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).
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.
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
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 …
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],[],[[["\u003cp\u003eThe dataset provides a global, SRTM-derived topographic diversity index at a 270-meter resolution.\u003c/p\u003e\n"],["\u003cp\u003eTopographic diversity represents the variety of temperature and moisture conditions available to species, serving as a surrogate for habitat variety.\u003c/p\u003e\n"],["\u003cp\u003eIt's calculated using a combination of multi-scale Topographic Position Index (mTPI) and Continuous Heat-Insolation Load Index (CHILI).\u003c/p\u003e\n"],["\u003cp\u003eThis dataset is useful for climate adaptation planning and ecological studies related to species diversity and persistence.\u003c/p\u003e\n"],["\u003cp\u003eThe data is available from January 24, 2006, to May 13, 2011, and is provided by Conservation Science Partners.\u003c/p\u003e\n"]]],["The dataset, provided by Conservation Science Partners, offers global topographic diversity data from 2006-01-24 to 2011-05-13. Calculated using multi-scale Topographic Position Index (mTPI) and the Continuous Heat-Insolation Load Index (CHILI), the data quantifies landform and physiographic patterns at a 270-meter pixel size. This dataset supports climate adaptation planning by providing information about topo-climate niches. Users can access and visualize the 'SRTM_topoDiversity' data in Earth Engine using provided code snippets.\n"],null,["# Global SRTM Topographic Diversity\n\nDataset Availability\n: 2006-01-24T00:00:00Z--2011-05-13T00:00:00Z\n\nDataset Provider\n:\n\n\n [Conservation Science Partners](https://www.csp-inc.org/)\n\nTags\n:\n[aspect](/earth-engine/datasets/tags/aspect) [csp](/earth-engine/datasets/tags/csp) [elevation](/earth-engine/datasets/tags/elevation) [elevation-topography](/earth-engine/datasets/tags/elevation-topography) [ergo](/earth-engine/datasets/tags/ergo) [geophysical](/earth-engine/datasets/tags/geophysical) [global](/earth-engine/datasets/tags/global) [landforms](/earth-engine/datasets/tags/landforms) [slope](/earth-engine/datasets/tags/slope) [topography](/earth-engine/datasets/tags/topography) \n\n#### Description\n\nTopographic diversity (D) is a surrogate variable that represents the\nvariety of temperature and moisture conditions available to species as local\nhabitats. It expresses the logic that a higher variety of topo-climate\nniches should support higher diversity (especially plant) and support\nspecies persistence given climatic change.\n\nTo calculate D, the multi-scale Topographic Position Index (mTPI), being a\ndominant control of soil moisture (T), was used for measuring hillslope\nposition. The mTPI was combined with the square-root transform for\nmTPI\\\u003e0 (T') and with the standard deviation of the Continuous\nHeat-Insolation Load Index (CHILI), calculated at multiple scales (C') as:\nD = 1 - ((1-T') \\* (1-C'). It is based on the 30m SRTM DEM (available in EE\nas USGS/SRTMGL1_003).\n\nThe Conservation Science Partners (CSP) Ecologically Relevant Geomorphology\n(ERGo) Datasets, Landforms and Physiography contain detailed, multi-scale\ndata on landforms and physiographic (aka land facet) patterns. Although\nthere are many potential uses of these data, the original purpose for these\ndata was to develop an ecologically relevant classification and map of\nlandforms and physiographic classes that are suitable for climate adaptation\nplanning. Because there is large uncertainty associated with future climate\nconditions and even more uncertainty around ecological responses, providing\ninformation about what is unlikely to change offers a strong foundation for\nmanagers to build robust climate adaptation plans. The quantification of\nthese features of the landscape is sensitive to the resolution, so we\nprovide the highest resolution possible given the extent and characteristics\nof a given index.\n\n### Bands\n\n\n**Pixel Size**\n\n270 meters\n\n**Bands**\n\n| Name | Min | Max | Pixel Size | Description |\n|------------|------------|--------|------------|------------------------------------|\n| `constant` | -1323.63\\* | 8.81\\* | meters | SRTM-derived topographic diversity |\n\n\\* estimated min or max value\n\n### Terms of Use\n\n**Terms of Use**\n\n[CC-BY-NC-SA-4.0](https://spdx.org/licenses/CC-BY-NC-SA-4.0.html)\n\n### Citations\n\nCitations:\n\n- Theobald, D. M., Harrison-Atlas, D., Monahan, W. B., \\& Albano, C. M.\n (2015). Ecologically-relevant maps of landforms and physiographic diversity\n for climate adaptation planning. PloS one, 10(12),\n [e0143619](https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0143619)\n\n### Explore with Earth Engine\n\n| **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine)\n\n### Code Editor (JavaScript)\n\n```javascript\nvar dataset = ee.Image('CSP/ERGo/1_0/Global/SRTM_topoDiversity');\nvar srtmTopographicDiversity = dataset.select('constant');\nvar srtmTopographicDiversityVis = {\n min: 0.0,\n max: 1.0,\n};\nMap.setCenter(-111.313, 39.724, 6);\nMap.addLayer(\n srtmTopographicDiversity, srtmTopographicDiversityVis,\n 'SRTM Topographic Diversity');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/CSP/CSP_ERGo_1_0_Global_SRTM_topoDiversity) \n[Global SRTM Topographic Diversity](/earth-engine/datasets/catalog/CSP_ERGo_1_0_Global_SRTM_topoDiversity) \nTopographic 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 ... \nCSP/ERGo/1_0/Global/SRTM_topoDiversity, aspect,csp,elevation,elevation-topography,ergo,geophysical,global,landforms,slope,topography \n2006-01-24T00:00:00Z/2011-05-13T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://www.csp-inc.org/)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/CSP_ERGo_1_0_Global_SRTM_topoDiversity)"]]
