//第一步:划定研究区域福州市varchina=pie.FeatureCollection("NGCC/CHINA_CITY_BOUNDARY");// print(china);varFZ=china.filter(pie.Filter.eq("name","福州市"));Map.addLayer(FZ,{color:"ffff00ff",fillColor:"00000000"},"福州市");Map.centerObject(FZ,8);vargeometry=FZ.getAt(0).geometry();/...