Pengumuman: Semua project nonkomersial yang terdaftar untuk menggunakan Earth Engine sebelum
15 April 2025 harus
memverifikasi kelayakan nonkomersial untuk mempertahankan akses Earth Engine.
ui.Chart.image.seriesByRegion
Tetap teratur dengan koleksi
Simpan dan kategorikan konten berdasarkan preferensi Anda.
Membuat Diagram dari koleksi gambar. Mengekstrak dan memetakan nilai band yang ditentukan di setiap wilayah untuk setiap gambar dalam koleksi. Biasanya berupa deret waktu.
- Sumbu X = Gambar yang diberi label oleh xProperty (default: 'system:time_start').
- Sumbu Y = Output pengurang.
- Series = Wilayah yang diberi label oleh seriesProperty (default: 'system:index').
Menampilkan diagram.
| Penggunaan | Hasil |
|---|
ui.Chart.image.seriesByRegion(imageCollection, regions, reducer, band, scale, xProperty, seriesProperty) | ui.Chart |
| Argumen | Jenis | Detail |
|---|
imageCollection | ImageCollection | ImageCollection dengan data yang akan disertakan dalam diagram. |
regions | Feature|FeatureCollection|Geometry|List<Feature>|List<Geometry> | Wilayah yang akan dikurangi. |
reducer | Pengurang | Reducer yang menghasilkan nilai untuk sumbu y. Harus menampilkan satu nilai. |
band | Number|String, opsional | Nama band yang akan dikurangi menggunakan peredam. Default-nya adalah rentang pertama. |
scale | Nomor, opsional | Skala yang akan digunakan dengan peredam dalam meter. |
xProperty | String, opsional | Properti yang akan digunakan sebagai label untuk setiap gambar pada sumbu x. Defaultnya adalah 'system:time_start'. |
seriesProperty | String, opsional | Properti fitur di opt_regions yang akan digunakan untuk label deret. Nilai defaultnya adalah 'system:index'. |
Contoh
Code Editor (JavaScript)
// Define regions of pixels to reduce and chart a time series for.
var regions = ee.FeatureCollection([
ee.Feature(
ee.Geometry.BBox(-121.916, 37.130, -121.844, 37.076), {label: 'Forest'}),
ee.Feature(
ee.Geometry.BBox(-122.438, 37.765, -122.396, 37.800), {label: 'Urban'})
]);
// Define an image collection time series to chart, MODIS vegetation indices
// in this case.
var imgCol = ee.ImageCollection('MODIS/006/MOD13A1')
.filter(ee.Filter.date('2015-01-01', '2020-01-01'))
.select(['NDVI', 'EVI']);
// Define the chart and print it to the console.
var chart = ui.Chart.image.seriesByRegion({
imageCollection: imgCol,
band: 'NDVI',
regions: regions,
reducer: ee.Reducer.mean(),
scale: 500,
seriesProperty: 'label',
xProperty: 'system:time_start'
})
.setOptions({
title: 'Average NDVI Value by Date',
hAxis: {title: 'Date', titleTextStyle: {italic: false, bold: true}},
vAxis: {
title: 'NDVI (x1e4)',
titleTextStyle: {italic: false, bold: true}
},
lineWidth: 5,
colors: ['0f8755', '808080'],
});
print(chart);
Kecuali dinyatakan lain, konten di halaman ini dilisensikan berdasarkan Lisensi Creative Commons Attribution 4.0, sedangkan contoh kode dilisensikan berdasarkan Lisensi Apache 2.0. Untuk mengetahui informasi selengkapnya, lihat Kebijakan Situs Google Developers. Java adalah merek dagang terdaftar dari Oracle dan/atau afiliasinya.
Terakhir diperbarui pada 2025-07-25 UTC.
[null,null,["Terakhir diperbarui pada 2025-07-25 UTC."],[[["\u003cp\u003eGenerates a chart that visualizes the change in a specific band's value over time within defined regions of an image collection.\u003c/p\u003e\n"],["\u003cp\u003eCharts the reducer output on the y-axis, time (or a specified property) on the x-axis, and uses regions as separate series.\u003c/p\u003e\n"],["\u003cp\u003eOffers customization options for the chart's appearance, such as titles, axes labels, line properties, and series colors, enabling detailed visual representation of the data.\u003c/p\u003e\n"],["\u003cp\u003eUses a reducer to summarize pixel values within each region for every image in the collection, allowing for analysis of trends and patterns.\u003c/p\u003e\n"],["\u003cp\u003eAccepts an image collection, regions of interest, a reducer, and optional parameters for band selection, scale, and property labeling for flexible data analysis and visualization.\u003c/p\u003e\n"]]],["This code generates a chart from an image collection, extracting and plotting band values per region. It uses `ui.Chart.image.seriesByRegion` with parameters: `imageCollection`, `regions`, `reducer`, `band`, `scale`, `xProperty`, and `seriesProperty`. The x-axis represents images labeled by `xProperty`, the y-axis shows the reducer's output, and series are labeled by `seriesProperty`. It takes data from an `imageCollection`, reduces it based on regions, and displays the results in a chart, frequently displaying a time series. An example provided uses MODIS vegetation indices.\n"],null,["# ui.Chart.image.seriesByRegion\n\n\u003cbr /\u003e\n\nGenerates a Chart from an image collection. Extracts and plots the value of the specified band in each region for each image in the collection. Usually a time series.\n\n\u003cbr /\u003e\n\n- X-axis = Image labeled by xProperty (default: 'system:time_start').\n\n- Y-axis = Reducer output.\n\n- Series = Region labeled by seriesProperty (default: 'system:index').\n\nReturns a chart.\n\n| Usage | Returns |\n|-------------------------------------------------------------------------------------------------------------------------------|----------|\n| `ui.Chart.image.seriesByRegion(imageCollection, regions, reducer, `*band* `, `*scale* `, `*xProperty* `, `*seriesProperty*`)` | ui.Chart |\n\n| Argument | Type | Details |\n|-------------------|-------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------|\n| `imageCollection` | ImageCollection | An ImageCollection with data to be included in the chart. |\n| `regions` | Feature\\|FeatureCollection\\|Geometry\\|List\\\u003cFeature\\\u003e\\|List\\\u003cGeometry\\\u003e | The regions to reduce. |\n| `reducer` | Reducer | Reducer that generates the value for the y-axis. Must return a single value. |\n| `band` | Number\\|String, optional | The band name to reduce using the reducer. Defaults to the first band. |\n| `scale` | Number, optional | Scale to use with the reducer in meters. |\n| `xProperty` | String, optional | Property to be used as the label for each image on the x-axis. Defaults to 'system:time_start'. |\n| `seriesProperty` | String, optional | Property of features in opt_regions to be used for series labels. Defaults to 'system:index'. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Define regions of pixels to reduce and chart a time series for.\nvar regions = ee.FeatureCollection([\n ee.Feature(\n ee.Geometry.BBox(-121.916, 37.130, -121.844, 37.076), {label: 'Forest'}),\n ee.Feature(\n ee.Geometry.BBox(-122.438, 37.765, -122.396, 37.800), {label: 'Urban'})\n]);\n\n// Define an image collection time series to chart, MODIS vegetation indices\n// in this case.\nvar imgCol = ee.ImageCollection('MODIS/006/MOD13A1')\n .filter(ee.Filter.date('2015-01-01', '2020-01-01'))\n .select(['NDVI', 'EVI']);\n\n// Define the chart and print it to the console.\nvar chart = ui.Chart.image.seriesByRegion({\n imageCollection: imgCol,\n band: 'NDVI',\n regions: regions,\n reducer: ee.Reducer.mean(),\n scale: 500,\n seriesProperty: 'label',\n xProperty: 'system:time_start'\n})\n.setOptions({\n title: 'Average NDVI Value by Date',\n hAxis: {title: 'Date', titleTextStyle: {italic: false, bold: true}},\n vAxis: {\n title: 'NDVI (x1e4)',\n titleTextStyle: {italic: false, bold: true}\n },\n lineWidth: 5,\n colors: ['0f8755', '808080'],\n});\nprint(chart);\n```"]]
