Global ALOS mTPI (Multi-Scale Topographic Position Index)

CSP/ERGo/1_0/Global/ALOS_mTPI
Dataset Availability
2006-01-24T00:00:00 - 2011-05-13T00:00:00
Dataset Provider
Earth Engine Snippet
ee.Image("CSP/ERGo/1_0/Global/ALOS_mTPI")
Tags
landforms elevation slope aspect geophysical topography global csp ergo

Description

The mTPI distinguishes ridge from valley forms. It is calculated using elevation data for each location subtracted by the mean elevation within a neighborhood. mTPI uses moving windows of radius (km): 115.8, 89.9, 35.5, 13.1, 5.6, 2.8, and 1.2. It is based on the 30m "AVE" band of JAXA's ALOS DEM (available in EE as JAXA/ALOS/AW3D30_V1_1).

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.

Bands

Resolution
270 meters

Bands

Name Units Min Max Description
AVE Meters -3758* 10963*

ALOS-derived mTPI ranging from negative (valleys) to positive (ridges) values

* estimated min or max value

Terms of Use

Terms of Use

This dataset is available to use under the Creative Commons BY-NC-SA license.

Citations

Citations:
  • 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

Explore in Earth Engine

var dataset = ee.Image('CSP/ERGo/1_0/Global/ALOS_mTPI');
var alosMtpi = dataset.select('AVE');
var alosMtpiVis = {
  min: -200.0,
  max: 200.0,
  palette: ['0b1eff', '4be450', 'fffca4', 'ffa011', 'ff0000'],
};
Map.setCenter(-105.8636, 40.3439, 11);
Map.addLayer(alosMtpi, alosMtpiVis, 'ALOS mTPI');

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