluating coverage and density
- Generating a DEM and Contours
- Pushing products to ENVI & ArcGIS
Scenario 2 – Haiti Earthquake Using LiDAR for Disaster Response
- Setting up a Project
- Setting Preferences
- Evaluating coverage and density
- Setting Processing Parameters
- Processing
- Quality Assurance
- Tips for QA
- Building vector correction
- Tree changes
- DEM corrections
- Point classification editing
- Using the 3D viewer for QA
- Navigating and flying in 3D
Scenario 3 – Boulder, CO Using LiDAR and Imagery for Fire Mitigation
- Tips for QA
- Building vector correction
- Tree changes
- DEM corrections
- Power line vector editing
- Power pole placement
- Point classification editing
- Using the 3D viewer for QA
- Navigating and flying in 3D
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Scenario 4 – Boulder, CO Using LiDAR for Flood Plain Mapping
- Processing
- Coloring by height
- Height palette editor
- Generating Contours
- Google Earth KML
Scenario 5 – Mount Saint Helens DEMs in rugged terrain
- DEM advanced parameters
- Generating contour lines from a DEM
- Pushing Products to ENVI
- Change Detection
Scenario 6 Power lines
- In depth exercises on power pole and power line extraction
- QA mode with center line
- Buffering power lines in ENVI
- Buffering power lines in ArcScene
Preview of Extending LiDAR with IDL
- Overview of the Application Programming Interface (API)
- Some simple examples
View our Classroom Training Calendar
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