Pengumuman: Semua project nonkomersial yang terdaftar untuk menggunakan Earth Engine sebelum
15 April 2025 harus
memverifikasi kelayakan nonkomersial untuk mempertahankan akses Earth Engine.
ee.Image.gt
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Menampilkan 1 jika dan hanya jika nilai pertama lebih besar daripada nilai kedua untuk setiap pasangan band yang cocok di image1 dan image2. Jika image1 atau image2 hanya memiliki 1 band, maka image tersebut akan digunakan untuk semua band di gambar lainnya. Jika gambar memiliki jumlah band yang sama, tetapi bukan nama yang sama, gambar tersebut digunakan berpasangan dalam urutan alami. Band output diberi nama untuk input yang lebih panjang dari kedua input, atau jika panjangnya sama, dalam urutan image1. Jenis piksel output adalah boolean.
| Penggunaan | Hasil |
|---|
Image.gt(image2) | Gambar |
| Argumen | Jenis | Detail |
|---|
ini: image1 | Gambar | Gambar yang digunakan untuk mengambil band operand kiri. |
image2 | Gambar | Gambar yang digunakan untuk mengambil band operand kanan. |
Contoh
Code Editor (JavaScript)
// Show world oceans in blue and anything higher than the ellipsoid as gray.
// The bedrock layer is generally close to the geoid (sealevel).
var elevation = ee.Image('NOAA/NGDC/ETOPO1').select('bedrock');
var waterLand = elevation.gt(0.0);
var waterLandViz = {palette: ['cadetblue', 'lightgray']};
Map.addLayer(waterLand, waterLandViz, 'water_land');
Penyiapan Python
Lihat halaman
Lingkungan Python untuk mengetahui informasi tentang Python API dan penggunaan
geemap untuk pengembangan interaktif.
import ee
import geemap.core as geemap
Colab (Python)
# Show world oceans in blue and anything higher than the ellipsoid as gray.
# The bedrock layer is generally close to the geoid (sealevel).
elevation = ee.Image('NOAA/NGDC/ETOPO1').select('bedrock')
water_land = elevation.gt(0.0)
water_land_viz = {'palette': ['cadetblue', 'lightgray']}
m = geemap.Map()
m.add_layer(water_land, water_land_viz, 'water_land')
m
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 2025-07-26 UTC.
[null,null,["Terakhir diperbarui pada 2025-07-26 UTC."],[[["\u003cp\u003eThe \u003ccode\u003egt()\u003c/code\u003e function compares corresponding bands of two images, returning 1 if the first image's band value is greater than the second image's band value, and 0 otherwise.\u003c/p\u003e\n"],["\u003cp\u003eIf the images have different numbers of bands, single-band images are compared against all bands of the multi-band image; if they have the same number of bands but different names, bands are compared in their natural order.\u003c/p\u003e\n"],["\u003cp\u003eThe output is a boolean image with bands named according to the longer input image or, if equal in length, the first image's band names.\u003c/p\u003e\n"],["\u003cp\u003eThis function is useful for creating binary masks based on thresholding, such as identifying areas above sea level in an elevation dataset.\u003c/p\u003e\n"]]],["The function compares corresponding bands between two images (`image1` and `image2`). It returns 1 (true) if `image1`'s band value is greater than `image2`'s; otherwise, it returns 0 (false). If one image has a single band, it's compared against all bands of the other image. If the images have the same amount of bands with differing names, bands are compared sequentially. The output, representing these comparisons, is an image with boolean pixel values, named according to the longer input image's band names, or `image1`'s if they have the same length.\n"],null,["# ee.Image.gt\n\nReturns 1 if and only if the first value is greater than the second for each matched pair of bands in image1 and image2. If either image1 or image2 has only 1 band, then it is used against all the bands in the other image. If the images have the same number of bands, but not the same names, they're used pairwise in the natural order. The output bands are named for the longer of the two inputs, or if they're equal in length, in image1's order. The type of the output pixels is boolean.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|--------------------|---------|\n| Image.gt`(image2)` | Image |\n\n| Argument | Type | Details |\n|----------------|-------|---------------------------------------------------------|\n| this: `image1` | Image | The image from which the left operand bands are taken. |\n| `image2` | Image | The image from which the right operand bands are taken. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Show world oceans in blue and anything higher than the ellipsoid as gray.\n// The bedrock layer is generally close to the geoid (sealevel).\nvar elevation = ee.Image('NOAA/NGDC/ETOPO1').select('bedrock');\nvar waterLand = elevation.gt(0.0);\nvar waterLandViz = {palette: ['cadetblue', 'lightgray']};\nMap.addLayer(waterLand, waterLandViz, 'water_land');\n```\nPython setup\n\nSee the [Python Environment](/earth-engine/guides/python_install) page for information on the Python API and using\n`geemap` for interactive development. \n\n```python\nimport ee\nimport geemap.core as geemap\n```\n\n### Colab (Python)\n\n```python\n# Show world oceans in blue and anything higher than the ellipsoid as gray.\n# The bedrock layer is generally close to the geoid (sealevel).\nelevation = ee.Image('NOAA/NGDC/ETOPO1').select('bedrock')\nwater_land = elevation.gt(0.0)\nwater_land_viz = {'palette': ['cadetblue', 'lightgray']}\nm = geemap.Map()\nm.add_layer(water_land, water_land_viz, 'water_land')\nm\n```"]]
