varcalculateClassAreaByYear=features.map(function(feature){ vardw2=years.map(function(year){ vardw1=ee.ImageCollection('GOOGLE/DYNAMICWORLD/V1') .filterDate(ee.Date.fromYMD(year,1,1),ee.Date.fromYMD(year,12,31)).filter(ee.Filter.bounds(feature.geometry())).select('label').reduce(ee.Red...
returnee.FeatureCollection(dw2)})print(calculateClassAreaByYear.flatten()) 我们这里可以看到提示期待的类型不对,需求的类型是几何图形,但是这里给的确实矢量,所以我们需要再后面加一个.geometry() 修改后的代码: 代码语言:javascript 复制 varyears=ee.List.sequence(2021,2022)varcalculateClassAreaByYear=features.ma...
When you write a script in Earth Engine (either JavaScript or Python), that code does NOT run directly on Earth Engine servers at Google. Instead, theclient libraryencodes the script into a set ofJSONobjects, sends the objects to Google and waits for a response. Each object represents a s...
Returns: String 想获取什么信息就可以了,用area,perimeter,type,coordinates等等就OK,而且利用toGeoJSONString()进行地理坐标和平面坐标的转化 代码语言:javascript 复制 print('Polygon printout: ',polygon);// 计算面积用到area()然后除以1000000求平方千米print('Polygon area: ',polygon.area().divide(1000*1000...
return ee.FeatureCollection(dw2)})print(calculateClassAreaByYear.flatten()) 我们这里可以看到提示期待的类型不对,需求的类型是几何图形,但是这里给的确实矢量,所以我们需要再后面加一个.geometry() 修改后的代码: var years = ee.List.sequence(2021,2022)var calculateClassAreaByYear = features.map(function(...
大家都知道,在Google Earth Engine上做分类,多数是随机森林等逐像素分类模型。性能很好,但是对于上下文信息则利用较少,而且训练的时候并不能非常好的利用样本数据,因此在上面使用深度学习模型就成为了需要完成的重要步骤。 GEE学习室的老师们最近使用GEE训练了深度学习模型用于不透水面分类,可以直接应用于不同年份和不同...
Calculate Distance Area and Perimeter in a Map Accuracy map Accuracy Comment References Back to top Content | Map | Measure on Map Measure on google map: latitude longitude coordinates DD DMS, address and location, distance (km, meters, mile, foot), area, poliline, circle, perimeter. Back...
The focal window size used to calculate urban_proportion urban_proportion The percentage proportion of land area within a focal area surrounding each shot that is urban land cover. rh0 Relative height metrics at 0% ...
vartableName='JRC/GWIS/GlobFire/v2/DailyPerimeters/2020';varcomputeArea=function(f){returnf.set({'area':f.area()});}// 将一个选定的表作为一个特征集合导入。varfeatures=ee.FeatureCollection(tableName).map(computeArea);// 线性火灾面积梯度的可视化参数。varvisParams={palette:['f5ff64','b5...
solar_azimuthSolar azimuthsolar_elevationSolar elevationsurface_flagIndicates elev_lowestmode is within 300 m of DEM or MSSurban_focal_window_sizeThe focal window size used to calculate urban_proportionurban_proportionThe percentage proportion of land area within a focal area surrounding each shot that...