| title | date | author |
|---|---|---|
Testing for High Frequency Noise in DEMs Using FFTs |
January 2017 |
Ben Purinton ([[email protected]]([email protected])) |
Note: This analysis has been migrated to Python as of May 2020: https://github.com/bpurinton/DEM-FFT
Proceed below if you want to work with MATLABTM.
This MATLABTM function is intended for the spectral analysis of gridded topographic data (DEMs) for analysis of high-frequency, low-wavelength noise as presented in:
Purinton, B., and Bookhagen, B.: Validation of digital elevation models (DEMs) and geomorphic metrics on the southern Central Andean Plateau, Earth Surface Dynamics, 2017. (https://doi.org/10.5194/esurf-5-211-2017)
Prior to analysis the user must download and set path to a few required functions:
-
The 2DSpecTools package from T. Perron available here
- For background on this spectral analysis procedure and the paper that spurred this analysis refer to: Perron, J. T., Kirchner, J. W., and Dietrich, W. E.: Spectral signatures of characteristic spatial scales and nonfractal structure in landscapes, Journal of Geophysical Research, 113, 2008. https://doi.org/10.1029/2007JF000866
-
The TopoToolbox package from W. Schwanghart available here
- Schwanghart, W., and Scherler, D.: Short Communication: TopoToolbox 2 – MATLAB-based software for topographic analysis and modeling in Earth surface sciences, Earth Surface Dynamics, 2, 1-7, 2014. https://doi.org/10.5194/esurf-2-1-2014