请问这段代码使用joinItem为什么渲染不出来专题图，也没有报错
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title data-i18n="resources.title_themeRange"></title>
<script type="text/javascript" src="../js/include-web.js"></script>
</head>
<body style=" margin: 0;overflow: hidden;background: #fff;width: 100%;height:100%;position: absolute;top: 0;">
<div id="map" style="margin:0 auto;width: 100%;height: 100%"></div>
<script type="text/javascript" src="../../dist/leaflet/include-leaflet.js"></script>
<script type="text/javascript">
var host = window.isLocal ? window.server : "https://iserver.supermap.io";
var map, themeService, themeRange, themeParameters, themeLayer,
url = host + "/iserver/services/map-china400/rest/maps/China";
// 外部表数据（Province_Statistics）
var Province_Statistics = [
{ Province_Name: "河南省", GDP: 400000000000 },
{ Province_Name: "四川省", GDP: 300000000000 },
{ Province_Name: "山东省", GDP: 100000000000 },
// 添加更多省份数据...
];
map = L.map('map', {
center: [30, 84],
maxZoom: 18,
zoom: 3
});
new L.supermap.TiledMapLayer(url, {noWrap: true, transparent: true}).addTo(map);
createTheme();
function createTheme() {
themeService = new L.supermap.ThemeService(url);
// 定义 JoinItem
var joinItem = new L.supermap.JoinItem({
foreignTableName: "Province_Statistics", // 外部属性数据表名
joinFilter: "China_Province_pg.Name = Province_Statistics.Province_Name", // 关联条件
joinType: "INNERJOIN" // 关联类型
});
// 定义范围分段专题图的项
var themeRangeItem1 = new L.supermap.ThemeRangeItem({
start: 0,
end: 500000000000,
style: new L.supermap.ServerStyle({
fillForeColor: new L.supermap.ServerColor(211, 255, 250),
lineColor: new L.supermap.ServerColor(179, 209, 193),
lineWidth: 0.1
})
});
var themeRangeItem2 = new L.supermap.ThemeRangeItem({
start: 500000000000,
end: 1000000000000,
style: new L.supermap.ServerStyle({
fillForeColor: new L.supermap.ServerColor(178, 218, 199),
lineColor: new L.supermap.ServerColor(179, 209, 193),
lineWidth: 0.1
})
});
var themeRangeItem3 = new L.supermap.ThemeRangeItem({
start: 1000000000000,
end: 3000000000000,
style: new L.supermap.ServerStyle({
fillForeColor: new L.supermap.ServerColor(58, 178, 166),
lineColor: new L.supermap.ServerColor(179, 209, 193),
lineWidth: 0.1
})
});
// 定义范围分段专题图
themeRange = new L.supermap.ThemeRange({
rangeExpression: "Province_Statistics.GDP", // 使用关联表中的 GDP 字段
rangeMode: L.supermap.RangeMode.EQUALINTERVAL,
items: [themeRangeItem1, themeRangeItem2, themeRangeItem3]
});
// 定义专题图参数
themeParameters = new L.supermap.ThemeParameters({
datasetNames: ["China_Province_pg"], // 空间数据集
dataSourceNames: ["China"], // 数据源名称
joinItems: [joinItem], // 加入 JoinItem
themes: [themeRange] // 加入专题图
});
// 获取专题图信息并添加到地图
themeService.getThemeInfo(themeParameters).then(function (serviceResult) {
var result = serviceResult.result;
if (result && result.newResourceID) {
themeLayer = new L.supermap.TiledMapLayer(url, {
noWrap: true,
cacheEnabled: false,
transparent: true,
layersID: result.newResourceID
}).addTo(map);
}
});
}
</script>
</body>
</html>
