Synopsis of Topic
High resolution topographic data that can support change detection now comes from a variety of platforms including:
- Ground Based
- Total Stations
- ground-based LiDaR or Terrestrial Laser Scanning (TLS)
- Structure from Motion (SfM)
- Single-beam SONAR
- Multi-beam SONAR
- Traditinoal NIR LiDaR
- Bathymetric Green LiDaR
- Spectral Depth Correlation
Particularly in the fluvial environment, data from multiple platforms are combined to paint a complete topographic picture of an area.
Why we're Covering it
Although the majority of workshop participants will have some familiarity with topographic data and even surveying, our past experience has shown that the depth of this knowledge is highly variable. Given how fundamental these data sets are to geomorphic change detection, and how rapidly surveying technology is evolving, we feel it is essential to get everyone on the same page. We want to make sure that everyone is broadly aware of the plethora approaches available, their relative tradeoffs in cost, accuracy, and suitability under different conditions and the increasing trend to produce hybrid surveys.
Learning Outcomes Supported
This topic will help fulfill the following primary learning outcome(s)
for the workshop:
A comprehensive overview of the theory underpinning geomorphic change detection
The fundamental background
necessary to design effective repeat topographic monitoring campaigns
and distinguish geomorphic changes from noise (with particular focus on
Slides and/or Handouts
- For a review of some of the aerial imagery see this topic in my GIS class, or this Podcast.
- For a review of TLS, see this topic in my GIS class
- For a review of Total Station and rtkGPS, see this topic in my GIS class
- Bangen SG*, Wheaton JM and Bouwes N. 2014. A methodological intercomparison of topographic survey techniques for characterizing wadeable streams and rivers. Geomorphology. DOI: 10.1016/j.geomorph.2013.10.010.
- Infosheet on Green LiDaR from Jim McKean and Dan Issak of USFS Rocky Mountain Research Station
- Bangen S*, Wheaton JM and DeMeurichy KD. 2011. Methodological Intercomparison of Topographic & Aerial Photographic Habitat Survey Techniques.
Ecogeomorphology and Topographic Analysis Lab, Utah State University,
Prepared for Eco Logical Research and NOAA, Logan, Utah, 33 pp.
- Bangen SG* and Wheaton JM. 2012. CHaMP Crew Variability:
Influence on Topographic Surfaces & Derived Metrics, Report to Eco
Logical Research, Inc. and the Columbia Habitat Monitoring Program,
Logan, Utah, 79 pp.
- Bangen SG*, Wheaton JM, Bouwes N, Jordan C, Volk C and Ward M. 2014 Crew variability in topographic surveys for monitoring wadeable streams: a case study from the Columbia River Basin. Earth Surface Processes and Land Forms. DOI: 10.1002/esp.3600.