NCSU GIS/MEA582:
Geospatial Modeling and Analysis

5. Geomorphometry

5.A Terrain modeling

Outline:
  • 3D mapping technologies: topography and bathymetry
  • mathematical and digital terrain models
  • point clouds, multiple return data, CLICK, LDART
  • triangular irregular networks
  • regular grid (raster), NED, SRTM, CRM
  • isolines

Lecture

Slides and recorded video:

Supplemental materials:

Assignment A:

5.B Spatial and temporal terrain analysis

Outline:
  • summary parameters: volumes, surface areas
  • first and second order point parameters: general approach
  • methods for slope, aspect and curvatures using polynomial and spline approximation
  • combining parameters to map landforms and terrain features
  • computing parameters from noisy data, accuracy and uncertainty, scale and level of detail
  • raster time series analysis, quantification of coastal change

Lecture

Slides and recorded video:

Supplemental materials:

Assignment B

Homework 5. A and B

Prepare a paper on properties of lidar data and on computing topographic parameters from digital elevation models. Discuss how the topographic analysis methods and types of DEM influence the result. Describe results of elevation time series analysis.