Multi-scale Topographic Position Index (mTPI) for Sky Islands Ecoregion

Jan 6, 2016 (Last modified Jan 8, 2016)
Uploaded by David Theobald
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Dataset was used in a scientifically peer-reviewed publication
Description:
These data provide a robust indicator of topographic position by calculating a multi-scale Topographic Position Index (mTPI) value at each location (30 m resolution). TPI is calculated as the elevation at a given location minus the mean elevation within some neighborhood around the location, so the units are interpretable as meters of elevational difference. We calculated TPI using radii of 270, 810, and 2430, and mTPI is the average TPI for those three neighborhoods. Note that this is used as the basis for classifying a natural sequence of topographic units along the catena: ridges/peaks (summits), upper slopes (shoulders), lower slopes (foot slopes), and valley bottoms (toe slopes).
Data Provided By:
David M. Theobald, Dylan Harrison-Atlas, Christine M. Albano, William B. Monahan
Content date:
not specified
Citation:
Theobald DM, Harrison-Atlas D, Monahan WB, Albano CM. 2015. Ecologically-relevant maps of landforms and physiographic diversity for climate adaptation planning. PLOS ONE. DOI: 10.1371/journal.pone.0143619
Spatial Resolution:
30 meters
Contact Organization:
Conservation Science Partners, Inc. 
www.csp-inc.org
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Creative Commons LicenseThis work is licensed under a Creative Commons Attribution-NonCommercial 3.0 License.
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Tags:
mtpi, multi-scale topographic position index, sky islands ecoregion
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About the Uploader

David Theobald
Senior Scientist with Conservation Planning Technologies

Conservation science