CN116050876A - An Analytical Method for the Evaluation and Distribution of the Potential Supply and Distribution of Ecosystem Cultural Services - Google Patents

Abstract

The invention discloses an analysis method for potential supply evaluation and distribution of an ecological system cultural service, which comprises the following steps: step one: obtaining photos with geographic marks from a social media platform, and screening to generate a photo data set; step two: inputting the processed 13 environmental factor data into an Arcgis unified coordinate system and range, and converting the processed 13 environmental factor data into an asc format; and thirdly, inputting a photo data set and an environmental factor library into Maxent software, setting 5000 times of operation, 25% as training, 75% as testing, repeating 10 times, and repeating other parameters as defaults, wherein the average value of AUC values is more than 0.9, so that the accuracy of a prediction result of a MaxEnt model is high, and the potential supply distribution condition of the cultural service of the urban ecological system can be accurately estimated. The weights of 13 environmental factors are evaluated through a knife-cut test chart, and environmental factors with large contribution degree are further analyzed by combining a response curve; fourthly, the Arcgis is used for dividing the cultural service supply capacity of the urban ecological system into three grades of strong, medium and weak by adopting a natural breakpoint mode.

Description

An Analytical Method for the Evaluation and Distribution of the Potential Supply and Distribution of Ecosystem Cultural Services

technical field

The invention belongs to the technical field of ecological system cultural service evaluation, and in particular relates to a method for evaluating potential supply of ecological system cultural service based on social media photos.

Background technique

Ecosystem cultural services (CES) are non-material benefits that people obtain from ecosystems through spiritual enrichment, cognitive development, reflection, entertainment, and aesthetic experience, including aesthetic, cultural, spiritual, and religious, and cultural services are incorporated into Ecosystem service assessment plays an important role in comprehensively measuring the contribution of ecosystems to human well-being. The Millennium Ecosystem Assessment (Millennium Ecosystem Assessment) defines ecosystem cultural services as "the intangible benefits that humans obtain from ecosystems through spiritual satisfaction, cognitive development, reflection, entertainment, and aesthetic experience." The impact of ecosystems on human well-being can be effectively assessed. The research on ecosystem cultural services has sparked a new upsurge in academia, and a large number of related articles and research reports have been published. Among them, the research topics of most of the publications are related to ecosystem services, and the rest are distributed in biodiversity and climate change. The prior art discloses a heritage source identification method, system and medium based on ecosystem cultural services, wherein the method includes: acquiring cultural heritage resources in the research area; acquiring key ecosystem cultural services in the research area, and determining the value of cultural services Indexes to build an evaluation system; obtain the tourism resource value and cultural service value level of cultural heritage resources according to the correlation matrix, and obtain the candidate selection set A of the source of heritage; generate various cultural data based on the cultural service value data that integrates public preference data and spatial distribution data Serve the value map to obtain the candidate set B of the heritage source; obtain the final spatial distribution map of the heritage source in the research area according to the candidate set A of the heritage source and the candidate set B of the heritage source. The invention provides an objectively scientific, clear-cut, universally applicable and easy-to-replicate heritage source identification method, which can be widely used in the technical field of cultural industries. However, ecosystem cultural services involve spiritual, cognitive, and aesthetic aspects, and have intangible characteristics. The research on related spatial assessment methods has made slow progress. The commonly used methods are participatory cartography, participatory geographic information system, and SolVES (Social Values for Ecological Services) model. etc., are often based on social surveys, which are time-consuming and costly.

Contents of the invention

In recent years, with the advent of the era of big data, the sources of data for CES evaluation have become more extensive and are developing in the direction of large-scale and high-resolution. However, there are few existing techniques for analyzing the potential supply evaluation and distribution of systemic cultural services. . The present invention obtains photo points with geographic location information from social media platforms, combines 13 environmental factors, and uses Maxent to predict the potential spatial distribution of cultural service supply in urban ecosystems. Environmental photos can reflect people's perception of the CES provided by the ecosystem. The photos with geographical location coordinates obtained from social media data provide a new possibility for rapid quantitative evaluation of ecosystem cultural services. The supply of ecosystem cultural services The situation is spatially positioned, and based on this, the CES supply "hot spots" in the region can be obtained, and then provide guidance for the management of ecosystem cultural services in the region.

In order to achieve the above purpose, the present invention provides an analysis method for evaluating and distributing the potential supply of ecological system cultural services, which includes the following steps:

(1) Obtain and process social media photos;

(2) Construct a library of environmental factors and analyze the environmental factors that affect the potential supply of ecosystem cultural services;

(3) Map the potential supply distribution of ecosystem cultural services, and complete the evaluation and distribution analysis of the potential supply of ecosystem cultural services.

In the present invention, social media photos come from social media platforms that can publicly obtain photos with geotagged photos, including but not limited to Two Step Road Outdoor Platform, Six Foot Outdoor Platform, Flickr, etc. The potential supply area of ecosystem cultural services is not particularly limited, and it can be a county or a city. The method of obtaining social media photos is conventional technology, such as crawling by writing crawler code in conventional Python or crawling by using existing crawler software, such as locomotive collectors, Houyi collectors, octopus collectors, etc.; processing social media photos refers to screening For photos related to ecosystem cultural services, remove photos that are not related to ecosystem cultural services, and then input them into Arcgis, use the spatial autocorrelation tool to exclude spatial autocorrelation photo points, and output the optimized photo dataset in csv format. Preferably, the number of landscape photos to be screened is 100-1000, such as 200-500. Geotagging refers to photos with GPS latitude and longitude information, also known as photos with geographic coordinates. Photos related to ecosystem cultural services refer to photos showing natural and cultural landscapes of ecosystems, photos showing tangible (buildings, cultural landscapes, species related to local culture) or intangible cultural heritage (traditional customs, folklore) , Photos of recreational activities (climbing, hiking), corresponding to the aesthetics, culture, and entertainment of ecosystem culture.

In the present invention, environmental factors include elevation, land use type, population density, luminous index, distance to scenic spots, distance to historical and cultural relics, distance to religious places, distance to leisure and entertainment places, distance to rivers and lakes , distance to the road, vegetation coverage index, landscape diversity index, and habitat quality; input the above environmental factor data into the Arcgis unified coordinate system, and use the administrative division to cut into the same boundary, and convert it into an asc file The output is an environmental factor library for easy recognition by Maxent software. The acquisition of environmental factors is a conventional technique, in which elevation, land use type, population density, and luminous index come from remote sensing images and statistical yearbooks; distances to scenic spots, distances to historical and cultural relics, distances to religious sites, distances to leisure and entertainment The distance to the site, the distance to rivers and lakes, and the distance to roads are calculated by using the Euclidean distance in Arcgis; the vegetation coverage index is calculated by ENVI; the landscape diversity index is calculated by Fragstats; the habitat quality is calculated by Invest .

In the present invention, the analysis of environmental factors affecting the potential supply of ecological system cultural services is specifically, using the knife-cut method of Maxent software to evaluate the weight of environmental factors, and combining the response curve to analyze the impact of environmental factors on urban ecological system cultural services; preferably, To avoid overfitting, take factors ≥ 1%, and remove factors whose correlation coefficient is |r| ≥ 0.8; Maxent model parameters are set to 5000 operations, 25% as training factors, 75% as testing factors, repeated 10 times, and others Parameters are default.

In the present invention, drawing the distribution status of the potential supply of the cultural service of the ecological system is specifically, using Maxent to generate the distribution map of the potential supply of the cultural service of the urban ecological system, and then inputting it into Arcgis to divide the supply capacity of the cultural service of the urban ecological system into strong, medium , Weak three grades.

The invention discloses an analysis system for potential supply evaluation and distribution of ecological system cultural services, including:

(1) Image acquisition module, used to acquire and process social media photos;

(2) Environmental factor processing module, which is used to construct the environmental factor library and analyze the environmental factors that affect the potential supply of ecosystem cultural services;

(3) Mapping module, which is used to map the distribution of potential supply of ecosystem cultural services, and complete the evaluation and distribution analysis of potential supply of ecosystem cultural services.

The present invention discloses a storage medium, which stores a program executable by a processor, and the program is used for executing the analysis method for evaluating and distributing potential supply of ecological system cultural services. Further, the present invention discloses an electronic device, including a processor, a memory, an input device, and an output device, and the memory stores a program for executing the above analysis method for evaluating and distributing the potential supply of ecosystem cultural services.

The invention first acquires and processes social media photos, then constructs an environmental factor library and analyzes the environmental factors affecting the potential supply of cultural services in the urban ecosystem, and finally draws the distribution of the potential supply of cultural services in the urban ecosystem; under the method of the invention, Maxent runs 10 times The average value of the AUC value is greater than 0.9, indicating that the analysis results of the present invention have high precision and can accurately evaluate the potential supply distribution of urban ecosystem cultural services.

As a model for predicting the potential distribution area of species, Maxent can predict the distribution of species based on only existing data. However, the current research using Maxent is mostly aimed at species protection, predicting the potential spatial distribution of species in the future, and further improving species protection and The priority of habitat restoration provides guidance, and the existing technology has not been applied to the analysis of the distribution of cultural services in ecosystems. The invention provides a method for evaluating the potential supply of ecological system cultural services based on social media photos, which can quickly determine the environmental factors that affect the potential supply capacity of urban ecological system cultural services, and evaluate the urban ecological system according to the distribution of potential supply of urban ecological system cultural services. Classification of the system's cultural service supply capabilities.

The present invention provides for the first time a method for evaluating the potential supply of ecological system cultural services based on social media photos, which has the following beneficial effects:

A photo dataset for evaluation is generated by acquiring geotagged photos from social media platforms, filtering and de-correlating them. Obtain data such as elevation, land use type, population density, and night lights from remote sensing images and statistical yearbooks, and use the Euclidean distance in Arcgis to calculate the distance to scenic spots, historical and cultural relics, religious places, leisure and entertainment places, rivers, lakes, and roads Distance; vegetation coverage index calculated by ENVI; landscape diversity index calculated by Fragstats; habitat quality calculated by Invest, and 13 environmental factors were input into Arcgis for processing to generate an environmental factor library for evaluation. Input the photo data set and environmental factor library into the MaxEnt model, analyze the factors with large contribution by the knife-cut method, and analyze the impact of the factors with large contribution on the potential supply of urban ecosystem cultural services combined with the response curve, and predict the cultural services of urban ecosystem The distribution of potential supply, through Arcgis, divides the supply capacity of urban ecosystem cultural services into three levels: strong, medium, and weak, providing important guidance for the optimization of urban ecosystem cultural services.

Description of drawings

Fig. 1 is a flow chart of the method of the present invention.

FIG. 2 is a point distribution diagram of geographically marked photos according to Embodiment 1 of the present invention.

Fig. 3 is the 10 simulation ROC curve diagrams of the supply evaluation method of the embodiment of the present invention.

Fig. 4 is a Jackknife test diagram of a latent distribution environment variable of a supply evaluation method according to Embodiment 1 of the present invention.

FIG. 5 is a response curve diagram of environmental factors with a large contribution to the supply evaluation method according to Embodiment 1 of the present invention.

Fig. 6 is a distribution map of the potential supply of ecological system cultural services in the research area of the first supply evaluation method of the present invention.

Fig. 7 is a level diagram of supply capacity of ecological system cultural services in the research area of the first supply evaluation method of the present invention.

Fig. 8 is a 10-time simulated ROC curve diagram of the supply evaluation method in Example 2 of the present invention.

Fig. 9 is a distribution map of the potential supply of ecological system cultural services in the research area of the supply evaluation method in the second embodiment of the present invention.

Fig. 10 is a 10-time simulated ROC curve diagram of the third supply evaluation method of the present invention.

Fig. 11 is a distribution map of the potential supply of ecological system cultural services in the research area of the third supply evaluation method of the present invention.

Detailed ways

The present invention will be further described below in conjunction with specific embodiments and accompanying drawings, so as to help understand the content of the present invention.

The invention provides a method for evaluating the potential supply of ecological system cultural services based on social media photos, which can quickly determine the environmental factors that affect the potential supply capacity of urban ecological system cultural services, and evaluate the urban ecological system according to the distribution of potential supply of urban ecological system cultural services. Classification of the system's cultural service supply capabilities. Figure 1 is a schematic flow diagram of the method of the present invention. The present invention first obtains and processes social media photos, then constructs an environmental factor library and analyzes the environmental factors that affect the potential supply of cultural services in the urban ecosystem, and finally draws the distribution of the potential supply of cultural services in the urban ecosystem Under the method of the present invention, the average value of the AUC value of Maxent running 10 times is greater than 0.9, indicating that the analysis result of the present invention has high precision and can accurately evaluate the potential supply distribution of urban ecosystem cultural services. The inventiveness of the present invention is that it discloses a method for evaluating the potential supply of ecosystem cultural services based on social media photos for the first time. The specific data acquisition and processing involved in this method are conventional technologies, which can be realized by existing software, such as through conventional existing crawlers The software Houyi Collector crawls photos, etc. from the open platform.

Embodiment one

Step 1: Acquisition and processing of social media photos. From July 2021 to July 2022, Suzhou hiking itinerary was retrieved from the six feet outdoor platform, and 104,207 photos with geotagging were obtained. Random sampling was performed on the photos, and a sample with a data volume of 5,000 was obtained. To ensure the accuracy of the results nature, filter out photos related to ecosystem cultural services, and manually remove photos that are not related to CES: including photos with people as the subject, such as selfies; objects, signs, display boards, etc. that have nothing to do with landscapes; Poor photos; photos taken with special purposes, such as river water quality surveys, safety equipment inspections, road markings, etc.; and each user retains no more than 2 photos. In the end, 279 usable photo data were obtained. Input 279 photos into Arcgis and use the spatial autocorrelation tool to exclude the photo points of spatial autocorrelation, keep 72 photos after optimization, the distribution is shown in Figure 2, and output the optimized photo dataset in csv format.

Step 2: Build the environmental factor library. See Table 1. Obtain elevation, land use type, population density, and night light data from Suzhou remote sensing images and statistical yearbooks; use Arcgis Calculated from the Euclidean distance; the vegetation coverage index is calculated by ENVI; the landscape diversity index is calculated by Fragstats; the habitat quality is calculated by Invest; the data that can be directly obtained in the table are all downloaded from the given website. For the administrative boundaries of Suzhou City: download the GDEMV3 30M resolution digital elevation data for the elevation, download the 2020 data for the land use type, download the 2020 county-level population census spatial distribution data for the population density, and download the 2021 annual data for the night light data of China; The environmental factor data to be calculated should be downloaded from the given website first, and then calculated by the software given on the right side of the table. Input the above data into the unified coordinate system of Arcgis, cut into the same boundary by administrative division, and convert it into asc format for easy recognition by Maxent software, so as to build an environmental factor library for the potential supply evaluation of Suzhou's ecosystem cultural services.

Step 3: Analyze the environmental factors that affect the potential supply of cultural services in urban ecosystems. Import the photo data set csv format and the environmental factor library asc format into Maxent at the same time, and use the knife-cut method of Maxent software to evaluate the weight of 13 environmental factors. In order to avoid overfitting, take factors ≥ 1%, and remove the correlation coefficient is |r Factors ≥ 0.8; Maxent model parameters set 5000 operations, 25% as training factors, 75% as testing factors, repeat 10 times, other parameters are default; AUC value is 0.914 (Figure 3), greater than 0.9, indicating MaxEnt model The prediction results have high precision and can accurately assess the potential supply distribution of Suzhou's ecosystem cultural services.

The analysis results in Figure 4 are further obtained by the knife-cut method to determine the contribution rate and weight of each environmental factor to the potential supply distribution of Suzhou's ecosystem cultural services, and then analyze the main environmental factors that affect the potential supply distribution of Suzhou's ecosystem cultural services.

The factor contribution rate of each factor is specifically: the distance to scenic spots, the distance to historical and cultural relics, the elevation, and the distance to religious sites have the greatest impact on the prediction of the potential supply distribution of ecosystem cultural services, with a contribution rate of >80.0%. See Table 2.

Combined with the response curve to analyze the impact of the factors with large contribution on the cultural services of the Suzhou ecosystem, it mainly includes four types of factors: distance to scenic spots, distance to historical and cultural relics, elevation, and distance to religious sites, as shown in Figure 5 Show.

Step 4: Map the distribution of potential supply of cultural services in urban ecosystems. The distribution map of the potential supply of urban ecosystem cultural services generated by Maxent is shown in Figure 6, which is input into Arcgis to divide the supply capacity of urban ecosystem cultural services into strong, medium, and weak levels by means of natural breakpoints, as shown in Figure 7.

Embodiment two

Step 1: It is the csv format file in Step 1 of Embodiment 1.

Step 2: Replace the habitat quality in Step 2 of Example 1 with slope (obtained directly from globeland30.org), keep the other factors unchanged, and obtain the asc format.

Step 3: Import the photo data set csv format and the environmental factor library asc format into Maxent at the same time, and use the knife-cut method of Maxent software to evaluate the weight of 13 environmental factors. To avoid overfitting, take factors ≥ 1% and remove the correlation coefficient is a factor of |r|≥0.8; Maxent model parameters are set to 5000 operations, 25% as training factors, 75% as test factors, repeated 10 times, and other parameters are default; AUC value is 0.902 (Figure 8); Maxent generated The distribution map of the potential supply of cultural services in the urban ecosystem is shown in Figure 9.

Embodiment three

Step 1: It is the csv format file in Step 1 of Embodiment 1.

Step 2: Add the slope on the basis of the environmental factors in Step 2 of Example 1, and keep the other factors unchanged. There are 14 factors in total, and the asc format is obtained.

Step 3: Import the photo data set csv format and the environmental factor library asc format into Maxent at the same time, and use the knife-cut method of Maxent software to evaluate the weight of 13 environmental factors. To avoid overfitting, take factors ≥ 1% and remove the correlation coefficient It is a factor of |r|≥0.8; Maxent model parameters are set to 5000 operations, 25% as a training factor, 75% as a test factor, repeated 10 times, and other parameters are default; AUC value is 0.890 (Figure 10), less than 0.9; The potential supply distribution map of urban ecosystem cultural services generated by Maxent is shown in Figure 11.

This invention uses social media photos as the main data, uses Maxent to predict the potential spatial distribution of CES supply at the urban scale of Suzhou, provides certain guidance for the development of tourism resources and heritage protection in Suzhou in the future, and at the same time provides landscape planners with information that affects the ecosystem culture The environmental factors of the potential supply of services are conducive to the planning and decision-making departments to propose corresponding comprehensive planning and management strategies.

In this paper, specific examples are used to illustrate the inventive concept in detail, and the descriptions of the above embodiments are only used to help understand the core idea of the present invention. It should be pointed out that for those skilled in the art, any obvious modification, equivalent replacement or other improvement should be included in the protection scope of the present invention without departing from the inventive concept.

Claims (10)

1. An analysis method for potential supply evaluation and distribution of an ecological system cultural service comprises the following steps: (1) obtaining and processing social media photos; (2) Constructing an environmental factor library and analyzing environmental factors affecting potential supply of the cultural services of the ecological system; (3) And drawing the distribution condition of the potential supply of the cultural services of the ecological system, and completing the evaluation and the analysis of the distribution of the potential supply of the cultural services of the ecological system.

2. The method for analyzing potential provisioning evaluations and distribution of ecosystem cultural services according to claim 1, wherein the social media photos originate from a social media platform capable of publicly obtaining photos with geographic markers; processing social media photos refers to screening photos related to the cultural services of the ecosystem, inputting Arcgis, removing photo points of spatial autocorrelation by using a spatial autocorrelation tool, and outputting an optimized photo data set into a csv format.

3. The method of claim 1, wherein the environmental factors include one or more of elevation, land use type, population density, night light index, distance to scenic spot, distance to historic cultural relics, distance to religious venues, distance to recreational places, distance to rivers and lakes, distance to roads, vegetation cover index, landscape diversity index, and habitat quality; and inputting the environmental factor data into an Arcgis unified coordinate system, cutting into the same boundary by using administrative division, and converting the same into an asc file for outputting to be an environmental factor library.

4. The method for analyzing the potential supply evaluation and distribution of the cultural services of the ecosystem according to claim 1, wherein the analysis of the environmental factors affecting the potential supply of the cultural services of the ecosystem is specifically to evaluate the weight of the environmental factors by using a knife-cut method of Maxent software and analyze the influence of the environmental factors on the cultural services of the ecosystem in combination with a response curve.

5. The analysis method for potential supply evaluation and distribution of cultural services of an ecosystem according to claim 4, wherein a factor of not less than 1% is taken, and the removal correlation coefficient is a factor of not less than |r| 0.8; the Maxent model parameters were set 5000 times, 25% as training factors, 75% as test factors, and repeated 10 times.

6. The method for analyzing the evaluation and distribution of the potential supply of the cultural services of the ecosystem according to claim 1, wherein the step of drawing the distribution of the potential supply of the cultural services of the ecosystem is to generate a distribution map of the potential supply of the cultural services of the ecosystem by using Maxent, and then input Arcgis to rank the capability of supplying the cultural services of the ecosystem by using a natural breakpoint method.

7. The contribution degree of environmental factors to the influence of the potential provision of the ecological system cultural services, the potential provision distribution map of the ecological system cultural services and the level of the capability of providing the ecological system cultural services, which are obtained by the analysis method of the potential provision evaluation and distribution of the ecological system cultural services according to claim 1.

8. An analysis system for potential provisioning evaluation and distribution of ecosystem cultural services, comprising:

(1) The picture acquisition module is used for acquiring and processing social media pictures;

(2) The environmental factor processing module is used for constructing an environmental factor library and analyzing environmental factors affecting the potential supply of the cultural services of the ecological system;

(3) And the drawing module is used for drawing the distribution condition of the potential supply of the cultural services of the ecological system and completing the evaluation and the analysis of the distribution of the potential supply of the cultural services of the ecological system.

9. A storage medium storing a program executable by a processor, wherein the program is for performing the method for analyzing potential provisioning evaluations and distribution of ecosystem cultural services according to claim 1.

10. An electronic device comprising a processor, a memory, an inputter, and an outputter, wherein the memory stores a program for executing the analysis method for potential supply evaluation and distribution of ecosystem cultural services according to claim 1.

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