ee.Number.uint32

將輸入值轉換為無正負號的 32 位元整數。

用量傳回
Number.uint32()數字
引數類型詳細資料
這個：input數字輸入值。

範例

程式碼編輯器 (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 設定

請參閱 Python 環境頁面，瞭解 Python API 和如何使用 geemap 進行互動式開發。

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())