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Google Earth Engine——统计逐年土地分类的频率
2022-07-25 09:56:00 【此星光明】
本文需要的函数:
ee.Reducer.mode(maxBuckets, minBucketWidth, maxRaw)
创建一个将计算输入的模式的还原器。对于小数量的输入(最多到maxRaw),模式将被直接计算;对于大数量的输入,模式将从直方图中得到。
参数。
maxBuckets(整数,默认为空)。
建立直方图时要使用的最大桶数;将四舍五入到2的幂。
minBucketWidth (Float, default: null):
直方图桶的最小宽度,如果为空,则允许2的任何次方。
maxRaw(整数,默认为空)。
在建立初始直方图之前,需要积累的数值数量。
返回。缩减器
ee.Reducer.frequencyHistogram()
Returns a Reducer that returns a (weighted) frequency table of its inputs.
No arguments.
Returns: Reducer
代码:
// 设置研究区域
var s = ee.FeatureCollection("users/bqt2000204051/beijing");
var geometry = s.geometry() ;
var exptTab = [];
//for 循环进行分析遍历每一年的影像数据并统计
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