Der mTPI unterscheidet zwischen Bergkamm- und Talformen. Er wird anhand von Höhendaten für jeden Standort berechnet, von denen die durchschnittliche Höhe in einem Stadtteil abgezogen wird. Für den mTPI werden gleitende Fenster mit folgenden Radien (in km) verwendet: 115,8, 89,9, 35,5, 13,1, 5,6, 2,8 und 1,2. Es basiert auf dem 10‑m-NED-DEM der USGS (verfügbar in EE als USGS/NED).
Die Datasets „Ecologically Relevant Geomorphology“ (ERGo) von Conservation Science Partners (CSP), „Landforms“ und „Physiography“ enthalten detaillierte, mehrskalige Daten zu Landformen und physiografischen (auch als Landfacetten bezeichneten) Mustern. Obwohl diese Daten viele potenzielle Verwendungsmöglichkeiten haben, war der ursprüngliche Zweck, eine ökologisch relevante Klassifizierung und Karte von Landformen und physiografischen Klassen zu entwickeln, die für die Planung der Klimaanpassung geeignet sind. Da zukünftige Klimabedingungen mit großer Unsicherheit behaftet sind und die ökologischen Reaktionen noch unsicherer sind, bietet die Bereitstellung von Informationen darüber, was sich wahrscheinlich nicht ändern wird, eine solide Grundlage für die Entwicklung robuster Klimaanpassungspläne. Die Quantifizierung dieser Landschaftsmerkmale hängt von der Auflösung ab. Daher stellen wir die höchstmögliche Auflösung bereit, die angesichts des Umfangs und der Merkmale eines bestimmten Index möglich ist.
Bänder
Pixelgröße 270 Meter
Bänder
Name
Einheiten
Min.
Max.
Pixelgröße
Beschreibung
elevation
m
-378
493
Meter
Aus NED abgeleiteter mTPI-Wert, der von negativen (Täler) bis zu positiven (Kämme) Werten reicht
Theobald, D. M., Harrison-Atlas, D., Monahan, W. B., & Albano, C. M.
(2015). Ökologisch relevante Karten von Landformen und physiografischer Vielfalt für die Planung der Klimaanpassung. PloS one, 10(12),
e0143619
Der mTPI unterscheidet zwischen Bergkamm- und Talformen. Er wird anhand von Höhendaten für jeden Standort berechnet, von denen die durchschnittliche Höhe in einer Umgebung abgezogen wird. Für den mTPI werden gleitende Fenster mit folgenden Radien (in km) verwendet: 115,8, 89,9, 35,5, 13,1, 5,6, 2,8 und 1,2. Es basiert auf dem 10‑Meter-NED-DEM des USGS (verfügbar in …
[null,null,[],[[["\u003cp\u003eThe CSP ERGo US mTPI dataset provides a multi-scale topographic position index (mTPI) for the United States, distinguishing ridges from valleys.\u003c/p\u003e\n"],["\u003cp\u003eIt's calculated using elevation data and the mean elevation within varying neighborhood radii (1.2 km to 115.8 km), based on the USGS 10m NED DEM.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset is useful for climate adaptation planning, landform analysis, and ecological studies, offering insights into physiographic patterns.\u003c/p\u003e\n"],["\u003cp\u003eThe data is available at a 270-meter resolution and covers the period from January 24, 2006, to May 13, 2011.\u003c/p\u003e\n"],["\u003cp\u003eDeveloped by Conservation Science Partners, it is licensed under CC-BY-NC-SA-4.0 and available through Google Earth Engine.\u003c/p\u003e\n"]]],["The dataset, provided by Conservation Science Partners, contains multi-scale landform and physiographic data, specifically the US multi-scale Topographic Position Index (mTPI), derived from USGS elevation data. mTPI distinguishes ridges and valleys, calculated by subtracting a location's elevation from the mean elevation within moving windows of varying radii. The dataset spans 2006-01-24 to 2011-05-13, is available through Earth Engine, and includes an elevation band with a 270-meter pixel size.\n"],null,["# US NED mTPI (Multi-Scale Topographic Position Index)\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) [landforms](/earth-engine/datasets/tags/landforms) [slope](/earth-engine/datasets/tags/slope) [topography](/earth-engine/datasets/tags/topography) [us](/earth-engine/datasets/tags/us) \n\n#### Description\n\nThe mTPI distinguishes ridge from valley forms. It is calculated using\nelevation data for each location subtracted by the mean elevation within a\nneighborhood. mTPI uses moving windows of radius (km): 115.8, 89.9, 35.5,\n13.1, 5.6, 2.8, and 1.2. It is based on the USGS's 10m NED DEM (available\nin EE as USGS/NED).\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 | Units | Min | Max | Pixel Size | Description |\n|-------------|-------|------|-----|------------|------------------------------------------------------------------------------|\n| `elevation` | m | -378 | 493 | meters | NED-derived mTPI ranging from negative (valleys) to positive (ridges) values |\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/US/mTPI');\nvar usMtpi = dataset.select('elevation');\nvar usMtpiVis = {\n min: -200.0,\n max: 200.0,\n palette: ['0b1eff', '4be450', 'fffca4', 'ffa011', 'ff0000'],\n};\nMap.setCenter(-105.8636, 40.3439, 11);\nMap.addLayer(usMtpi, usMtpiVis, 'US mTPI');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/CSP/CSP_ERGo_1_0_US_mTPI) \n[US NED mTPI (Multi-Scale Topographic Position Index)](/earth-engine/datasets/catalog/CSP_ERGo_1_0_US_mTPI) \nThe 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 USGS's 10m NED DEM (available in ... \nCSP/ERGo/1_0/US/mTPI, aspect,csp,elevation,elevation-topography,ergo,geophysical,landforms,slope,topography,us \n2006-01-24T00:00:00Z/2011-05-13T00:00:00Z \n12.54 -132.09 56.21 -60.35 \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_US_mTPI)"]]
