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ee.Number.uint32
使用集合让一切井井有条
根据您的偏好保存内容并对其进行分类。
将输入值强制转换为无符号 32 位整数。
示例
代码编辑器 (JavaScript)
// Cast a number to unsigned 32-bit integer: [0, 4294967295].
var number = ee.Number(100);
print('Number:', number);
var uint32Number = number.uint32();
print('Number cast to uint32:', uint32Number);
/**
* Casting numbers to uint32 that are outside of its range and precision can
* modify the resulting value, note the behavior of the following scenarios.
*/
// A floating point number cast to uint32 loses decimal precision.
var float = ee.Number(1.7);
print('Floating point value:', float);
var floatToUint32 = float.uint32();
print('Floating point value cast to uint32:', floatToUint32);
// A number greater than uint32 range max cast to uint32 becomes uint32 range max.
var UINT32_MAX = 4294967295;
var outOfRangeHi = ee.Number(UINT32_MAX + 12345);
print('Greater than uint32 max:', outOfRangeHi);
var outOfRangeHiToUint32 = outOfRangeHi.uint32();
print('Greater than uint32 max cast to uint32 becomes uint32 max:', outOfRangeHiToUint32);
// A number greater than uint32 range min cast to uint32 becomes uint32 range min.
var UINT32_MIN = 0;
var outOfRangeLo = ee.Number(UINT32_MIN - 12345);
print('Less than uint32 min:', outOfRangeLo);
var outOfRangeLoToUint32 = outOfRangeLo.uint32();
print('Less than uint32 min cast to uint32 becomes uint32 min:', outOfRangeLoToUint32);
Python 设置
如需了解 Python API 和如何使用 geemap
进行交互式开发,请参阅
Python 环境页面。
import ee
import geemap.core as geemap
Colab (Python)
# Cast a number to unsigned 32-bit integer: [0, 4294967295].
number = ee.Number(100)
print('Number:', number.getInfo())
uint32_number = number.uint32()
print('Number cast to uint32:', uint32_number.getInfo())
"""Casting numbers to uint32 that are outside of its range and precision can
modify the resulting value, note the behavior of the following scenarios.
"""
# A floating point number cast to uint32 loses decimal precision.
float_number = ee.Number(1.7)
print('Floating point value:', float_number.getInfo())
float_to_uint32 = float_number.uint32()
print('Floating point value cast to uint32:', float_to_uint32.getInfo())
# A number greater than uint32 range max cast to uint32
# becomes uint32 range max.
UINT32_MAX = 4294967295
out_of_range_hi = ee.Number(UINT32_MAX + 12345)
print('Greater than uint32 max:', out_of_range_hi.getInfo())
out_of_range_hi_to_uint32 = out_of_range_hi.uint32()
print('Greater than uint32 max cast to uint32 becomes uint32 max:',
out_of_range_hi_to_uint32.getInfo())
# A number greater than uint32 range min cast to uint32
# becomes uint32 range min.
UINT32_MIN = 0
out_of_range_lo = ee.Number(UINT32_MIN - 12345)
print('Less than uint32 min:', out_of_range_lo.getInfo())
out_of_range_lo_to_uint32 = out_of_range_lo.uint32()
print('Less than uint32 min cast to uint32 becomes uint32 min:',
out_of_range_lo_to_uint32.getInfo())
如未另行说明,那么本页面中的内容已根据知识共享署名 4.0 许可获得了许可,并且代码示例已根据 Apache 2.0 许可获得了许可。有关详情,请参阅 Google 开发者网站政策。Java 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC):2025-07-26。
[null,null,["最后更新时间 (UTC):2025-07-26。"],[[["\u003cp\u003e\u003ccode\u003eNumber.uint32()\u003c/code\u003e casts a given Earth Engine Number to an unsigned 32-bit integer, effectively limiting its range to 0 to 4294967295.\u003c/p\u003e\n"],["\u003cp\u003eFloating point numbers cast with this method will lose their decimal precision, resulting in only the integer part being preserved.\u003c/p\u003e\n"],["\u003cp\u003eValues exceeding the maximum limit of uint32 will be set to the maximum value (4294967295), and values below the minimum limit will be set to 0.\u003c/p\u003e\n"],["\u003cp\u003eThis method is helpful when working with specific data types or when requiring predictable integer behavior within the defined uint32 range.\u003c/p\u003e\n"]]],[],null,["# ee.Number.uint32\n\nCasts the input value to an unsigned 32-bit integer.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|-------------------|---------|\n| Number.uint32`()` | Number |\n\n| Argument | Type | Details |\n|---------------|--------|------------------|\n| this: `input` | Number | The input value. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Cast a number to unsigned 32-bit integer: [0, 4294967295].\nvar number = ee.Number(100);\nprint('Number:', number);\n\nvar uint32Number = number.uint32();\nprint('Number cast to uint32:', uint32Number);\n\n\n/**\n * Casting numbers to uint32 that are outside of its range and precision can\n * modify the resulting value, note the behavior of the following scenarios.\n */\n\n// A floating point number cast to uint32 loses decimal precision.\nvar float = ee.Number(1.7);\nprint('Floating point value:', float);\n\nvar floatToUint32 = float.uint32();\nprint('Floating point value cast to uint32:', floatToUint32);\n\n// A number greater than uint32 range max cast to uint32 becomes uint32 range max.\nvar UINT32_MAX = 4294967295;\nvar outOfRangeHi = ee.Number(UINT32_MAX + 12345);\nprint('Greater than uint32 max:', outOfRangeHi);\n\nvar outOfRangeHiToUint32 = outOfRangeHi.uint32();\nprint('Greater than uint32 max cast to uint32 becomes uint32 max:', outOfRangeHiToUint32);\n\n// A number greater than uint32 range min cast to uint32 becomes uint32 range min.\nvar UINT32_MIN = 0;\nvar outOfRangeLo = ee.Number(UINT32_MIN - 12345);\nprint('Less than uint32 min:', outOfRangeLo);\n\nvar outOfRangeLoToUint32 = outOfRangeLo.uint32();\nprint('Less than uint32 min cast to uint32 becomes uint32 min:', outOfRangeLoToUint32);\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# Cast a number to unsigned 32-bit integer: [0, 4294967295].\nnumber = ee.Number(100)\nprint('Number:', number.getInfo())\n\nuint32_number = number.uint32()\nprint('Number cast to uint32:', uint32_number.getInfo())\n\n\n\"\"\"Casting numbers to uint32 that are outside of its range and precision can\nmodify the resulting value, note the behavior of the following scenarios.\n\"\"\"\n\n# A floating point number cast to uint32 loses decimal precision.\nfloat_number = ee.Number(1.7)\nprint('Floating point value:', float_number.getInfo())\n\nfloat_to_uint32 = float_number.uint32()\nprint('Floating point value cast to uint32:', float_to_uint32.getInfo())\n\n# A number greater than uint32 range max cast to uint32\n# becomes uint32 range max.\nUINT32_MAX = 4294967295\nout_of_range_hi = ee.Number(UINT32_MAX + 12345)\nprint('Greater than uint32 max:', out_of_range_hi.getInfo())\n\nout_of_range_hi_to_uint32 = out_of_range_hi.uint32()\nprint('Greater than uint32 max cast to uint32 becomes uint32 max:',\n out_of_range_hi_to_uint32.getInfo())\n\n# A number greater than uint32 range min cast to uint32\n# becomes uint32 range min.\nUINT32_MIN = 0\nout_of_range_lo = ee.Number(UINT32_MIN - 12345)\nprint('Less than uint32 min:', out_of_range_lo.getInfo())\n\nout_of_range_lo_to_uint32 = out_of_range_lo.uint32()\nprint('Less than uint32 min cast to uint32 becomes uint32 min:',\n out_of_range_lo_to_uint32.getInfo())\n```"]]