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Raster-Based Analysis

Chapter
Part of the SpringerBriefs in Computer Science book series (BRIEFSCOMPUTER)

Abstract

Raster-based analysis on two or more DEMs can provide information about change patterns and trends. A common approach to mapping elevation change between two surveys is DEM differencing, performed by map algebra within GIS (r.mapcalc in GRASS). For a larger number of elevation data snapshots, per cell statistics can be applied to the raster DEMs to derive summary maps, which reveal the spatial patterns of stable and dynamic sites, the time periods when sites reach their highest or lowest elevations, and the trends in elevation change.

Keywords

Sand Dune Elevation Change Core Surface Envelope Surface Raster Cell 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. Mitasova, H., Hardin, E., Overton, M., and Harmon, R. (2009). New spatial measures of terrain dynamics derived from time series of lidar data. Proc. 17th Int. Conf. on Geoinformatics, Fairfax, VA. DOI:  10.1109/GEOINFORMATICS.2009.5293539. Associated animation: http://skagit.meas.ncsu.edu/~helena/gmslab/papers/Core_Envelope_anim.ppt.

Copyright information

© The Author(s) 2014

Authors and Affiliations

  1. 1.Department of PhysicsNorth Carolina State UniversityRaleighUSA
  2. 2.Department of Marine, Earth and Atmospheric SciencesNorth Carolina State UniversityRaleighUSA
  3. 3.Center for Geospatial AnalyticsNorth Carolina State UniversityRaleighUSA
  4. 4.Department of Civil, Construction and Environmental EngineeringNorth Carolina State UniversityRaleighUSA

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