iSDAsoil Extractable Sulfur
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Доступность набора данных 2001-01-01T00:00:00Z–2017-01-01T00:00:00Z Поставщик наборов данных iSDA Фрагмент Earth Engine ee.Image("ISDASOIL/Africa/v1/sulphur_extractable") open_in_new Теги сера в почве африканского ISDA Описание Извлекаемая сера на глубине почвы 0-20 см и 20-50 см, прогнозируемое среднее значение и стандартное отклонение.
Значения пикселей должны быть обратно преобразованы с помощью exp(x/10)-1 .
В районах густых джунглей (как правило, в Центральной Африке) точность модели низкая, поэтому могут быть видны такие артефакты, как полосатость.
Прогнозы свойств почвы были сделаны компанией Innovative Solutions for Decision Agriculture Ltd. (iSDA) с размером пикселя 30 м с использованием машинного обучения в сочетании с данными дистанционного зондирования и обучающим набором из более чем 100 000 проанализированных образцов почвы.
Дополнительную информацию можно найти в разделе часто задаваемых вопросов и технической документации . Чтобы сообщить о проблеме или запросить поддержку, посетите сайт iSDAsoil .
Группы Размер пикселя
Группы
Имя Единицы Мин. Макс Размер пикселя Описание mean_0_20 частей на миллион 3 42 метров Сера, извлекаемая, прогнозируемое среднее на глубине 0-20 см
mean_20_50 частей на миллион 0 39 метров Сера, извлекаемая, прогнозируемое среднее на глубине 20–50 см
stdev_0_20 частей на миллион 1 37 метров Сера, извлекаемая, стандартное отклонение на глубине 0–20 см
stdev_20_50 частей на миллион 3 41 метров Сера, извлекаемая, стандартное отклонение на глубине 20–50 см
Условия эксплуатации Условия эксплуатации
CC-BY-4.0
Цитаты Хенгль, Т., Миллер, М.А.Э., Крижан, Дж. и др. Свойства и питательные вещества африканских почв, картированные с пространственным разрешением 30 м с использованием двухмасштабного ансамблевого машинного обучения. Sci Rep 11, 6130 (2021). doi:10.1038/s41598-021-85639-y
Исследуйте с Earth Engine Важно: Earth Engine — это платформа для научного анализа и визуализации геопространственных данных петабайтного масштаба, предназначенная как для общественного пользования, так и для коммерческих и государственных организаций. Earth Engine можно использовать бесплатно в исследовательских, образовательных и некоммерческих целях. Чтобы начать работу, зарегистрируйтесь для получения доступа к Earth Engine. Редактор кода (JavaScript)
var mean_0_20 =
'<RasterSymbolizer>' +
'<ColorMap type="ramp">' +
'<ColorMapEntry color="#0D0887" label="0-2.3" opacity="1" quantity="12"/>' +
'<ColorMapEntry color="#350498" label="2.3-3.1" opacity="1" quantity="14"/>' +
'<ColorMapEntry color="#5402A3" label="3.1-3.5" opacity="1" quantity="15"/>' +
'<ColorMapEntry color="#7000A8" label="3.5-4" opacity="1" quantity="16"/>' +
'<ColorMapEntry color="#8B0AA5" label="4-5" opacity="1" quantity="18"/>' +
'<ColorMapEntry color="#A31E9A" label="5-5.7" opacity="1" quantity="19"/>' +
'<ColorMapEntry color="#B93289" label="5.7-6.4" opacity="1" quantity="20"/>' +
'<ColorMapEntry color="#CC4678" label="6.4-7.2" opacity="1" quantity="21"/>' +
'<ColorMapEntry color="#DB5C68" label="7.2-8" opacity="1" quantity="22"/>' +
'<ColorMapEntry color="#E97158" label="8-9" opacity="1" quantity="23"/>' +
'<ColorMapEntry color="#F48849" label="9-10" opacity="1" quantity="24"/>' +
'<ColorMapEntry color="#FBA139" label="10-11.2" opacity="1" quantity="25"/>' +
'<ColorMapEntry color="#FEBC2A" label="11.2-12.5" opacity="1" quantity="26"/>' +
'<ColorMapEntry color="#FADA24" label="12.5-15.4" opacity="1" quantity="28"/>' +
'<ColorMapEntry color="#F0F921" label="15.4-125" opacity="1" quantity="30"/>' +
'</ColorMap>' +
'<ContrastEnhancement/>' +
'</RasterSymbolizer>' ;
var mean_20_50 =
'<RasterSymbolizer>' +
'<ColorMap type="ramp">' +
'<ColorMapEntry color="#0D0887" label="0-2.3" opacity="1" quantity="12"/>' +
'<ColorMapEntry color="#350498" label="2.3-3.1" opacity="1" quantity="14"/>' +
'<ColorMapEntry color="#5402A3" label="3.1-3.5" opacity="1" quantity="15"/>' +
'<ColorMapEntry color="#7000A8" label="3.5-4" opacity="1" quantity="16"/>' +
'<ColorMapEntry color="#8B0AA5" label="4-5" opacity="1" quantity="18"/>' +
'<ColorMapEntry color="#A31E9A" label="5-5.7" opacity="1" quantity="19"/>' +
'<ColorMapEntry color="#B93289" label="5.7-6.4" opacity="1" quantity="20"/>' +
'<ColorMapEntry color="#CC4678" label="6.4-7.2" opacity="1" quantity="21"/>' +
'<ColorMapEntry color="#DB5C68" label="7.2-8" opacity="1" quantity="22"/>' +
'<ColorMapEntry color="#E97158" label="8-9" opacity="1" quantity="23"/>' +
'<ColorMapEntry color="#F48849" label="9-10" opacity="1" quantity="24"/>' +
'<ColorMapEntry color="#FBA139" label="10-11.2" opacity="1" quantity="25"/>' +
'<ColorMapEntry color="#FEBC2A" label="11.2-12.5" opacity="1" quantity="26"/>' +
'<ColorMapEntry color="#FADA24" label="12.5-15.4" opacity="1" quantity="28"/>' +
'<ColorMapEntry color="#F0F921" label="15.4-125" opacity="1" quantity="30"/>' +
'</ColorMap>' +
'<ContrastEnhancement/>' +
'</RasterSymbolizer>' ;
var stdev_0_20 =
'<RasterSymbolizer>' +
'<ColorMap type="ramp">' +
'<ColorMapEntry color="#fde725" label="low" opacity="1" quantity="1"/>' +
'<ColorMapEntry color="#5dc962" label=" " opacity="1" quantity="3"/>' +
'<ColorMapEntry color="#20908d" label=" " opacity="1" quantity="4"/>' +
'<ColorMapEntry color="#3a528b" label=" " opacity="1" quantity="6"/>' +
'<ColorMapEntry color="#440154" label="high" opacity="1" quantity="14"/>' +
'</ColorMap>' +
'<ContrastEnhancement/>' +
'</RasterSymbolizer>' ;
var stdev_20_50 =
'<RasterSymbolizer>' +
'<ColorMap type="ramp">' +
'<ColorMapEntry color="#fde725" label="low" opacity="1" quantity="1"/>' +
'<ColorMapEntry color="#5dc962" label=" " opacity="1" quantity="3"/>' +
'<ColorMapEntry color="#20908d" label=" " opacity="1" quantity="4"/>' +
'<ColorMapEntry color="#3a528b" label=" " opacity="1" quantity="6"/>' +
'<ColorMapEntry color="#440154" label="high" opacity="1" quantity="14"/>' +
'</ColorMap>' +
'<ContrastEnhancement/>' +
'</RasterSymbolizer>' ;
var raw = ee . Image ( "ISDASOIL/Africa/v1/sulphur_extractable" );
Map . addLayer (
raw . select ( 0 ). sldStyle ( mean_0_20 ), {},
"Sulphur extractable, mean visualization, 0-20 cm" );
Map . addLayer (
raw . select ( 1 ). sldStyle ( mean_20_50 ), {},
"Sulphur extractable, mean visualization, 20-50 cm" );
Map . addLayer (
raw . select ( 2 ). sldStyle ( stdev_0_20 ), {},
"Sulphur extractable, stdev visualization, 0-20 cm" );
Map . addLayer (
raw . select ( 3 ). sldStyle ( stdev_20_50 ), {},
"Sulphur extractable, stdev visualization, 20-50 cm" );
var converted = raw . divide ( 10 ). exp (). subtract ( 1 );
var visualization = { min : 0 , max : 20 };
Map . setCenter ( 25 , - 3 , 2 );
Map . addLayer ( converted . select ( 0 ), visualization , "Sulphur extractable, mean, 0-20 cm" ); Открыть в редакторе кода
[null,null,[],[[["\u003cp\u003eThis dataset provides the predicted mean and standard deviation of extractable sulfur at soil depths of 0-20 cm and 20-50 cm for Africa.\u003c/p\u003e\n"],["\u003cp\u003eThe data covers the period from 2001 to 2017 and was produced by Innovative Solutions for Decision Agriculture Ltd.(iSDA).\u003c/p\u003e\n"],["\u003cp\u003ePixel values are stored in a transformed format and require back-transformation using the formula \u003ccode\u003eexp(x/10)-1\u003c/code\u003e to obtain actual sulfur values in ppm.\u003c/p\u003e\n"],["\u003cp\u003eModel accuracy is reduced in areas of dense jungle, particularly in central Africa, potentially leading to visual artifacts.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is available under the CC-BY-4.0 license.\u003c/p\u003e\n"]]],[],null,["# iSDAsoil Extractable Sulfur\n\nDataset Availability\n: 2001-01-01T00:00:00Z--2017-01-01T00:00:00Z\n\nDataset Provider\n:\n\n\n [iSDA](https://isda-africa.com/)\n\nTags\n:\n [africa](/earth-engine/datasets/tags/africa) [isda](/earth-engine/datasets/tags/isda) [soil](/earth-engine/datasets/tags/soil) \nsulfur \n\n#### Description\n\nExtractable sulfur at soil depths of 0-20 cm and 20-50 cm,\npredicted mean and standard deviation.\n\nPixel values must be back-transformed with `exp(x/10)-1`.\n\nIn areas of dense jungle (generally over central Africa), model accuracy is\nlow and therefore artifacts such as banding (striping) might be seen.\n\nSoil property predictions were made by\n[Innovative Solutions for Decision Agriculture Ltd. (iSDA)](https://isda-africa.com/)\nat 30 m pixel size using machine learning coupled with remote sensing data\nand a training set of over 100,000 analyzed soil samples.\n\nFurther information can be found in the\n[FAQ](https://www.isda-africa.com/isdasoil/faq/) and\n[technical information documentation](https://www.isda-africa.com/isdasoil/technical-information/). To submit an issue or request support, please visit\n[the iSDAsoil site](https://isda-africa.com/isdasoil).\n\n### Bands\n\n\n**Pixel Size**\n\n30 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Pixel Size | Description |\n|---------------|-------|-----|-----|------------|-----------------------------------------------------------|\n| `mean_0_20` | ppm | 3 | 42 | meters | Sulfur, extractable, predicted mean at 0-20 cm depth |\n| `mean_20_50` | ppm | 0 | 39 | meters | Sulfur, extractable, predicted mean at 20-50 cm depth |\n| `stdev_0_20` | ppm | 1 | 37 | meters | Sulfur, extractable, standard deviation at 0-20 cm depth |\n| `stdev_20_50` | ppm | 3 | 41 | meters | Sulfur, extractable, standard deviation at 20-50 cm depth |\n\n### Terms of Use\n\n**Terms of Use**\n\n[CC-BY-4.0](https://spdx.org/licenses/CC-BY-4.0.html)\n\n### Citations\n\nCitations:\n\n- Hengl, T., Miller, M.A.E., Križan, J., et al. African soil properties and nutrients\n mapped at 30 m spatial resolution using two-scale ensemble machine learning.\n Sci Rep 11, 6130 (2021).\n [doi:10.1038/s41598-021-85639-y](https://doi.org/10.1038/s41598-021-85639-y)\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 mean_0_20 =\n'\u003cRasterSymbolizer\u003e' +\n '\u003cColorMap type=\"ramp\"\u003e' +\n '\u003cColorMapEntry color=\"#0D0887\" label=\"0-2.3\" opacity=\"1\" quantity=\"12\"/\u003e' +\n '\u003cColorMapEntry color=\"#350498\" label=\"2.3-3.1\" opacity=\"1\" quantity=\"14\"/\u003e' +\n '\u003cColorMapEntry color=\"#5402A3\" label=\"3.1-3.5\" opacity=\"1\" quantity=\"15\"/\u003e' +\n '\u003cColorMapEntry color=\"#7000A8\" label=\"3.5-4\" opacity=\"1\" quantity=\"16\"/\u003e' +\n '\u003cColorMapEntry color=\"#8B0AA5\" label=\"4-5\" opacity=\"1\" quantity=\"18\"/\u003e' +\n '\u003cColorMapEntry color=\"#A31E9A\" label=\"5-5.7\" opacity=\"1\" quantity=\"19\"/\u003e' +\n '\u003cColorMapEntry color=\"#B93289\" label=\"5.7-6.4\" opacity=\"1\" quantity=\"20\"/\u003e' +\n '\u003cColorMapEntry color=\"#CC4678\" label=\"6.4-7.2\" opacity=\"1\" quantity=\"21\"/\u003e' +\n '\u003cColorMapEntry color=\"#DB5C68\" label=\"7.2-8\" opacity=\"1\" quantity=\"22\"/\u003e' +\n '\u003cColorMapEntry color=\"#E97158\" label=\"8-9\" opacity=\"1\" quantity=\"23\"/\u003e' +\n '\u003cColorMapEntry color=\"#F48849\" label=\"9-10\" opacity=\"1\" quantity=\"24\"/\u003e' +\n '\u003cColorMapEntry color=\"#FBA139\" label=\"10-11.2\" opacity=\"1\" quantity=\"25\"/\u003e' +\n '\u003cColorMapEntry color=\"#FEBC2A\" label=\"11.2-12.5\" opacity=\"1\" quantity=\"26\"/\u003e' +\n '\u003cColorMapEntry color=\"#FADA24\" label=\"12.5-15.4\" opacity=\"1\" quantity=\"28\"/\u003e' +\n '\u003cColorMapEntry color=\"#F0F921\" label=\"15.4-125\" opacity=\"1\" quantity=\"30\"/\u003e' +\n '\u003c/ColorMap\u003e' +\n '\u003cContrastEnhancement/\u003e' +\n'\u003c/RasterSymbolizer\u003e';\n\nvar mean_20_50 =\n'\u003cRasterSymbolizer\u003e' +\n '\u003cColorMap type=\"ramp\"\u003e' +\n '\u003cColorMapEntry color=\"#0D0887\" label=\"0-2.3\" opacity=\"1\" quantity=\"12\"/\u003e' +\n '\u003cColorMapEntry color=\"#350498\" label=\"2.3-3.1\" opacity=\"1\" quantity=\"14\"/\u003e' +\n '\u003cColorMapEntry color=\"#5402A3\" label=\"3.1-3.5\" opacity=\"1\" quantity=\"15\"/\u003e' +\n '\u003cColorMapEntry color=\"#7000A8\" label=\"3.5-4\" opacity=\"1\" quantity=\"16\"/\u003e' +\n '\u003cColorMapEntry color=\"#8B0AA5\" label=\"4-5\" opacity=\"1\" quantity=\"18\"/\u003e' +\n '\u003cColorMapEntry color=\"#A31E9A\" label=\"5-5.7\" opacity=\"1\" quantity=\"19\"/\u003e' +\n '\u003cColorMapEntry color=\"#B93289\" label=\"5.7-6.4\" opacity=\"1\" quantity=\"20\"/\u003e' +\n '\u003cColorMapEntry color=\"#CC4678\" label=\"6.4-7.2\" opacity=\"1\" quantity=\"21\"/\u003e' +\n '\u003cColorMapEntry color=\"#DB5C68\" label=\"7.2-8\" opacity=\"1\" quantity=\"22\"/\u003e' +\n '\u003cColorMapEntry color=\"#E97158\" label=\"8-9\" opacity=\"1\" quantity=\"23\"/\u003e' +\n '\u003cColorMapEntry color=\"#F48849\" label=\"9-10\" opacity=\"1\" quantity=\"24\"/\u003e' +\n '\u003cColorMapEntry color=\"#FBA139\" label=\"10-11.2\" opacity=\"1\" quantity=\"25\"/\u003e' +\n '\u003cColorMapEntry color=\"#FEBC2A\" label=\"11.2-12.5\" opacity=\"1\" quantity=\"26\"/\u003e' +\n '\u003cColorMapEntry color=\"#FADA24\" label=\"12.5-15.4\" opacity=\"1\" quantity=\"28\"/\u003e' +\n '\u003cColorMapEntry color=\"#F0F921\" label=\"15.4-125\" opacity=\"1\" quantity=\"30\"/\u003e' +\n '\u003c/ColorMap\u003e' +\n '\u003cContrastEnhancement/\u003e' +\n'\u003c/RasterSymbolizer\u003e';\n\nvar stdev_0_20 =\n'\u003cRasterSymbolizer\u003e' +\n '\u003cColorMap type=\"ramp\"\u003e' +\n '\u003cColorMapEntry color=\"#fde725\" label=\"low\" opacity=\"1\" quantity=\"1\"/\u003e' +\n '\u003cColorMapEntry color=\"#5dc962\" label=\" \" opacity=\"1\" quantity=\"3\"/\u003e' +\n '\u003cColorMapEntry color=\"#20908d\" label=\" \" opacity=\"1\" quantity=\"4\"/\u003e' +\n '\u003cColorMapEntry color=\"#3a528b\" label=\" \" opacity=\"1\" quantity=\"6\"/\u003e' +\n '\u003cColorMapEntry color=\"#440154\" label=\"high\" opacity=\"1\" quantity=\"14\"/\u003e' +\n '\u003c/ColorMap\u003e' +\n '\u003cContrastEnhancement/\u003e' +\n'\u003c/RasterSymbolizer\u003e';\n\nvar stdev_20_50 =\n'\u003cRasterSymbolizer\u003e' +\n '\u003cColorMap type=\"ramp\"\u003e' +\n '\u003cColorMapEntry color=\"#fde725\" label=\"low\" opacity=\"1\" quantity=\"1\"/\u003e' +\n '\u003cColorMapEntry color=\"#5dc962\" label=\" \" opacity=\"1\" quantity=\"3\"/\u003e' +\n '\u003cColorMapEntry color=\"#20908d\" label=\" \" opacity=\"1\" quantity=\"4\"/\u003e' +\n '\u003cColorMapEntry color=\"#3a528b\" label=\" \" opacity=\"1\" quantity=\"6\"/\u003e' +\n '\u003cColorMapEntry color=\"#440154\" label=\"high\" opacity=\"1\" quantity=\"14\"/\u003e' +\n '\u003c/ColorMap\u003e' +\n '\u003cContrastEnhancement/\u003e' +\n'\u003c/RasterSymbolizer\u003e';\n\nvar raw = ee.Image(\"ISDASOIL/Africa/v1/sulphur_extractable\");\nMap.addLayer(\n raw.select(0).sldStyle(mean_0_20), {},\n \"Sulphur extractable, mean visualization, 0-20 cm\");\nMap.addLayer(\n raw.select(1).sldStyle(mean_20_50), {},\n \"Sulphur extractable, mean visualization, 20-50 cm\");\nMap.addLayer(\n raw.select(2).sldStyle(stdev_0_20), {},\n \"Sulphur extractable, stdev visualization, 0-20 cm\");\nMap.addLayer(\n raw.select(3).sldStyle(stdev_20_50), {},\n \"Sulphur extractable, stdev visualization, 20-50 cm\");\n\nvar converted = raw.divide(10).exp().subtract(1);\n\nvar visualization = {min: 0, max: 20};\n\nMap.setCenter(25, -3, 2);\n\nMap.addLayer(converted.select(0), visualization, \"Sulphur extractable, mean, 0-20 cm\");\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/ISDASOIL/ISDASOIL_Africa_v1_sulphur_extractable) \n[iSDAsoil Extractable Sulfur](/earth-engine/datasets/catalog/ISDASOIL_Africa_v1_sulphur_extractable) \nExtractable sulfur at soil depths of 0-20 cm and 20-50 cm, predicted mean and standard deviation. Pixel values must be back-transformed with exp(x/10)-1. In areas of dense jungle (generally over central Africa), model accuracy is low and therefore artifacts such as banding (striping) might be seen. Soil property predictions were ... \nISDASOIL/Africa/v1/sulphur_extractable, africa,isda,soil \n2001-01-01T00:00:00Z/2017-01-01T00:00:00Z \n-35.22 -31.46 37.98 57.08 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://isda-africa.com/)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/ISDASOIL_Africa_v1_sulphur_extractable)"]]
