An assessment method for the degradation of map data quality caused by land use planning adjustment

Abstract

The present invention discloses a method for evaluating the degradation of map data quality caused by land use planning adjustment. By obtaining the comparison of data before and after in the planned area, resetting the measurement coordinates according to the overlapping boundary lines, re-obtaining the field surveying and mapping data, dividing the planned area according to the usage function of the area, regional measurement can be achieved. After measuring each functional area, secondary surveying and mapping of the functional area are realized through remote sensing technology. Through the quantitative indicators for evaluating the degradation of the land use planning map data quality, the quantitative indicators are rasterized according to the accuracy required for visual expression. By comparing the quality elements and the content of data quality evaluation, a map for evaluating the degradation of land use planning data quality is obtained, which can accurately evaluate the degradation of map data quality before and after the planning based on the measurement data, and simultaneously can realize the update processing of the map data, and use it again as the original data, and can deduce the long-term degradation process.

Description

Technical Field

[0001] The present invention relates to the technical field of land planning, and specifically to a method for evaluating the degradation of map data quality caused by land use planning adjustment. Background Art

[0002] Land use planning, also known as land planning, refers to a long-term plan for adjusting or allocating the structure and layout of various types of land use in the process of land use, in order to achieve certain goals. It is a comprehensive technical and economic measure for rationally organizing the utilization and management of land resources within a certain area according to the natural and socio-economic conditions of land development and utilization, historical basis and current characteristics, and the needs of national economic development.

[0003] The scale of the land use planning layer stored in the land use planning management information system database is generally 1:10,000, while the boundary of a construction project is mapped through on-site measurement. When the latter scale is used to generate information on the type of land occupied by the project by superimposing the two, due to the difference in the degree of comprehensiveness, the same-name boundaries are often inconsistent, and sometimes the difference is relatively large.

[0004] When evaluating the degradation of the corresponding map data quality caused by land use planning adjustment, directly obtaining data through remote sensing images results in inaccurate data updates, inability to label and adjust the elements and functional areas of the planning area, inability to update based on actual surveying and mapping data, large evaluation errors, poor evaluation effects, inability to update the original data in a timely manner after evaluation, and inability to evaluate and predict the degradation process over time. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for evaluating the degradation of map data quality caused by land use planning adjustment, which solves the technical problems of inability to label and adjust the elements and functional areas of the planning area, inability to update based on actual surveying and mapping data, large evaluation errors, poor evaluation effects, inability to update the original data in a timely manner after evaluation, and inability to evaluate and predict the degradation process over time.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A method for evaluating the degradation of map data quality caused by land use planning adjustment is as follows:

[0008] S1: Obtain the original data of the planning area through the database to obtain the plot dataset before land use planning adjustment;

[0009] S2: Obtain the existing data of the planning area through remote sensing images to obtain the plot dataset after land use planning adjustment;

[0010] S3: By comparing the data of S1 and S2, according to the overlapping boundary lines, reset the measurement coordinates, and through the measuring device, the field mapping data can be re-acquired;

[0011] S4: Differentiate the planned area according to the usage functions of the area, regional measurement can be achieved. After measuring each functional area, secondary mapping of the functional area is realized through remote sensing technology;

[0012] S5: Through multiple data mapping comparisons, simulate the topography according to the area and altitude of the region;

[0013] S6: Set quantitative indicators for evaluating the degradation of the data quality of the land use planning map before and after the adjustment of the land use plan;

[0014] S7: Rasterize the quantitative indicators according to the accuracy required for visual expression, and obtain the land use planning data quality degradation evaluation map by comparing the quality elements and the data quality evaluation content.

[0015] As a further solution of the present invention: in S6, the quantitative indicators are divided into four grades: grade A is 95 - 100%, grade B is 90 - 94%, grade C is 85 - 89%, and grade D is 80 - 84%.

[0016] As a further solution of the present invention: the quality elements include: ID coding correctness, value range consistency, and data integrity, and the data quality evaluation content includes the elements, attributes, and lanes of the planned area.

[0017] As a further solution of the present invention: in S6, the shape measure index value calculated for the plot before the adjustment of the land use plan, and the shape measure index value calculated for the plot after the adjustment of the land use plan.

[0018] As a further solution of the present invention: the measuring device includes a positioning cylinder, a roller, a spirit level, a support plate, a limiting plate, a spring, a rivet, a ring, a chute, a slider, a connecting rod, a wire loop, a direction indicator, a compass, and a scale. A roller is installed between the upper and lower cylindrical walls of the positioning cylinder. Limiting plates are sleeved on the upper and lower parts of the roller. Springs are sleeved on the upper and lower ends of the roller respectively, and the two ends of the spring are fixedly connected to the limiting plate and the positioning cylinder respectively. A ring is sleeved on the top of the positioning cylinder. An annular chute is provided on the circumferential surface of the ring. A slider is arranged inside the chute. A connecting rod is welded on one side of the slider. A direction indicator and a wire loop are respectively fixed at the upper and lower ends of the connecting rod. Four support plates are fixed on the circumferential surface of the bottom of the positioning cylinder in a cross structure. A spirit level is installed on the top side of the support plate. A rivet is welded at the bottom end of the positioning cylinder.

[0019] As a further solution of the present invention: The two positioning cylinders are installed side by side. A measuring tape is arranged inside the positioning cylinder. Both ends of the measuring tape are respectively fixed on the rollers, and the measuring tape is respectively threaded through the two wire loops.

[0020] As a further solution of the present invention: The scale dial is fixed at the top of the positioning cylinder. The direction marking needle is arranged on the side of the scale dial, and the compass is arranged on the top of the scale dial. The central axis of the chassis of the compass is on the same straight line as the central axis of the scale dial.

[0021] As a further solution of the present invention: The central axis of the circular ring is on the same straight line as the central axis of the scale dial.

[0022] Advantages of the present invention:

[0023] By obtaining the data comparison before and after the planned area, according to the overlapping boundary lines, the measurement coordinates are reset. Through the measuring device, the on-site surveying and mapping data can be re-obtained. The planned area is divided according to the area usage function, and regional measurement can be realized. After measuring each functional area, the functional area is surveyed again through remote sensing technology. Through the comparison of multiple surveying and mapping data, the terrain and landform are simulated according to the area and altitude of the area. Through the quantitative indicators of the land use planning map data quality degradation evaluation, the quantitative indicators are rasterized according to the accuracy required for visual expression. According to the comparison of the quality elements and the content of the data quality evaluation, the land use planning overall data quality degradation evaluation map is obtained, which can accurately evaluate the degradation of the map data quality before and after the planning according to the measurement data, and can synchronously update the map data and use it as the original data again, and can deduce the long-term degradation process;

[0024] By measuring the swing angle between two points with the direction marking needle, and with the cooperation of the compass, the directions of the two direction marking needles can be determined, the stretching direction of the measuring tape can be determined, and more accurate marking measurement can be carried out. At the same time, through the remote sensing photography technology, the straight-line distance between two positioning points can be obtained. During the measurement, with the cooperation of four level gauges, the position of the positioning cylinder can be more accurately limited. According to the comparison of the actual measurement data, the terrain can be simulated, the planned area can be surveyed better, the surveying accuracy can be improved, and the data can be updated at the same time, providing accurate evaluation data reference for the degradation of the map data quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.

[0026] Figure 1 It is a system structure diagram of a method for evaluating the degradation of map data quality caused by land use planning adjustment;

[0027] Figure 2 Front orthographic three-dimensional structural schematic diagram of the measuring device;

[0028] Figure 3 Side orthographic three-dimensional structural schematic diagram of the measuring device;

[0029] Figure 4 Top orthographic three-dimensional structural schematic diagram of the measuring device;

[0030] Figure 5 Internal structural schematic diagram of the measuring device;

[0031] In the figure: 1, positioning cylinder; 2, roller; 3, spirit level; 4, supporting plate; 5, limiting plate; 6, hairspring; 7, rivet; 8, ring; 9, sliding groove; 10, slider; 11, connecting rod; 12, wire loop; 13, direction marking needle; 14, compass; 15, scale dial. Specific implementation mode

[0032] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] As Figures 1-5 shown, a method for evaluating the degradation of map data quality caused by land use planning adjustment is as follows:

[0034] S1: Obtain the original data of the planned area through the database to obtain the plot data set before land use planning adjustment;

[0035] S2: Obtain the existing data of the planned area through remote sensing images to obtain the plot data set after land use planning adjustment;

[0036] S3: Through the data comparison of S1 and S2, according to the overlapping boundary lines, re-set the measurement coordinates, and through the measuring device, the field survey data can be re-obtained;

[0037] S4: Divide the planned area according to the area usage function to achieve regional measurement. After measuring each functional area, use remote sensing technology to perform secondary surveying on the functional area;

[0038] S5: Through multiple data surveying and comparison, simulate the topography according to the area and altitude of the region;

[0039] S6: Set the quantitative indicators for evaluating the degradation of the land use planning map data quality before and after land use planning adjustment;

[0040] S7: Rasterize the quantitative indicators according to the accuracy required for visual expression, and compare with the quality elements and data quality evaluation content to obtain the evaluation map of the degradation of the overall data quality of the land use plan.

[0041] As an implementation manner of the present invention, in S6, the quantitative indicators are divided into four levels: level A is 95 - 100%, level B is 90 - 94%, level C is 85 - 89%, and level D is 80 - 84%.

[0042] As an implementation manner of the present invention, the quality elements include: ID coding correctness, value range consistency, and data integrity, and the data quality evaluation content includes the elements, attributes, and lanes of the planned area.

[0043] As an implementation manner of the present invention, in S6, the shape measure index value calculated for the plot before the land use plan adjustment, and the shape measure index value calculated for the plot after the land use plan adjustment.

[0044] As an implementation manner of the present invention, the measuring device includes a positioning cylinder 1, a roller 2, a spirit level 3, a support plate 4, a limiting plate 5, a spring 6, a rivet 7, a ring 8, a chute 9, a slider 10, a connecting rod 11, a wire loop 12, a direction - indicating needle 13, a compass 14, and a scale disk 15. A roller 2 is installed between the upper and lower cylindrical walls of the positioning cylinder 1. Limiting plates 5 are sleeved on the upper and lower parts of the roller 2. Springs 6 are sleeved on the upper and lower ends of the roller 2 respectively, and the two ends of the springs 6 are fixedly connected to the limiting plate 5 and the positioning cylinder 1 respectively. A ring 8 is sleeved on the top of the positioning cylinder 1. An annular chute 9 is formed on the circumferential surface of the ring 8. A slider 10 is arranged inside the chute 9. A connecting rod 11 is welded on one side of the slider 10. A direction - indicating needle 13 and a wire loop 12 are respectively fixed at the upper and lower ends of the connecting rod 11. Four support plates 4 are fixed on the bottom circumferential surface of the positioning cylinder 1 in a cross structure. A spirit level 3 is installed on the top side of the support plate 4. A rivet 7 is welded at the bottom end of the positioning cylinder 1. Two positioning cylinders 1 are installed side by side. A tape measure is arranged inside the positioning cylinder 1, and the two ends of the tape measure are respectively fixed on the roller 2. The tape measure passes through the two wire loops 12 respectively.

[0045] As an implementation manner of the present invention, the scale disk 15 is fixed at the top end of the positioning cylinder 1. The direction - indicating needle 13 is arranged on the side of the scale disk 15, and the compass 14 is arranged on the top of the scale disk 15. The central axis of the chassis of the compass 14 and the central axis of the scale disk 15 are on the same straight line, and the central axis of the ring 8 and the central axis of the scale disk 15 are on the same straight line, which can cooperate to realize the scalar of the offset angle;

[0046] During use, insert one rivet 7 into the positioning coordinates obtained through remote sensing image analysis to fix the first positioning cylinder 1. During measurement, by pulling another positioning cylinder 1 to move, calibration between two points can be achieved. Between the two positioning cylinders 1, measurement is carried out with a tape measure. After the tape measure extends, it is limited by the wire loop 12. During the process of pulling the tape measure, the slider 10 slides in the chute 9, and the swing angle between two points can be measured by the direction indicator needle 13. With the cooperation of the compass 14, the directions of the two direction indicator needles 13 can be determined, the stretching direction of the tape measure can be determined, and more accurate marking and measurement can be carried out. At the same time, through remote sensing photography technology, the straight-line distance between two positioning points can be obtained. During measurement, with the cooperation of four spirit levels 3, the position of the positioning cylinder 1 can be more accurately limited. According to the comparison of actual measurement data, the terrain can be simulated, and better mapping of the planned area can be carried out, improving the accuracy of mapping. At the same time, data update can be achieved, and accurate evaluation data reference can be provided for the degradation of map data quality.

[0047] The working principle of the present invention: During use, measurement is carried out with a tape measure between the two positioning cylinders 1. After the tape measure extends, it is limited by the wire loop 12. During the process of pulling the tape measure, the slider 10 slides in the chute 9, and the swing angle between two points can be measured by the direction indicator needle 13. With the cooperation of the compass 14, the directions of the two direction indicator needles 13 can be determined, the stretching direction of the tape measure can be determined, and more accurate marking and measurement can be carried out. At the same time, through remote sensing photography technology, the straight-line distance between two positioning points can be obtained. During measurement, with the cooperation of four spirit levels 3, the position of the positioning cylinder 1 can be more accurately limited. According to the comparison of actual measurement data, the terrain can be simulated, and better mapping of the planned area can be carried out, improving the accuracy of mapping. At the same time, data update can be achieved, and accurate evaluation data reference can be provided for the degradation of map data quality;

[0048] By obtaining the data comparison before and after the planned area, according to the overlapping boundary lines, the measurement coordinates are reset. Through the measuring device, the on-site mapping data can be re-obtained. The planned area is divided through the area usage function, and regional measurement can be achieved. After measuring each functional area, secondary mapping of the functional area is realized through remote sensing technology. Through the comparison of multiple mapping data, the terrain and landform are simulated according to the area and altitude of the region. Through the quantitative indicators for evaluating the degradation of the land use planning map data quality, the quantitative indicators are rasterized according to the accuracy required for visual expression. According to the comparison of quality elements and data quality evaluation content, the land use planning overall data quality degradation evaluation map is obtained. The degradation of the map data quality before and after the plan can be accurately evaluated based on the measurement data. At the same time, the update process of the map data can be realized and used as the original data again, and the long-term degradation process can be deduced.

[0049] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A method for evaluating the degradation of map data quality caused by land use planning adjustment, characterized in that The steps are as follows: S1: Obtain the original data of the planned area through the database to get the plot dataset before the adjustment of the land use plan; S2: Obtain the existing data of the planned area through remote sensing images to get the plot dataset after the adjustment of the land use plan; S3: Through the comparison of the data in S1 and S2, according to the overlapping boundary lines, reset the measurement coordinates, and through the measuring device, the on-site surveying and mapping data can be re-obtained; S4: Divide the planned area according to the usage function of the area to achieve regional measurement. After measuring each functional area, use remote sensing technology to conduct secondary surveying and mapping of the functional area; S5: Through multiple comparisons of the surveyed data, simulate the topography and landforms according to the area and altitude of the region; S6: Set the quantitative indicators for evaluating the degradation of the data quality of the land use plan map before and after the adjustment of the land use plan; S7: Rasterize the quantitative indicators according to the accuracy required for visual expression, and compare them with the quality elements and data quality evaluation content to obtain the map for evaluating the degradation of the data quality of the land use plan adjustment; 2. The method for evaluating the degradation of map data quality caused by the adjustment of land use planning according to claim 1, wherein In S6, the quantitative indicators are divided into four levels: level A is 95 - 100%, level B is 90 - 94%, level C is 85 - 89%, and level D is 80 - 84%.

3. The method for evaluating the degradation of map data quality caused by the adjustment of land use planning according to claim 1, characterized in that, The quality elements include: ID coding correctness, value range consistency, and data integrity. The data quality evaluation content includes the elements, attributes, and lanes of the planned area.

4. The method for evaluating the degradation of map data quality caused by the adjustment of land use planning according to claim 1, wherein In S6, the shape measure index values calculated for the plots before the adjustment of the land use plan and the shape measure index values calculated for the plots after the adjustment of the land use plan.

5. The method for evaluating the degradation of map data quality caused by the adjustment of land use planning according to claim 1, the measuring device in step S3, characterized in that, It includes a positioning cylinder (1), a roller (2), a spirit level (3), a support plate (4), a limit plate (5), a spring (6), a rivet (7), a circular ring (8), a chute (9), a slider (10), a connecting rod (11), a wire loop (12), a direction indicating needle (13), a compass (14) and a scale disk (15). A roller (2) is installed between the upper and lower cylindrical walls of the positioning cylinder (1). Limit plates (5) are sleeved on the upper and lower parts of the roller (2). Springs (6) are sleeved on the upper and lower ends of the roller (2) respectively, and the two ends of each spring (6) are fixedly connected to the limit plate (5) and the positioning cylinder (1). A circular ring (8) is sleeved on the top of the positioning cylinder (1). An annular chute (9) is formed on the circumferential surface of the circular ring (8). A slider (10) is arranged inside the chute (9). A connecting rod (11) is welded on one side of the slider (10). A direction indicating needle (13) and a wire loop (12) are respectively fixed at the upper and lower ends of the connecting rod (11). Four support plates (4) are fixed on the bottom circumferential surface of the positioning cylinder (1) in a cross structure. A spirit level (3) is installed on the top side of the support plate (4). A rivet (7) is welded at the bottom end of the positioning cylinder (1). The two positioning cylinders (1) are installed side by side. A tape measure is arranged inside the positioning cylinder (1), and the two ends of the tape measure are respectively fixed on the roller (2). The tape measure passes through the two wire loops (12) respectively. The scale disk (15) is fixed at the top end of the positioning cylinder (1). The direction indicating needle (13) is arranged on the side of the scale disk (15). The compass (14) is arranged on the top side of the scale disk (15). The central axis of the chassis of the compass (14) is on the same straight line as the central axis of the scale disk (15). The central axis of the circular ring (8) is on the same straight line as the central axis of the scale disk (15).

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