US NED CHILI (Continuous Heat-Insolation Load Index)

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aspect csp elevation ergo geophysical landforms slope topography us


CHILI is a surrogate for effects of insolation and topographic shading on evapotranspiration represented by calculating insolation at early afternoon, sun altitude equivalent to equinox. It is based on the USGS's 10m NED DEM (available in EE as USGS/NED).

The Conservation Science Partners (CSP) Ecologically Relevant Geomorphology (ERGo) Datasets, Landforms and Physiography contain detailed, multi-scale data on landforms and physiographic (aka land facet) patterns. Although there are many potential uses of these data, the original purpose for these data was to develop an ecologically relevant classification and map of landforms and physiographic classes that are suitable for climate adaptation planning. Because there is large uncertainty associated with future climate conditions and even more uncertainty around ecological responses, providing information about what is unlikely to change offers a strong foundation for managers to build robust climate adaptation plans. The quantification of these features of the landscape is sensitive to the resolution, so we provide the highest resolution possible given the extent and characteristics of a given index.


10 meters


Name Min Max Description
constant 0 255

NED-derived CHILI index ranging from 0 (very cool) to 255 (very warm). This was rescaled from the [0,1] range in the publication.

Terms of Use

Terms of Use



  • 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

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Code Editor (JavaScript)

var dataset = ee.Image('CSP/ERGo/1_0/US/CHILI');
var usChili ='constant');
var usChiliVis = {
  min: 0.0,
  max: 255.0,
Map.setCenter(-105.8636, 40.3439, 11);
Map.addLayer(usChili, usChiliVis, 'US CHILI');
Open in Code Editor