/**
* @File    :   TPDC/GLOBAL_GPP
* @Time    :   2021/05/20
* @Author  :   piesat
* @Version :   1.0
* @Contact :   400-890-0662
* @License :   (C)Copyright 航天宏图信息技术股份有限公司
* @Desc    :   加载全球长时间序列高分辨的生态系统总初级生产力数据集
*/

//加载中国边界
var roi = pie.FeatureCollection("RESDC/WORLD_COUNTRY_BOUNDARY")
            .filter(pie.Filter.eq("name", "CHINA"))
            .first()
            .geometry();
//加载中国高分辨的生态系统总初级生产力数据
var img = pie.ImageCollection('TPDC/GLOBAL_GPP')
            .filterDate("2014-12-01", "2015-01-01")
            .first()
            .select("gpp")
            .clip(roi);
print(img);
//设定预览参数
visParams = {min: 0, max: 15655, palette: ['ffd611', 'fff705', 'd6e21f', 'b5e22e', '3ae237', '86e26f']};
//加载显示影像
Map.centerObject(roi, 2);
Map.addLayer(img, visParams, "GPP");
//图例
var data = {title: "GPP（gC/m^2d）",
            colors: ['#ffd611', '#fff705', '#d6e21f', '#b5e22e', '#3ae237', '#86e26f'],
            labels: ["0", "5000", "10000", "15000"],
            step: 30};
var style = {left: "60%", top: "70%", height: "70px", width: "350px"};
var legend = ui.Legend(data, style);
Map.addUI(legend);