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CN-122023717-A - Historical building group visual integrity quantitative measurement method

CN122023717ACN 122023717 ACN122023717 ACN 122023717ACN-122023717-A

Abstract

The invention discloses a method for quantitatively measuring visual integrity of a historical building group, which comprises the following steps of firstly extracting space form basic information in a research area to construct a map data file, determining value grades of building monomers in the historical building group, then arranging Shi Jianzhu visual integrity observation points in an observation area according to sampling intervals, then obtaining visual integrity detection data of the historical building group at each observation point by adopting a space analysis technology, and finally analyzing and processing the detection data to obtain a quantitatively measuring result of the visual integrity of the historical building group in the area and visualizing the quantitatively measuring result. The invention solves the problems of manual dependence, low measuring and calculating precision, large error, low repeatability, limited application scene and the like of the existing method, and provides solid data support and scientific basis for heritage protection decision making.

Inventors

  • JIN XIN

Assignees

  • 东南大学

Dates

Publication Date
20260512
Application Date
20260126

Claims (5)

  1. 1. A method for quantitatively measuring visual integrity of a historical building group, the method comprising the steps of: step 1, extracting space form basic information in a research area to construct a map data file, and determining the value grade of each building monomer in a historical building group; Step 2, arranging historical building group visual integrity observation points in an observation area according to sampling intervals; Step 3, obtaining historical building group visual integrity detection data at each observation point by adopting a space analysis technology; And 4, analyzing and processing the detection data to obtain and visualize the visual integrity quantitative measurement result of the historical building group in the area.
  2. 2. The method for quantifying measurement of visual integrity of a historic building group according to claim 1, wherein said step 1 comprises the steps of: Step 1.1, collecting urban basic geographic information data in a research area according to open source data information, arranging the range of an observation area, historical building groups and layer data of urban buildings, importing geographic information system software, setting a unified coordinate system, and constructing an urban digital model; 1.2,3D, converting the urban building and historical building group data layer, and generating an urban building height Cheng Shange data layer according to building height information; And 1.3, evaluating the heritage value and the social value of each building monomer in the historical building group in the research area, and dividing the building monomers in the historical building group into three grades, thereby generating a historical building space distribution map layer of each grade.
  3. 3. A method for quantifying the measure of visual integrity of a historical building complex according to claim 1, wherein said step 2 comprises the steps of: step 2.1, acquiring a two-dimensional point element set based on grids by adopting CREATE FISHNET tools in a set area according to observation point intervals, and enabling the two-dimensional point element set to be tangent with a layer of an observation area so as to respectively acquire two-dimensional observation point elements in the observation area; And 2.2, according To the set observation point height data, carrying out element three-dimensional processing on the two-dimensional observation point elements through a Feature To 3D By Attribute tool To obtain a three-dimensional observation point set OP { P i (lon i ,lat i, ,h i ) positioned in an observation area, wherein i epsilon C is used for simulating the history building group observation points with normal observation height in the observation area, lon i ,、lat i represents the coordinate value of the ith observation point, h i is the height, C is the number of the observation points, i represents the number of the observation points, OP is the three-dimensional observation point set, and P i is the ith observation point.
  4. 4. A method for quantifying the measure of visual integrity of a historical building complex according to claim 1, wherein said step3 comprises the steps of: step 3.1, performing visibility analysis on an ith observation point P i in the three-dimensional observation point set OP, taking urban building height Cheng Shange DEM data as input, obtaining visible grid data of the point, and converting the visible grid data into visible area surface element data of the observation point through a grid surface turning tool; Step 3.2, the surface element data of the visual area of the i observation point P i obtained in the step is spatially connected with a first-level historical building data layer, and a first-level historical building and a visual part thereof which are visible at the i observation point P i are obtained through a selecting and intersecting tool; Step 3.3, importing the urban building high Cheng Shange DEM data, obtaining the visible area of the first-level historical building visible at the ith observation point P i through a surface information extraction tool, and outputting the visual integrity detection data of the ith observation point P i on the first-level historical building group, wherein the file name is < observation point number > _the historical building grade > _table; Step 3.4, repeating the steps 3.2 and 3.3 for the ith observation point P i , and performing space analysis and data extraction with the second-level and third-level historical building data layers respectively to obtain visual integrity detection data of the observation point on the second-level and third-level historical building groups; And 3.5, further, repeating the step 3.1,3.2,3.3,3.4 for each observation point element in the three-dimensional observation point set OP to obtain a result of detecting the visual integrity of the historical building group in the research area by all the observation points in the three-dimensional observation point set OP, wherein the detection process can be automatically operated and processed by each tool construction analysis module in the geographic information system software.
  5. 5. A method for quantifying the measure of visual integrity of a historical building complex according to claim 1, wherein said step 4 comprises the steps of: Step 4.1, merging the historical building group visual integrity detection data generated in the statistics step 3 to obtain a data file containing historical building visibility VDF i m based on number statistics and historical building visibility VDA i m based on area statistics of each observation point on different levels of historical building monomers, and historical building group visual integrity measurement Ind i at the point, wherein i represents the number of the observation point, m represents the level of a resource point, and m=1, 2 and 3; Step 4.2, the number statistics-based historical building visibility degree VDF i m =F i m /N m of each observation point to different historical building monomers in step 4.1 represents the ratio of the visible number F i m of the historical building monomers in the m level at the ith observation point to the number N m of all the historical building monomers in the level; Step 4.3, step 4.1, wherein each observation point is a historical building visibility VDA i m =A i m / S m based on area statistics of different levels of historical building monomers, the ratio of the sum of the visible areas A i m of the historical building monomers of the level m to the total area S m of all the historical building monomers of the level at the i-th observation point is represented, step 4.4, step 4.1, the historical building group visual integrity measure Ind i of the observation point is represented as a weighted value of the historical building visibility based on number statistics and the historical building visibility based on area statistics of each level of historical building at the observation point, and the weighted value is obtained by the following formula ; Wherein i represents an observation point number, m represents a resource point level, w m is a weight value of an m-level historical building and w 1 +w 2 +w 3 =1, wf and wa are weight values of a historical building visibility based on number statistics and a historical building visibility based on area statistics and wf+wa=1 respectively; And 4.5, according to the data statistics file, combining the position information of the observation points, adopting a Kriging space interpolation method to display visual effect on the quantized measurement data of the visual integrity of the historical building group in the area.

Description

Historical building group visual integrity quantitative measurement method Technical Field The invention relates to the technical field of heritage protection, in particular to a quantitative measurement method for visual integrity of a historical building group. Background Visual integrity has been repeatedly emphasized in several international resolution and technical documents as a central issue of world heritage protection since the twenty-first century. The visual integrity of the historical building group is a key index for measuring the heritage protection condition and the cultural value display, and directly influences the public to recognize the prominent common value of the historical building group. However, existing quantitative measurement methods still have significant limitations, and are difficult to adapt to complex environments of large-scale, multivalent levels of historical building groups. The existing quantitative measure research of the visual integrity of heritage mainly relies on methods such as close-range photogrammetry, three-dimensional laser scanning technology, observer interviews and eye movement experiments, computer simulation and the like. The complexity of the visual integrity quantification measure of the historical building group is greatly increased due to the fact that the historical building group has the characteristics of huge number of building monomers, obvious cultural relic protection value level difference and random interleaving of spatial distribution of building monomers with different value levels. Specifically, close-range photogrammetry and three-dimensional laser scanning technologies rely on a large number of manual operations to complete data acquisition, so that even arrangement of observation points is difficult, standardized management and control of shooting parameters are also impossible, and the technical method lacks universality and repeatability. Observer interview and eye movement experiments are limited by multiple factors such as individual cognitive difference of observers, experiment cost investment, equipment configuration conditions, tissue implementation difficulty and the like, and measurement accuracy is difficult to meet high-accuracy research requirements. The existing computer simulation method is mainly used for carrying out visual field analysis on single or few building monomers through three-dimensional modeling, and cannot be directly applied to a large-scale historical building group scene consisting of hundreds to thousands of historical buildings. In addition, the method is usually only used for carrying out analysis on a single or few selected key observation points, cannot adapt to multi-type observation point scenes, has limited measurement accuracy, and is difficult to apply to large-scale complex urban space environments where historical building groups are located. Therefore, the invention discloses a method for quantitatively measuring the visual integrity of a historical building group, which is an urgent need in the field of heritage protection practice. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a method for quantitatively measuring the visual integrity of a historical building group, which is based on a three-dimensional space morphological model in a research area and historical building monomer space position information with different price levels, obtains the visual integrity detection data of the historical building group at each observation point by laying high-precision observation points and combining a space analysis technology, further generates a quantized measurement result of the visual integrity of the historical building group in the research area, and provides solid data support and scientific basis for heritage protection decision making. The invention provides a method for quantitatively measuring visual integrity of a historical building group, which specifically comprises the following steps: step 1, extracting space form basic information in a research area to construct a map data file, and determining the value grade of each building monomer in a historical building group; Step 2, arranging historical building group visual integrity observation points in an observation area according to sampling intervals; Step 3, obtaining historical building group visual integrity detection data at each observation point by adopting a space analysis technology; And 4, analyzing and processing the detection data to obtain and visualize the visual integrity quantitative measurement result of the historical building group in the area. The step 1 comprises the following steps: Step 1.1, collecting urban basic geographic information data in a research area according to open source data information, arranging the range of an observation area, historical building groups and layer data of urban buildings, importing geographic information system software, setting a uni