What were the major events of 2024? Find out in our timeline.

Hello to the one person reading this (that's you!), This is another devlog, which I haven't done in a long time, how time flies. My last devlog for this game was in mid-2024, we are now approaching th...

Anyone can help me to understand why GEE report this question？ Here is my code: var table = ee.FeatureCollection("projects/ee-qsz/assets/boreal_id1"); print('table', table); // 定义时间范围 var startYear = 2003; var endYear = 2011; var months = ee.List.sequence(1, 12); var years = ee.List.sequence(startYear, endYear); // 导入MODIS的EVI数据集 var collection = ee.ImageCollection('MODIS/MOD09GA_006_EVI') .filterDate('2003-01-01', '2011-12-31'); var clippedCollection = collection.map(function(image){ return image.clip(table); }); print('rawdata', clippedCollection); // 创建一个函数，用于计算每个月的均值 var monthlyMean = function(year, month) { var startDate = ee.Date.fromYMD(year, month, 1); var endDate = startDate.advance(1, 'month'); var monlyfirstImage = clippedCollection.filterDate(startDate, endDate).first(); var monthlyImages = clippedCollection.filterDate(startDate, endDate) .mean() .copyProperties(monlyfirstImage, ["system:time_start"]) .copyProperties(monlyfirstImage, ["system:time_end"]); /* .set('system:time_start', startDate.millis()) .set('system:time_end', endDate.millis()); */ return monthlyImages; }; // 按年月调用函数，创建月度EVI时间序列 var months = ee.List.sequence(1,12); print(months); var monthlyEvi = ee.ImageCollection.fromImages( ee.List.sequence(2003, 2011).map(function(year){ return months.map(function(month){ var evi = monthlyMean(year, month); // 设置时间属性为每个月的第一天 var startDate = ee.Date.fromYMD(year, month, 1); var evi2 = evi; return evi2.set('month', month); }); }).flatten() ); print('Monthly EVI', monthlyEvi); // 定义一个函数，将时间戳转换为可读日期格式 var formatTime = function(image) { var startTime = ee.Date(image.get('system:time_start')); var formattedTime_start = startTime.format('YYYY-MM-dd'); var image_month = image.date().get('month'); var endTime = ee.Date(image.get('system:time_end')); var formattedTime_end = endTime.format('YYYY-MM-dd'); var image1 = image.set('system:time_start', formattedTime_start); var image2 = image1.set('system:time_end', formattedTime_end); return image2; }; // 对每个图像应用 formatTime 函数 var formattedEvi = monthlyEvi.map(formatTime); print('Formatted Monthly EVI', formattedEvi); //可视化 var colorizedVis = { min: -1, max: 1, palette: [ 'ffffff', 'ce7e45', 'df923d', 'f1b555', 'fcd163', '99b718', '74a901', '66a000', '529400', '3e8601', '207401', '056201', '004c00', '023b01', '012e01', '011d01', '011301' ], }; Map.setCenter(-7.03125, 31.0529339857, 2); // Map.addLayer(formattedEvi, colorizedVis, 'Colorized'); // 计算系数d var d = ee.Number(2).multiply(Math.PI).divide(12); print('d',d); // 预先计算cos和sin项 var costerm = ee.List.sequence(0, 11).map(function(i){ return (d.multiply(i)).cos(); }); print('costerm',costerm); var sinterm = ee.List.sequence(0, 11).map(function(i){ return (d.multiply(i)).sin(); }); // 定义计算季节性指数 SI 的函数 var calculateSI = function(year) { var myDate = ee.Date.fromYMD(year, 1, 1); // 获取该年份的EVl数据 var eviYear = formattedEvi.filter(ee.Filter.calendarRange(year, year, 'year')); //print('Formatted yearly EVI',eviYear); // 计算季节性指数 SI var mx_col = []; var my_col = []; for (var i = 0; i < 12; i++) { var month = i+1; var eviMonth = eviYear.filter(ee.Filter.eq('month', month)).first(); var L = eviMonth.select('EVI'); var mx_i = L.multiply(ee.Number(costerm.get(i))) .copyProperties(eviMonth, ["system:time_start"]) .copyProperties(eviMonth, ["system:time_end"]); var my_i = L.multiply(ee.Number(sinterm.get(i))) .copyProperties(eviMonth, ["system:time_start"]) .copyProperties(eviMonth, ["system:time_end"]); mx_col.push(mx_i); my_col.push(my_i); } mx_col = ee.ImageCollection(mx_col); my_col = ee.ImageCollection(my_col); var mx = ee.Image(mx_col.mean().copyProperties(eviYear.first(), ["system:time_start"])); var my = ee.Image(my_col.mean().copyProperties(eviYear.first(), ["system:time_start"])); var si = mx.expression( 'sqrt(mx * mx + my * my)', {mx: mx, my: my} ); return si.rename(['SI']).copyProperties(eviYear.first(), ["system:time_start"]); //return mx; }; var test = ee.Image(calculateSI(2008)); print('test', test); //print('test2',test.select('SI')); //Map.addLayer(test.select('SI'), colorizedVis, 'test'); // 计算每年的季节性指数 SI var siCollection = ee.ImageCollection.fromImages(years.map(function(year) { return calculateSI(year); })); print('si', siCollection); var Vis = { min: -1.0, max: 1.0, }; Map.addLayer(siCollection,Vis, 'siCollection'); var exportArgs = Export.image.toDrive({ image: test, description: 'SI_2008', scale: 500, region: table.geometry().bounds(), fileFormat: 'GeoTIFF', fileNamePrefix: 'SI_2008' }); I have tryed to return mx,my and si. When I return mx and add it to map, there are no errors, but when I return my or si, GEE reported this error (in function calculateSI, line 97). Expected a homogeneous image collection, but an image with an incompatible band was encountered. Mismatched type for band 'EVI': Expected type: Float. Actual type: Float. Image ID: 1 This band might require an explicit cast.