Set Classification Type on GeoJSON Entities

Currently, there’s no way to set the classificationType on entities created from GeoJSONs. The reason you’d want this is if you’re using GeoJSONs to classify your 3D Tiles.

For example, this example uses the experimental 3D Tiles Vector format:

https://cesiumjs.org/Cesium/Build/Apps/Sandcastle/?src=3D Tiles Terrain Classification.html&label=All

But since no tools exist that can output this, you can’t actually do something like this in your own applications in CesiumJS. But you can totally do it if expose an option on GeoJSONDataSource to set the classification type.

[OmarShehata]

That’s fine then! That means there’s only one type to worry about (polygons). I think I saw some confusion on the forum about the difference between datasources and entities (the users weren’t aware that a datasource created entities) but it sounds like I can fix that by explaining in the doc/tutorials. That Sandcastle is definitely a good resource.

[Tonynovtop]

I tried,but it didn’t work @hpinkos, can you help me check it.the code is here: var tileset = new Cesium.Cesium3DTileset({ url: ‘…/…/…/data/20181102/tileset.json’, maximumScreenSpaceError: 2, maximumNumberOfLoadedTiles: 1000 }); viewer.scene.primitives.add(tileset); var buildingsPromise = Cesium.GeoJsonDataSource.load(‘…/…/…/data/test.json’); buildingsPromise.then(function (dataSource) { viewer.dataSources.add(dataSource); var buildings = dataSource.entities;

    var buildingsEntities = dataSource.entities.values;
    for (var i = 0;i < buildingsEntities.length;i++) {
        var entity = buildingsEntities[i];

        if(Cesium.defined(entity.polygon)) {
            entity.name = entity.properties.Id;
            entity.polygon.material = Cesium.Color.fromRandom({
                red : 0.2,
                minimumGreen : 0.5,
                maximumBlue : 0.5,
                alpha : 0.6
            });
            entity.polygon.outline = false;
            entity.polygon.classificationType = Cesium.ClassificationType.CESIUM_3D_TILE
        };
    }
});