ee.Number.toUint16

Truyền giá trị đầu vào thành số nguyên 16 bit không dấu.

Cách sử dụng	Giá trị trả về
Number.toUint16()	Số

Đối số	Loại	Thông tin chi tiết
this: input	Số	Giá trị đầu vào.

Ví dụ

Trình soạn thảo mã (JavaScript)

// Cast a number to unsigned 16-bit integer: [0, 65535].
var number = ee.Number(100);
print('Number:', number);

var uint16Number = number.toUint16();
print('Number cast to uint16:', uint16Number);


/**
 * Casting numbers to uint16 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 uint16 loses decimal precision.
var float = ee.Number(1.7);
print('Floating point value:', float);

var floatToUint16 = float.toUint16();
print('Floating point value cast to uint16:', floatToUint16);

// A number greater than uint16 range max cast to uint16 becomes uint16 range max.
var UINT16_MAX = 65535;
var outOfRangeHi = ee.Number(UINT16_MAX + 12345);
print('Greater than uint16 max:', outOfRangeHi);

var outOfRangeHiToUint16 = outOfRangeHi.toUint16();
print('Greater than uint16 max cast to uint16 becomes uint16 max:', outOfRangeHiToUint16);

// A number greater than uint16 range min cast to uint16 becomes uint16 range min.
var UINT16_MIN = 0;
var outOfRangeLo = ee.Number(UINT16_MIN - 12345);
print('Less than uint16 min:', outOfRangeLo);

var outOfRangeLoToUint16 = outOfRangeLo.toUint16();
print('Less than uint16 min cast to uint16 becomes uint16 min:', outOfRangeLoToUint16);

Thiết lập Python

Hãy xem trang Môi trường Python để biết thông tin về API Python và cách sử dụng geemap cho quá trình phát triển tương tác.

import ee
import geemap.core as geemap

Colab (Python)

# Cast a number to unsigned 16-bit integer: [0, 65535].
number = ee.Number(100)
print('Number:', number.getInfo())

uint16_number = number.toUint16()
print('Number cast to uint16:', uint16_number.getInfo())


"""Casting numbers to uint16 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 uint16 loses decimal precision.
float_number = ee.Number(1.7)
print('Floating point value:', float_number.getInfo())

float_to_uint16 = float_number.toUint16()
print('Floating point value cast to uint16:', float_to_uint16.getInfo())

# A number greater than uint16 range max cast to uint16
# becomes uint16 range max.
UINT16_MAX = 65535
out_of_range_hi = ee.Number(UINT16_MAX + 12345)
print('Greater than uint16 max:', out_of_range_hi.getInfo())

out_of_range_hi_to_uint16 = out_of_range_hi.toUint16()
print('Greater than uint16 max cast to uint16 becomes uint16 max:',
      out_of_range_hi_to_uint16.getInfo())

# A number greater than uint16 range min cast to uint16
# becomes uint16 range min.
UINT16_MIN = 0
out_of_range_lo = ee.Number(UINT16_MIN - 12345)
print('Less than uint16 min:', out_of_range_lo.getInfo())

out_of_range_lo_to_uint16 = out_of_range_lo.toUint16()
print('Less than uint16 min cast to uint16 becomes uint16 min:',
      out_of_range_lo_to_uint16.getInfo())