| Mountain resources are an important resource for a city.A good mountain landscape plays an important role in improving the city's image and enhancing the " face score " of the city.In recent years,the national level has attached great importance to the construction of urban ecological civilization.However,In recent decades,high-rise buildings have been rising and being built,and many urban mountain landscapes have been blocked.At the same time,due to the lack of a scientific method for identifying mountain viewing points,some mountain viewing points have been occupied by urban construction,and potential mountain viewing corridors have been blocked,mountain view is difficult to enter the city.As an excellent tourist city in China and a famous national historical and cultural city,Qingzhou has many mountains,especially surrounded by famous mountains in the piedmont area adjacent to the ancient city.How to do a good job of "showing mountains" in urban construction is a subject of great practical significance.This research took the national 5A scenic spot-the ancient city area where the Qingzhou ancient city is located as the research object,adopted the theoretical review-method summary-technology optimization-practical application research ideas,and studied the construction of the mountain view corridor in the ancient city area in six parts.The first part expounded the background,purpose and significance of this research,and pointed out that the research on the construction of the mountain-viewing gallery in the ancient city of Qingzhou has important practical significance and practical necessity.And introduced the main research methods and technical routes used.The second part expounded the constituent elements of the mountain-viewing gallery,related visual analysis principles,and GIS sight analysis methods.Then,taking the line-of-sight corridor research as an entry point,the research reviewed on the line-of-sight corridor research in relevant research at home and abroad,such as special studies,urban landscape features,building height control,and urban design.Combined with relevant case studies,the main methods and technical methods of the existing sight corridor construction and control were summarized.It was pointed out that in the face of multiple mountain attractions,GIS technology and multi-factor evaluation methods should be combined to optimize the technical process.Mountain landscapes are evaluated in a more scientific manner,and the viewpoints of mountain views are accurately identified in both directions.The third part explained the constituent elements of the mountain viewing gallery and related visual analysis principles and GIS sight analysis methods.Combined with existing research and expert inquiry,the research selected the the evaluation factors that influence the evaluation of the appreciation of the mountain landscape and the identification of the viewpoints.The expert scoring method and the analytic hierarchy process were used to determine the weight of each factor.A multi-factor evaluation system for mountain scenic spot evaluation and mountain viewpoint recognition evaluation was constructed.The existing reverse visual domain analysis method was optimized to form a two-way mountain view point of "primary selection of reverse visual domain analysis + optimization of forward multi-factor evaluation,combination of GIS sight analysis and multi-factor evaluation analysis" recognition method,and the research constructed the "viewpoint classification evaluation-two-way identification of viewpoints-optimized selection of viewing gallery azimuth angle" technology process of mountain viewing gallery construction.The fourth part used the technical system for mountain view gallery to conduct an empirical study on the Qingzhou ancient city area.The research extracted the data of elevation points on the CAD topographic map of Qingzhou City,the current status and the building contour lines and layer information of the planned buildings,collected the road network data of the central urban area,and established the urban area of Qingzhou City and the west mountainous area by using Arc GIS,Arc Scene,Auto CAD Based on the TIN model with polyhedral buildings,the ground surface model with building grids,and the traffic network analysis model of the central city,on this basis,the multi-factor evaluation of the ornamental value of the surrounding mountains of the ancient city area was carried out.The Arc GIS visual domain analysis function and The multi-factor analysis method carried out reverse primary selection and positive optimization of the mountain viewpoints in the ancient city area,and finally determined 8 mountain viewpoints.Then it used Arc Scene to analyze the skyline of 8mountain-viewing viewpoints respectively,generated the skyline polyline,and filtered the best azimuth angle to construct 8 mountain-viewing corridors.The fifth part discussed the control problems of the eight view corridors built in the mountains based on the control angle of the building height-limiting zone.According to the viewing level of the mountain view,the relative height reduction operation of different standards was performed on the polylines of the skyline of the 8 mountain view points,and the height limit surface of the mountain view gallery was generated.Then,the Arc GIS grid calculator was used to subtract the height-limiting surface of the building from the ground surface of the grid to obtain the height-controlling grid of the building in the line-of-sight corridor interface,and the height-limiting correction was carried out in conjunction with the relevant planning.On this basis,the height control interface of the mountain viewing gallery was defined and the control strategy was proposed.The sixth part Summarized the full research,the shortcomings of this research and the need to continue to deepen and improved the research direction in the future. |
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