In this paper, first we are going to discuss briefly the importance of 3D information, and its application because of the Increasing demand for detailed information about real world objects and phenomena including alt...In this paper, first we are going to discuss briefly the importance of 3D information, and its application because of the Increasing demand for detailed information about real world objects and phenomena including altimetry and planimetry data (X, Y, Z), then we will explain in short the available methods for 3D measurement. It’s important to note that the Information collection by itself cannot define and sufficiently provide all the necessary actions to be taken in order to get them accessible and useful for users. The data management and establishment of a proper and reliable DBMS and finally a GIS system at the same time are vital crucial in the course of 3D application that will be discussed throughout the paper. The existing drawbacks and elements needed to be considered for the cartographic presentation are the key issues in three-dimensional world visualization. The elaboration on the 3D information and its knowledge transfer to the users in a SDI framework as well as the requirement recognition of beneficiary organizations will be the next step in this paper and the most probable problems will be studied in this stage. At the final stage, we’ll come up with conclusion, warnings and recommendation.展开更多
探索将万维网地理信息系统(Web Geographic Information System,WebGIS)技术引入数字无线电广播发射覆盖分析领域,重点研究数据处理、平台搭建、模型构建及可视化分析等关键技术环节,并探讨覆盖优化调整的策略与方法。通过构建高精度数...探索将万维网地理信息系统(Web Geographic Information System,WebGIS)技术引入数字无线电广播发射覆盖分析领域,重点研究数据处理、平台搭建、模型构建及可视化分析等关键技术环节,并探讨覆盖优化调整的策略与方法。通过构建高精度数据集、搭建高效WebGIS平台、改进传播模型、开发可视化分析工具等手段,力图为无线电广播网络的精细化规划和智能化管理提供新的思路和方法。展开更多
文摘In this paper, first we are going to discuss briefly the importance of 3D information, and its application because of the Increasing demand for detailed information about real world objects and phenomena including altimetry and planimetry data (X, Y, Z), then we will explain in short the available methods for 3D measurement. It’s important to note that the Information collection by itself cannot define and sufficiently provide all the necessary actions to be taken in order to get them accessible and useful for users. The data management and establishment of a proper and reliable DBMS and finally a GIS system at the same time are vital crucial in the course of 3D application that will be discussed throughout the paper. The existing drawbacks and elements needed to be considered for the cartographic presentation are the key issues in three-dimensional world visualization. The elaboration on the 3D information and its knowledge transfer to the users in a SDI framework as well as the requirement recognition of beneficiary organizations will be the next step in this paper and the most probable problems will be studied in this stage. At the final stage, we’ll come up with conclusion, warnings and recommendation.
文摘探索将万维网地理信息系统(Web Geographic Information System,WebGIS)技术引入数字无线电广播发射覆盖分析领域,重点研究数据处理、平台搭建、模型构建及可视化分析等关键技术环节,并探讨覆盖优化调整的策略与方法。通过构建高精度数据集、搭建高效WebGIS平台、改进传播模型、开发可视化分析工具等手段,力图为无线电广播网络的精细化规划和智能化管理提供新的思路和方法。
