L'mTPI distingue le forme di cresta da quelle di valle. Viene calcolato utilizzando i dati di elevazione per ogni località sottratti all'elevazione media all'interno di un quartiere. L'indice mTPI utilizza finestre mobili di raggio (km): 115,8, 89,9, 35,5, 13,1, 5,6, 2,8 e 1,2. Si basa sulla banda "AVE" di 30 m del DEM ALOS di JAXA (disponibile in EE come JAXA/ALOS/AW3D30_V1_1).
I set di dati, le forme del terreno e la fisiografia di Conservation Science Partners (CSP) Ecologically Relevant Geomorphology (ERGo) contengono dati dettagliati e multiscala su forme del terreno e pattern fisiografici (noti anche come sfaccettature del terreno). Sebbene
questi dati possano essere utilizzati in molti modi, lo scopo originale era quello di sviluppare una classificazione e una mappa ecologicamente pertinenti di
forme del terreno e classi fisiografiche adatte alla pianificazione dell'adattamento ai cambiamenti climatici. Poiché esiste una grande incertezza associata alle condizioni climatiche future e ancora maggiore incertezza sulle risposte ecologiche, fornire informazioni su ciò che è improbabile che cambi offre una solida base per consentire ai gestori di elaborare piani di adattamento al clima efficaci. La quantificazione di queste caratteristiche del paesaggio è sensibile alla risoluzione, pertanto forniamo la risoluzione più elevata possibile in base all'estensione e alle caratteristiche di un determinato indice.
Bande
Dimensioni pixel 270 metri
Bande
Nome
Unità
Min
Max
Dimensioni dei pixel
Descrizione
AVE
m
-3758*
10963*
metri
mTPI derivato da ALOS compreso tra valori negativi (valli) e positivi (crinali)
Theobald, D. M., Harrison-Atlas, D., Monahan, W. B., & Albano, C. M.
(2015). Mappe ecologicamente rilevanti di morfologie e diversità fisiografica
per la pianificazione dell'adattamento al clima. PloS one, 10(12),
e0143619
L'mTPI distingue le forme di cresta da quelle di valle. Viene calcolato utilizzando i dati di elevazione per ogni località, a cui viene sottratta l'elevazione media all'interno di un quartiere. mTPI utilizza finestre mobili di raggio (km): 115,8, 89,9, 35,5, 13,1, 5,6, 2,8 e 1,2. Si basa sulla banda "AVE" di 30 metri di ALOS di JAXA…
[null,null,[],[[["\u003cp\u003eThe ALOS mTPI dataset provides a global, multi-scale topographic position index derived from ALOS DEM, distinguishing ridges from valleys.\u003c/p\u003e\n"],["\u003cp\u003eIt's calculated by subtracting the mean elevation within a neighborhood from each location's elevation, using moving windows of varying radii.\u003c/p\u003e\n"],["\u003cp\u003eDeveloped by Conservation Science Partners, this dataset is suitable for climate adaptation planning and ecological studies.\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\u003eThe dataset is licensed under CC-BY-NC-SA-4.0 and is accessible through Google Earth Engine.\u003c/p\u003e\n"]]],["The dataset, provided by Conservation Science Partners, spans from 2006-01-24 to 2011-05-13 and features the ALOS Multi-scale Topographic Position Index (mTPI). The mTPI, calculated using elevation data, distinguishes ridges from valleys. It uses moving windows to calculate mean elevation within various radii. The data's primary application was to inform climate adaptation planning, quantifying landscape features with consideration to resolution sensitivity, with a pixel size of 270 meters and ranging from -3758\\* to 10963\\*.\n"],null,["# Global ALOS 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) [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\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 30m \"AVE\" band of JAXA's ALOS\nDEM (available in EE as JAXA/ALOS/AW3D30_V1_1).\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| `AVE` | m | -3758\\* | 10963\\* | meters | ALOS-derived mTPI ranging from negative (valleys) to positive (ridges) values |\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/ALOS_mTPI');\nvar alosMtpi = dataset.select('AVE');\nvar alosMtpiVis = {\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(alosMtpi, alosMtpiVis, 'ALOS mTPI');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/CSP/CSP_ERGo_1_0_Global_ALOS_mTPI) \n[Global ALOS mTPI (Multi-Scale Topographic Position Index)](/earth-engine/datasets/catalog/CSP_ERGo_1_0_Global_ALOS_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 30m \"AVE\" band of JAXA's ALOS ... \nCSP/ERGo/1_0/Global/ALOS_mTPI, 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_ALOS_mTPI)"]]
