Global SRTM Topographic Diversity (CSP/ERGo/1_0/Global/SRTM_topoDiversity)

Version 1.0

Topographic diversity (D) is a surrogate variable that represents the
variety of temperature and moisture conditions available to species as local
habitats. It expresses the logic that a higher variety of topo-climate
niches should support higher diversity (especially plant) and support
species persistence given climatic change.

To calculate D, the multi-scale Topographic Position Index (mTPI), being a
dominant control of soil moisture (T), was used for measuring hillslope
position. The mTPI was combined with the square-root transform for
mTPI>0 (T’) and with the standard deviation of the Continuous
Heat-Insolation Load Index (CHILI), calculated at multiple scales (C’) as:
D = 1 – ((1-T’) * (1-C’). It is based on the 30m SRTM DEM (available in EE
as USGS/SRTMGL1_003).

constantSRTM-derived topographic diversity


Conservation Science Partners (producer, licensor)
Google Earth Engine (host)
STAC Version 0.6.0
Keywords aspect, csp, elevation, ergo, geophysical, global, landforms, slope, topography
License proprietary
Temporal Extent 1/23/2006, 4:00:00 PM - 5/12/2011, 5:00:00 PM
Citation Theobald, D. M., Harrison-Atlas, D., Monahan, W. B., & Albano, C. M. (2015). Ecologically-relevant maps of landforms and physiographic diversity for climate adaptation planning. PloS one, 10(12), [e0143619](
Type image
GSD metersm