[0040] Example 1
[0041] Such as figure 1 As shown, this embodiment provides a skyline evaluation method based on city real scene scrolls and three-dimensional model projection, including the following steps:
[0042] S1, based on the long scroll of real city scenes, construct the current city skyline by region, level, and category;
[0043] Specifically, it includes the following steps:
[0044] S11, construct the current city area;
[0045] The current urban areas mainly include waterfront areas, mountain areas, urban landmark areas, etc., forming vector results;
[0046] S12, construct the current level of the city;
[0047] For the waterfront area and mountain area, the hierarchical division of near water, middle and far water is carried out to form vector results;
[0048] S13, construct categories related to the current city skyline;
[0049] The categories related to the city skyline include: (1) Architecture, including building height, building volume, building top shape, building texture and color; (2) Building group relationships, including building height divisions, building shape combinations, and landmark buildings; (3) Landscape features, including mountains, vegetation and greening; (4) Structures and others, including bridges, towers, large sculptures or amusement facilities, sky, etc.; based on the above four categories of urban skyline composition classification, forming corresponding Vector results
[0050] S14, according to the vector results of sub-region, sub-level and sub-category, divide the real-life long scroll area of the facade, including the sky and water surface, and form sub-layers that can be dynamically turned on and off;
[0051] Specifically, the long scroll of the facade refers to the use of photography and image processing technology to generate super-long real-life images of several kilometers or tens of kilometers, using special software for browsing, and superimposing rich information. For example: it can show several kilometers of city facade or city skyline along the river. For the production process of ultra-long high-definition real-scene scrolls, please refer to the invention patent application with the publication number CN109544455A for "a seamless fusion method for ultra-long HD real-scene scrolls", which will not be repeated here.
[0052] S15, construct a sub-regional current city skyline based on the vector results of the sub-regions and the long scroll of the actual facade; sub-region refers to the construction of the current city skyline according to different areas such as waterfront area, mountain area and city landmark area;
[0053] S16, build a hierarchical city skyline based on the hierarchical vector results and the real-life facade scroll; hierarchical refers to the different levels of the waterfront area including near water, middle and far water, and mountain areas near, middle and The different levels of the vision construct the skyline of the current city respectively;
[0054] S17: Construct a sub-category of the current city skyline based on the vector results of the sub-categories and the long scroll of the actual facade; sub-category refers to the construction of the current city skyline according to different categories such as buildings, building group relationships, landscape features, and structures;
[0055] Based on the long scroll of city real scenes, construct the current city skyline of sub-region, sub-level and sub-category. The skyline supports the superposition and independent control of sub-region, sub-level, and sub-category skylines; the skyline constructed in this way Lines are more hierarchical and more convenient for analysis and planning. For example, if the building blocks the mountain, the skyline of the current building and the skyline of the mountain will obviously cross.
[0056] S18, to realize the superposition and independent control of the sub-regional, sub-level and sub-category skylines.
[0057] S2: Carry out three-dimensional modeling of the architectural plan, and perform elevation projection of the architectural plan according to the observation point;
[0058] Specifically, it includes the following steps:
[0059] S21: Carry out three-dimensional modeling of different architectural schemes of the same construction project;
[0060] The three-dimensional modeling of the architectural plan includes the geometric structure and texture of the building, as well as the auxiliary vegetation, etc.; the existing three-dimensional modeling method is used to model the geometric structure and texture of the building, and the auxiliary vegetation.
[0061] S22, bind information such as building height, building density, and building volume to the three-dimensional building plan;
[0062] S23: Perform elevation projection on different architectural schemes according to the observation point;
[0063] Since the long scroll of the facade has a linear coordinate system, the parallel facade projection of the architectural plan is carried out from the corresponding observation point. Different from perspective projection, parallel projection always maintains the original size of the three-dimensional model of the architectural plan, can solve the problem of near-large and far-small, and supports superimposition on the long scroll of urban facades.
[0064] S24, to achieve superposition and independent control between projections of different architectural schemes.
[0065] S3, based on a long scroll of real city scenes, superimposed on the current skyline of the city and the elevation projection of the architectural plan, and evaluate the architectural plan.
[0066] Specifically, it includes the following steps:
[0067] S31, under the same linear coordinate system of the facade, superimpose the current city skyline and the real long scroll of the city facade to realize the integration of the current city skyline and the real long scroll of the city facade;
[0068] S32, under the same linear coordinate system of the facade, superimpose the projections of the different architectural schemes of the same project and the real long scroll of the urban facade to realize the integration of the architectural plan and the real long scroll of the existing facade;
[0069] S33: Evaluate the influence of building height, building density, building volume, facade color, and building roof form on the skyline in different building plans;
[0070] The skylines of different cities have different characteristics. Through the preliminary investigation and research of the city skylines, we can understand the constituent elements and characteristics of the city skylines, the height, volume, color, and relevant plot areas of the buildings, and the main observation points The location is mainly concerned with the phenomenon; the relevant planning and design documents and regulations of each city's skyline are collected as the basic data for the evaluation of the skyline.
[0071] In the evaluation process, combined with the location, volume, facade color, roof shape, and bound building height, building density, building volume and other information embodied in the projection of the three-dimensional architectural plan, comprehensive skyline evaluation is performed.
[0072] S34: Evaluate the impact of the spatial relationship between the building, the mountain and the water surface in different architectural schemes on the skyline;
[0073] Spatial relationship can be applied to intuitive skyline evaluation, so that some of the skyline-related planning and design documents and laws and regulations that have a strong traditional meaning can be calculated. For example, the overall outline of the building corresponds to the ups and downs of the mountain, and 20% of the top part of the mountain is guaranteed not to be blocked; it can be quantified as a morphological control line that fluctuates with the mountain, and 20% of the top part has a height control line, prohibiting building height exceeding the limit, etc. .
[0074] In the evaluation process, combined with the spatial relationship between the mountain and the water surface displayed by the projection of the three-dimensional architectural plan, through superposition and calculation, comprehensively evaluate the skyline.
[0075] S35, based on the skyline evaluation result, provide a skyline evaluation report.
[0076] Through the skyline evaluation method based on urban real-life scrolls and three-dimensional model projections described in this embodiment, when evaluating the impact of different architectural schemes on the skyline of the same project, the overall appearance of the city after the construction of the building can be The influence of style is evaluated. The given skyline evaluation report can provide an intuitive basis for planning scheme evaluation.
[0077] Through the skyline evaluation method based on the urban real scene scroll and the projection of the three-dimensional model described in this embodiment, there is no need to produce massive high-precision three-dimensional models, three-dimensional terrain and landform data of the current situation of the city, and the requirements for software and hardware are not high. Strong performance, low production cost, short production cycle; and because of the use of the real scene image as the background, the authenticity is strong; and the vector results of different regions, different levels, and different categories are formed separately, making the skyline more hierarchical and more convenient Analysis and planning.
