ee.Number.toInt16

將輸入值轉換為帶正負號的 16 位元整數。

用量	傳回
Number.toInt16()	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 signed 16-bit integer: [-32768, 32767].
var number = ee.Number(100);
print('Number:', number);

var int16Number = number.toInt16();
print('Number cast to int16:', int16Number);


/**
 * Casting numbers to int16 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 int16 loses decimal precision.
var float = ee.Number(1.7);
print('Floating point value:', float);

var floatToInt16 = float.toInt16();
print('Floating point value cast to int16:', floatToInt16);

// A number greater than int16 range max cast to int16 becomes int16 range max.
var INT16_MAX = 32767;
var outOfRangeHi = ee.Number(INT16_MAX + 12345);
print('Greater than int16 max:', outOfRangeHi);

var outOfRangeHiToInt16 = outOfRangeHi.toInt16();
print('Greater than int16 max cast to int16 becomes int16 max:', outOfRangeHiToInt16);

// A number greater than int16 range min cast to int16 becomes int16 range min.
var INT16_MIN = -32768;
var outOfRangeLo = ee.Number(INT16_MIN - 12345);
print('Less than int16 min:', outOfRangeLo);

var outOfRangeLoToInt16 = outOfRangeLo.toInt16();
print('Less than int16 min cast to int16 becomes int16 min:', outOfRangeLoToInt16);

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 signed 16-bit integer: [-32768, 32767].
number = ee.Number(100)
print('Number:', number.getInfo())

int16_number = number.toInt16()
print('Number cast to int16:', int16_number.getInfo())


"""Casting numbers to int16 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 int16 loses decimal precision.
float_number = ee.Number(1.7)
print('Floating point value:', float_number.getInfo())

float_to_int16 = float_number.toInt16()
print('Floating point value cast to int16:', float_to_int16.getInfo())

# A number greater than int16 range max cast to int16 becomes int16 range max.
INT16_MAX = 32767
out_of_range_hi = ee.Number(INT16_MAX + 12345)
print('Greater than int16 max:', out_of_range_hi.getInfo())

out_of_range_hi_to_int16 = out_of_range_hi.toInt16()
print('Greater than int16 max cast to int16 becomes int16 max:',
      out_of_range_hi_to_int16.getInfo())

# A number greater than int16 range min cast to int16 becomes int16 range min.
INT16_MIN = -32768
out_of_range_lo = ee.Number(INT16_MIN - 12345)
print('Less than int16 min:', out_of_range_lo.getInfo())

out_of_range_lo_to_int16 = out_of_range_lo.toInt16()
print('Less than int16 min cast to int16 becomes int16 min:',
      out_of_range_lo_to_int16.getInfo())