我有一个通过 python 提取的 CZML 数据。我有建筑物,它们的几何形状、高度、建筑物 ID 和间隔。每个区间都有一个值。将 czml 数据加载到 Cesium 后,我想访问属性,然后根据给定的值自定义建筑物的颜色。这是我的 CZML 示例:
[{“id”:“文档”,“版本”:“1.0”},{“id”:32,“可用性”:“2014-01-01T00:00:00Z/2014-12-31T00:00:00Z ", "polygon": { "positions": { "cartographicDegrees": [54.7162360431897, 24.4519912715277, 0, 54.716219612921, 24.4519754832587, 0, 54.7162501395131, 24.4519488635358, 0, 54.7162465684811, 24.4519454316688, 0, 54.7162670831639, 24.4519275432238, 0, 54.7162707308589, 24.4519310439514 , 0, 54.7163022563025, 24.4519035537608, 0, 54.7161962974502, 24.4518018819532, 0, 54.7161647729823, 24.4518293730395, 0, 54.7162035538772, 24.4520196028966, 0, 54.7162360431897, 24.4519912715277, 0] }, "someProperty": [{ "interval": "2014-00- 01T00:00:00Z/2014-01-01T00:00:00Z", "En_C_need": 0.7 }, { "interval": "2014-01-01T00:00:00Z/2014-02-01T00:00:00Z", " En_C_need": 1.0 }, { "interval": "2014-02-01T00:00:00Z/2014-03-01T00:00:00Z", "En_C_need": 2.6 }, { "interval": "2014-03- 01T00:00:00Z/2014-04-01T00:00:00Z", "En_C_need": 12.1 }, { "interval": "2014-04-01T00:00:00Z/2014-05-01T00:00:00Z" , "En_C_need": 30.2 }, { "间隔": "2014-05-01T00:00:00Z/2014-06-01T00:00:00Z", "En_C_need": 37.8 }], "挤压高度“:6.0 } }]
我有其他自定义的 GeoJSON 数据,我尝试了相同的方法,但没有奏效。
这是我正在尝试做的(这不起作用):
var test2 = Cesium.CzmlDataSource.load ('Data/czml/TESTING/example_8.czml');
test2.then(function (dataSource) {
viewer.dataSources.add(test2);
viewer.zoomTo (test2);
var entities = dataSource.entities.values;
var colorHash = {};
var Energy = [];
for (var i = 0; i < entities.length; i++) {
var entity = entities[i];
Energy = entity.someProperty.En_C_need;
var color = colorHash [Energy];
if(!color ) {
if (Energy < 5 ) {
color = Cesium.Color.DARKSALMON.withAlpha (0.95);
} else if (Energy < 10) {
color = Cesium.Color.BURLYWOOD.withAlpha (0.95);
} else if (Energy < 20) {
color = Cesium.Color.RED.withAlpha (0.95);
} else {
color = Cesium.Color.PINK.withAlpha (0.95);
};
colorHash[Energy] = color;
};
entity.polygon.fill = true;
entity.polygon.material = color;
entity.polygon.outline = false;
};
});