基于Cesium的三维智慧城市系统，兼容超图SuperMap的三维服务

/** * Modifications copyright (C) 2016 <SuperMap Software Co., Ltd.> * Cesium - https://github.com/AnalyticalGraphicsInc/cesium * * Copyright 2011-2016 Cesium Contributors * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * Columbus View (Pat. 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