Instructors: Matthew Beckley, UNAVCO, Inc.; Chelsea Scott, Arizona State University

Course Description:

AGIC announcement for course:

In this hands-on session, we will begin with an introduction to airborne lidar technology focusing on the basics of data acquisition, point clouds, point classification and filtering, and digital elevation model (DEM) generation and processing. We will then use OpenTopography (https://opentopography.org/) for a series of hands-on activities where participants will follow along and explore datasets of interest. OpenTopography is an NSF-funded project that streamlines discovery, access, and processing of open-access, high resolution topography datasets. Participants will use OpenTopography to process and examine different attributes of point clouds, construct raster DEMs, and perform topographic differencing on multi-temporal datasets to examine landscape change. As time and interest permit, we may do an additional demo with the open source CloudCompare software (http://www.cloudcompare.org/) which supports visualization and computations of lidar point clouds and other 3D datasets.

Outline:

• Introductions (8:30-8:45)
• Lecture: Intro to Lidar (8:45-9:15)
  

  Intro to Lidar and OpenTopography (125 MB)
• Hands on – Point Clouds 3D Viz Potree treasure hunt. (9:15-9:45)
  

  3D viz for Salt Lake City, Boulder, Prescott, and the Kaibab Plateau 3D viz treasure hunt 3D viz treasure hunt answers
• For 3D Viz: Use Chrome or Firefox browsers. Clear Cache. To view a different dataset: Click the Menu Button (three bars on left) and scroll down to samples.
  • Break (9:45-9:55)
  • Lecture: Creating DEMs and derived raster products (9:55-10:15)
  • Hands on – OT Workflow (10:15-10:45)
  • Break (10:45-10:55)
  • Download slides for topographic differencing here:
    

    Differencing Short Course Slides

    • Hands on: Topographic Differencing (10:55-11:05)
    • Lecture: Topographic Differencing (11:05-11:25)
    • Hands on: Topographic Differencing (11:25-11:35)
    • Hands on: Questions/revisit topics of interest/General (11:35-12:00)

    Example Jobs:

    SW Kaibab: https://portal.opentopography.org/rasterOutput?jobId=rt1570144059010

    Mt Hood: https://portal.opentopography.org/lidarOutput?jobId=pc1570146673358

    Iowa City: https://portal.opentopography.org/lidarOutput?jobId=pc1570149177372

    Indianapolis Speedway: https://portal.opentopography.org/lidarOutput?jobId=pc1570149277325

    Meteor Crater: https://portal.opentopography.org/rasterOutput?jobId=rt1570149377500

    Sunset Crater https://portal.opentopography.org/lidarOutput?jobId=pc1570195957482

    Southern Sierras https://portal.opentopography.org/lidarOutput?jobId=pc1570195611536