公告:所有在
2025 年 4 月 15 日之前注册使用 Earth Engine 的非商业项目都必须
验证是否符合非商业性质的资格条件,才能继续使用 Earth Engine。
ee.Number.toInt64
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。
将输入值转换为有符号 64 位整数。
示例
代码编辑器 (JavaScript)
// Cast a number to signed 64-bit integer: [-9223372036854776000, 9223372036854776000].
var number = ee.Number(100);
print('Number:', number);
var int64Number = number.toInt64();
print('Number cast to int64:', int64Number);
/**
* Casting numbers to int64 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 int64 loses decimal precision.
var float = ee.Number(1.7);
print('Floating point value:', float);
var floatToInt64 = float.toInt64();
print('Floating point value cast to int64:', floatToInt64);
// A number greater than int64 range max cast to int64 becomes int64 range max.
var INT64_MAX = 9223372036854776000;
var outOfRangeHi = ee.Number(INT64_MAX + 12345);
print('Greater than int64 max:', outOfRangeHi);
var outOfRangeHiToInt64 = outOfRangeHi.toInt64();
print('Greater than int64 max cast to int64 becomes int64 max:', outOfRangeHiToInt64);
// A number greater than int64 range min cast to int64 becomes int64 range min.
var INT64_MIN = -9223372036854776000;
var outOfRangeLo = ee.Number(INT64_MIN - 12345);
print('Less than int64 min:', outOfRangeLo);
var outOfRangeLoToInt64 = outOfRangeLo.toInt64();
print('Less than int64 min cast to int64 becomes int64 min:', outOfRangeLoToInt64);
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 signed 64-bit integer:
# [-9223372036854775808, 9223372036854775808].
number = ee.Number(100)
print('Number:', number.getInfo())
int64_number = number.toInt64()
print('Number cast to int64:', int64_number.getInfo())
"""Casting numbers to int64 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 int64 loses decimal precision.
float_number = ee.Number(1.7)
print('Floating point value:', float_number.getInfo())
float_to_int64 = float_number.toInt64()
print('Floating point value cast to int64:', float_to_int64.getInfo())
# A number greater than int64 range max becomes int64 range max.
# Python int is too large to be mapped to int64, use float instead.
INT64_MAX = 9223372036854775808.0
out_of_range_hi = ee.Number(INT64_MAX + 12345)
print('Greater than int64 max:', '{:.0f}'.format(out_of_range_hi.getInfo()))
out_of_range_hi_to_int64 = out_of_range_hi.toInt64()
print('Greater than int64 max cast to int64 becomes int64 max:',
'{:.0f}'.format(out_of_range_hi_to_int64.getInfo()))
# A number greater than int64 range min becomes int64 range min.
# Python int is too large to be mapped to int64, use float instead.
INT64_MIN = -9223372036854775808.0
out_of_range_lo = ee.Number(INT64_MIN - 12345)
print('Less than int64 min:', '{:.0f}'.format(out_of_range_lo.getInfo()))
out_of_range_lo_to_int64 = out_of_range_lo.toInt64()
print('Less than int64 min cast to int64 becomes int64 min:',
'{:.0f}'.format(out_of_range_lo_to_int64.getInfo()))
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最后更新时间 (UTC):2025-07-26。
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