ArcGIS-based parcel boundary information calculation method and system

Abstract

This invention relates to the field of geographic information technology, specifically to a method and system for calculating the boundaries of a land parcel based on ArcGIS. First, the land parcel elements and boundary relationship elements of the parcel to be calculated are merged into the same element class, marked as the target element class. Geometric center X and geometric center Y fields are added to the target element class, and corresponding point element classes are constructed using the geometric center of each element surface to represent its spatial location. Then, corresponding Thiessen polygons are created based on the point element classes, and the boundary lines of the Thiessen polygons are extracted to form boundary line element classes. The direction of the boundary lines is calculated and converted into the relative orientation relationship of the corresponding land parcel, generating a dictionary recording the orientation relationships. Based on the dictionary, the boundaries of the land parcel to be calculated are generated. Compared with traditional methods that rely on manual identification to obtain land parcel boundary information, this application improves the efficiency and accuracy of acquiring land parcel boundary information, significantly saving time and labor costs.

Description

Technical Field

[0001] This invention relates to the field of geographic information technology, specifically to a method and system for calculating the boundaries of land parcels based on ArcGIS. Background Technology

[0002] A land parcel refers to a closed plot of land defined by ownership boundaries; it is a piece of land on the Earth's surface with definite boundaries and ownership. The four boundaries of a land parcel refer to the boundaries between the parcel and adjacent land in four directions. Typically, the names of the landowners, users, or individuals of the four adjacent land parcels need to be filled in; if the adjacent land parcels are roads, ditches, or other landmarks, their names are filled in accordingly. The boundaries of a land parcel allow for quick definition of its extent and are an important component of cadastral information management, processing, and analysis. Currently, the boundaries of land parcels are mainly obtained by staff through visual identification and mental judgment, and then manually entered into an attribute table. This method is not only inefficient but also prone to errors due to fatigue. Summary of the Invention

[0003] The main objective of this invention is to provide a method and system for calculating the boundaries of land parcels based on ArcGIS, aiming to solve the problems of inefficiency and errors caused by fatigue in obtaining the boundaries of land parcels by relying on human visual identification and mental judgment.

[0004] The technical solution proposed in this invention is as follows:

[0005] A method for calculating land parcel boundary information based on ArcGIS, applied to an ArcGIS-based land parcel boundary information calculation system; the system includes a computing terminal; the computing terminal runs ArcGIS software; the method includes:

[0006] The computing terminal acquires and merges the parcel elements and boundary relationship reference elements of the parcel to be calculated, and marks the merged parcel elements and boundary relationship reference elements as target element classes;

[0007] The computing terminal adds two double-precision type fields to the target feature class, wherein the two double-precision type fields are geometric center X and geometric center Y, respectively;

[0008] The computing terminal uses two double-precision type fields as tool parameters to generate a geometric center point feature class, wherein the geometric center point feature class contains unique identifier information for tracing the original parcel features;

[0009] The computing terminal converts the geometric center point feature class into the corresponding Thiessen polygon;

[0010] The computing terminal extracts the boundary lines of the Thiessen polygons, selects the LEFT_FID and RIGHT_FID fields of the Thiessen polygons as fusion fields to optimize the boundary lines of the Thiessen polygons, thereby forming a boundary line feature class.

[0011] The computing terminal traverses all line elements in the boundary line element class, treats the two-point line as a vector, calculates the direction of the vector, and converts it into the orientation relationship of the polygons on the left and right sides of the two-point line, so as to generate a dictionary that records the orientation relationship.

[0012] The computing terminal generates the boundary information of the land parcel to be calculated based on a dictionary.

[0013] Preferably, the computing terminal acquires and merges the parcel elements and boundary relationship reference elements of the parcel to be calculated, and marks the merged parcel elements and boundary relationship reference elements as target element classes, including:

[0014] The computing terminal uses the merge or append tool of ArcGIS software to store the parcel features and boundary relationship reference features of the parcel to be calculated in the same feature class and mark it as the target feature class. The boundary relationship reference features are the nearby features of the parcel to be calculated, and the target feature class includes at least two fields, namely the parcel unique identifier and the parcel name.

[0015] Preferably, the computing terminal adds two double-precision type fields to the target feature class, and then further includes:

[0016] The computing terminal performs field calculations on two double-precision type fields using the field calculator in ArcGIS software. The field calculation includes two calculation parameters: one is the X-coordinate of the lower left corner of the current graphic's bounding rectangle plus half the width of the current graphic's bounding rectangle, and the other is the Y-coordinate of the lower left corner of the current graphic's bounding rectangle plus half the height of the current graphic's bounding rectangle.

[0017] Preferably, the computing terminal uses two double-precision type fields as tool parameters to generate a geometric center point feature class, including:

[0018] The computing terminal uses the XY table to point conversion tool in ArcGIS software to generate geometric center point feature classes using geometric center X and geometric center Y as tool parameters.

[0019] Preferably, the computing terminal converts the geometric center point feature class into the corresponding Thiessen polygon, including:

[0020] The computing terminal uses the geometric center point feature class as the tool parameter and converts the geometric center point feature class into the corresponding Thiessen polygon using the Create Thiessen Polygon tool in ArcGIS software.

[0021] Preferably, the computing terminal extracts the boundary lines of the Thiessen polygons, selects the LEFT_FID and RIGHT_FID fields of the Thiessen polygons as fusion fields to optimize the boundary lines of the Thiessen polygons, thereby forming a boundary line feature class, including:

[0022] The computing terminal uses the polygon-to-line tool in ArcGIS software to extract the boundary lines of the Thiessen polygons;

[0023] The computing terminal uses the fusion tool of ArcGIS software to select the LEFT_FID and RIGHT_FID fields of the Thiessen polygon as fusion fields to optimize the boundary line of the Thiessen polygon, thereby forming a boundary line feature class. The boundary line feature class has the following characteristics: all boundary line feature classes are two-point lines; if any two adjacent faces have a common boundary, the common boundary is only one common boundary line feature. The boundary line feature class contains the LEFT_FID field and the RIGHT_FID field. The LEFT_FID field is used to record the unique identifier of the face feature of the Thiessen polygon corresponding to the left side of the vector from the start point to the end point of the line, and the RIGHT_FID field is used to record the unique identifier of the face feature of the Thiessen polygon corresponding to the right side of the vector from the start point to the end point of the line.

[0024] Preferably, the dictionary includes corresponding keys and values; the keys of the dictionary are unique identifiers of Thiessen polygons, and the values ​​of the dictionary are nested lists, each containing one or more lists recording the unique identifiers and azimuths of all adjacent polygons of the Thiessen polygon corresponding to the key.

[0025] Preferably, the computing terminal generates the boundary information of the land parcel to be calculated based on a dictionary, including:

[0026] The computing terminal converts the keys and unique identifiers in the values ​​of the dictionary into land parcel names;

[0027] The computing terminal selects the portion of the four cardinal directions that is closest to the four cardinal directions (north, south, east, and west) from all the azimuth angles recorded in the dictionary, and uses it as the description of the four cardinal directions of the land parcel.

[0028] The computing terminal generates land parcel boundary information, which includes the land parcel name and the corresponding land parcel boundary description.

[0029] This invention proposes a land parcel boundary information calculation system based on ArcGIS, and applies an ArcGIS-based land parcel boundary information calculation method; the system includes a computing terminal; the computing terminal runs ArcGIS software.

[0030] The above technical solution can achieve the following beneficial effects:

[0031] This invention proposes an ArcGIS-based method for calculating land parcel boundary information, providing a more efficient and convenient technical solution for acquiring such information. Specifically, the method first merges the land parcel elements and boundary relationship elements into a single element class, labeled as the target element class. A geometric center X and a geometric center Y are added to the target element class, and corresponding point element classes are constructed using the geometric centers of each element facet to represent its spatial location. Then, corresponding Thiessen polygons are created based on these point element classes, and their boundary lines are extracted to form boundary line element classes. The direction of the boundary lines is calculated and converted into their corresponding relative orientation relationships within the land parcel, generating a dictionary that records these orientation relationships. This dictionary then generates the land parcel boundary information for the land parcel to be calculated. The proposed solution overcomes the shortcomings of traditional manual identification for obtaining land parcel boundary information, improves the efficiency and accuracy of acquiring such information, and automates the processing of land parcel boundary information through a computing terminal, significantly saving time and labor costs. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0033] Figure 1 This is a flowchart illustrating the first embodiment of a method for calculating the boundaries of a land parcel based on ArcGIS, as proposed in this invention. Detailed Implementation

[0034] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0035] This invention proposes a method and system for calculating the boundaries of land parcels based on ArcGIS.

[0036] As attached Figure 1As shown, in the first embodiment of the method for calculating land parcel boundary information based on ArcGIS proposed in this invention, this method is applied to a land parcel boundary information calculation system based on ArcGIS; the system includes a computing terminal (e.g., a computer); the computing terminal runs ArcGIS software, which is a geographic information system desktop software that provides GIS professionals with core functions such as data acquisition, analysis, mapping, and spatial modeling. It has built-in applications such as ArcMap and ArcCatalog and supports extended modules to achieve specialized capabilities such as 3D analysis and network analysis; this embodiment includes the following steps:

[0037] Step S110: The computing terminal acquires and merges the parcel elements and boundary relationship reference elements of the parcel to be calculated, and marks the merged parcel elements and boundary relationship reference elements as the target element class.

[0038] Specifically, in ArcGIS software, "feature class" and "feature" are technical terms; from the perspective of data organization, a feature class can be understood as a layer, and each graphic in the layer corresponds to a feature.

[0039] Therefore, the parcel elements in this application refer to several polygonal figures representing the boundary relationships of the parcels to be calculated. These are typically stored in a polygonal element class. The boundary relationship reference elements in this application, on the other hand, are other polygonal figures located spatially near the parcels to be calculated. These boundary relationship reference elements are also stored in other polygonal element classes. By merging or adding elements, the aforementioned multiple polygonal element classes (including the polygonal element class used to represent the parcel elements and the polygonal element class used to represent the boundary relationship reference elements) are all stored in a single element class, namely the target element class in this step.

[0040] Step S120: The computing terminal adds two double-precision type fields to the target feature class, wherein the two double-precision type fields are geometric center X and geometric center Y, respectively.

[0041] Step S130: The computing terminal generates a geometric center point feature class using two double-precision type fields as tool parameters. The geometric center point feature class contains unique identifier information for tracing the original parcel features.

[0042] Step S140: The computing terminal converts the geometric center point feature class into the corresponding Thiessen polygon.

[0043] Specifically, the Thiessen polygon, also known as the Voronoi diagram, is a set of continuous polygons composed of perpendicular bisectors of line segments connecting two adjacent points. The distance from any point within the Thiessen polygon to the control point constituting the polygon is less than the distance to the control points of other polygons.

[0044] Step S150: The computing terminal extracts the boundary line of the Thiessen polygon, selects the LEFT_FID field and RIGHT_FID field of the Thiessen polygon as fusion fields to optimize the boundary line of the Thiessen polygon, thereby forming a boundary line feature class.

[0045] Specifically, in ArcGIS software: the LEFT_FID field is the feature ID of the input surface to the left of the output line, and the RIGHT_FID field is the feature ID of the input surface to the right of the output line.

[0046] Step S160: The computing terminal traverses all line elements in the boundary line element class, treats the two-point line as a vector, calculates the direction of the vector, and converts it into the orientation relationship of the polygons on the left and right sides of the two-point line, so as to generate a dictionary that records the orientation relationship.

[0047] Step S170: The computing terminal generates the boundary information of the land parcel to be calculated based on the dictionary.

[0048] This invention proposes an ArcGIS-based method for calculating land parcel boundary information, providing a more efficient and convenient technical solution for acquiring such information. Specifically, the method first merges the land parcel elements and boundary relationship elements into a single element class, labeled as the target element class. A geometric center X and a geometric center Y are added to the target element class, and corresponding point element classes are constructed using the geometric centers of each element facet to represent its spatial location. Then, corresponding Thiessen polygons are created based on these point element classes, and their boundary lines are extracted to form boundary line element classes. The direction of the boundary lines is calculated and converted into their corresponding relative orientation relationships within the land parcel, generating a dictionary that records these orientation relationships. This dictionary then generates the land parcel boundary information for the land parcel to be calculated. The proposed solution overcomes the shortcomings of traditional manual identification for obtaining land parcel boundary information, improves the efficiency and accuracy of acquiring such information, and automates the processing of land parcel boundary information through a computing terminal, significantly saving time and labor costs.

[0049] Currently, most methods for calculating the boundaries of land parcels are search-based, involving searching for adjacent elements within a specific direction or distance of the target parcel and then summarizing the search results to calculate the boundaries. The drawback of this approach is that obtaining more accurate results inevitably requires a larger computational load, but the search results are unpredictable. Therefore, a balance must be struck between the completeness of the boundaries and the time consumed by the search computation. The technical solution presented in this application is more efficient.

[0050] In the second embodiment of the method for calculating the boundaries of land parcels based on ArcGIS proposed in this invention, based on the first embodiment, step S110 includes the following steps:

[0051] Step S210: The computing terminal uses the merge or append tool of ArcGIS software to store the parcel features and boundary relationship reference features of the parcel to be calculated in the same feature class and marks it as the target feature class. The boundary relationship reference features are the nearby features of the parcel to be calculated, and the target feature class includes at least two fields, namely the parcel unique identifier and the parcel name.

[0052] Specifically, in this embodiment, the boundary reference elements refer to other elements located near the land parcel element to be calculated. For example, when the land parcel to be calculated is a rural house parcel, the cultivated land, forest land, roads, and water systems near the house parcel are the boundary reference elements, which constitute the boundary information of the house parcel.

[0053] For example, the boundary information of a rural house land parcel (to be calculated) needs to be described using graphics of rivers, roads, farmland, and forest land around the house as references. For example, the final boundary information of the land parcel is: Xu's homestead is bounded by a small ditch to the east, Yang's farmland to the south, XXX Township Road to the west, and Zhang's forest land to the north. Among them, "Xu's homestead" is the land parcel to be calculated in this application, and the description of the boundaries all uses boundary relationship reference elements.

[0054] In the third embodiment of the method for calculating the boundaries of land parcels based on ArcGIS proposed in this invention, based on the second embodiment, step S120 is followed by the following steps:

[0055] Step S310: The computing terminal performs field calculations on two double-precision type fields using the field calculator in ArcGIS software. The field calculation includes two calculation parameters: one is the sum of the X-coordinate of the lower left corner of the current graphic's outer rectangle and half the sum of the width of the current graphic's outer rectangle; the other is the sum of the Y-coordinate of the lower left corner of the current graphic's outer rectangle and half the sum of the height of the current graphic's outer rectangle.

[0056] Specifically, the above field calculation steps are completed using the ArcGIS software's field calculator. These calculations require specific syntax and include: !SHAPE.extent.XMin! represents the X-coordinate of the bottom-left corner of the current graphic's bounding rectangle; !SHAPE.extent.width! represents the width of the current graphic's bounding rectangle, i.e., the span of coordinate values ​​along the X-axis (east-west direction); !SHAPE.extent.YMin! represents the Y-coordinate of the bottom-left corner of the current graphic's bounding rectangle; and !SHAPE.extent.height! represents the height of the current graphic's bounding rectangle, the span of coordinate values ​​along the Y-axis (north-south direction).

[0057] In the fourth embodiment of the method for calculating the boundaries of land parcels based on ArcGIS proposed in this invention, based on the third embodiment, step S130 includes the following steps:

[0058] Step S410: The computing terminal generates a geometric center point feature class using the XY table to point conversion tool of ArcGIS software with geometric center X and geometric center Y as tool parameters.

[0059] Specifically, as mentioned earlier, each feature class corresponds to a layer. Here, the geometric center point feature class is used to refer to the point layer obtained in this step.

[0060] In the fifth embodiment of the method for calculating the boundaries of land parcels based on ArcGIS proposed in this invention, based on the fourth embodiment, step S140 includes the following steps:

[0061] Step S510: The computing terminal uses the geometric center point feature class as the tool parameter and the ArcGIS software's Create Thiessen Polygon tool to convert the geometric center point feature class into the corresponding Thiessen polygon.

[0062] Specifically, polygons are formed by calculating the perpendicular bisectors between adjacent points. The space around each geometric center point is divided into a polygon, and any location within the polygon is closer to the geometric center point than any other geometric center point is closer to the geometric center point.

[0063] In the sixth embodiment of the method for calculating the boundaries of land parcels based on ArcGIS proposed in this invention, based on the fifth embodiment, step S150 includes the following steps:

[0064] Step S610: The computing terminal extracts the boundary lines of the Thiessen polygons using the polygon-to-line tool in ArcGIS software.

[0065] Step S620: The computing terminal uses the fusion tool of ArcGIS software to select the LEFT_FID and RIGHT_FID fields of the Thiessen polygon as fusion fields to optimize the boundary line of the Thiessen polygon, thereby forming a boundary line feature class. The boundary line feature class has the following characteristics: all boundary line feature classes are two-point lines; if any two adjacent faces have a common boundary, the common boundary is only one common boundary line feature. The boundary line feature class contains the LEFT_FID field and the RIGHT_FID field. The LEFT_FID field is used to record the unique identifier of the face feature of the Thiessen polygon corresponding to the left side of the vector from the start point to the end point of the line. The RIGHT_FID field is used to record the unique identifier of the face feature of the Thiessen polygon corresponding to the right side of the vector from the start point to the end point of the line.

[0066] Specifically, as mentioned earlier, each feature class corresponds to a layer. Here, the boundary line feature class is used to refer to the boundary line layer obtained in this step.

[0067] In the seventh embodiment of the ArcGIS-based method for calculating the boundaries of land parcels proposed in this invention, based on the sixth embodiment, the dictionary includes corresponding keys and values; the keys of the dictionary are unique identifiers of Thiessen polygons, and the values ​​of the dictionary are nested lists, which record the unique identifiers and azimuths of all adjacent polygons of the Thiessen polygon corresponding to the key in the form of one or more lists.

[0068] In the eighth embodiment of the method for calculating the boundaries of land parcels based on ArcGIS proposed in this invention, based on the seventh embodiment, step S170 includes the following steps:

[0069] Step S810: The computing terminal converts the keys and unique identifiers in the dictionary into parcel names.

[0070] Step S820: The computing terminal selects the part of the four cardinal directions that is closest to the four cardinal directions (north, south, east, and west) from all the azimuth angles recorded in the dictionary values, and uses it as the description of the boundaries of the land parcel.

[0071] Step S830: The computing terminal generates land parcel boundary information, wherein the land parcel boundary information includes the land parcel name and the corresponding land parcel boundary description.

[0072] Specifically, this embodiment provides the steps for obtaining the four boundaries of a land parcel based on a dictionary, namely, identifying the other land parcels that are closest to the land parcel to be calculated in the four cardinal directions (north, south, east, and west).

[0073] The present invention also proposes a land parcel boundary information calculation system based on ArcGIS, and applies a land parcel boundary information calculation method based on ArcGIS; the system includes a computing terminal; the computing terminal runs ArcGIS software.

[0074] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0075] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A method for calculating the boundaries of a land parcel based on ArcGIS, characterized in that, Applied to an ArcGIS-based land parcel boundary information calculation system; The system includes a computing terminal; the computing terminal runs ArcGIS software; the method includes: The computing terminal acquires and merges the parcel elements and boundary relationship reference elements of the parcel to be calculated, and marks the merged parcel elements and boundary relationship reference elements as target element classes; The computing terminal adds two double-precision type fields to the target feature class, wherein the two double-precision type fields are the X coordinate value and the Y coordinate value of the geometric center, respectively; The computing terminal uses two double-precision type fields as tool parameters to generate a geometric center point feature class, wherein the geometric center point feature class contains unique identifier information for tracing the original parcel features; The computing terminal converts the geometric center point feature class into the corresponding Thiessen polygon; The computing terminal extracts the boundary line of the Thiessen polygon, selects the LEFT_FID and RIGHT_FID fields of the Thiessen polygon as fusion fields to optimize the boundary line of the Thiessen polygon, thereby forming a boundary line feature class. The computing terminal traverses all line elements in the boundary line element class, treats the two-point line as a vector, calculates the direction of the vector, and converts it into the orientation relationship of the polygons on the left and right sides of the two-point line, so as to generate a dictionary that records the orientation relationship. The computing terminal generates the boundary information of the land parcel to be calculated based on a dictionary; The computing terminal acquires and merges the parcel elements and boundary relationship reference elements of the parcel to be calculated, and marks the merged parcel elements and boundary relationship reference elements as target element classes, including: The computing terminal uses the merge or append tool of ArcGIS software to store the parcel features and boundary relationship reference features of the parcel to be calculated in the same feature class and mark it as the target feature class. The boundary relationship reference features are the nearby features of the parcel to be calculated, and the target feature class includes at least two fields, namely the parcel unique identifier and the parcel name.

2. The method for calculating the boundaries of a land parcel based on ArcGIS according to claim 1, characterized in that, The computing terminal adds two double-precision type fields to the target feature class, and then includes: The computing terminal performs field calculations on two double-precision type fields using the field calculator in ArcGIS software. The field calculation includes two calculation parameters: one is the X-coordinate of the lower left corner of the current graphic's bounding rectangle plus half the width of the current graphic's bounding rectangle, and the other is the Y-coordinate of the lower left corner of the current graphic's bounding rectangle plus half the height of the current graphic's bounding rectangle.

3. The method for calculating the boundaries of a land parcel based on ArcGIS according to claim 2, characterized in that, The computing terminal uses two double-precision type fields as tool parameters to generate a geometric center point feature class, including: The computing terminal uses the XY table to point conversion tool in ArcGIS software to generate geometric center point feature classes using geometric center X and geometric center Y as tool parameters.

4. The method for calculating the boundaries of a land parcel based on ArcGIS according to claim 3, characterized in that, The computing terminal converts the geometric center point feature class into the corresponding Thiessen polygon, including: The computing terminal uses the geometric center point feature class as the tool parameter and converts the geometric center point feature class into the corresponding Thiessen polygon using the Create Thiessen Polygon tool in ArcGIS software.

5. The method for calculating the boundaries of a land parcel based on ArcGIS according to claim 4, characterized in that, The computing terminal extracts the boundary lines of the Thiessen polygons, selects the LEFT_FID and RIGHT_FID fields of the Thiessen polygons as fusion fields to optimize the boundary lines of the Thiessen polygons, thereby forming a boundary line feature class, including: The computing terminal uses the polygon-to-line tool in ArcGIS software to extract the boundary lines of the Thiessen polygons; The computing terminal uses the fusion tool of ArcGIS software to select the LEFT_FID and RIGHT_FID fields of the Thiessen polygon as fusion fields to optimize the boundary line of the Thiessen polygon, thereby forming a boundary line feature class. The boundary line feature class has the following characteristics: all boundary line feature classes are two-point lines; if any two adjacent faces have a common boundary, the common boundary is only one common boundary line feature. The boundary line feature class contains the LEFT_FID field and the RIGHT_FID field. The LEFT_FID field is used to record the unique identifier of the face feature of the Thiessen polygon corresponding to the left side of the vector from the start point to the end point of the line, and the RIGHT_FID field is used to record the unique identifier of the face feature of the Thiessen polygon corresponding to the right side of the vector from the start point to the end point of the line.

6. The method for calculating the boundaries of a land parcel based on ArcGIS according to claim 5, characterized in that, The dictionary includes corresponding keys and values; the keys of the dictionary are unique identifiers of Thiessen polygons, and the values ​​of the dictionary are nested lists, each containing one or more lists recording the unique identifiers and azimuths of all adjacent polygons of the corresponding Thiessen polygon.

7. The method for calculating the boundaries of a land parcel based on ArcGIS according to claim 6, characterized in that, The computing terminal generates the boundary information of the land parcel to be calculated based on a dictionary, including: The computing terminal converts the keys and unique identifiers in the values ​​of the dictionary into land parcel names; The computing terminal selects the portion of the four cardinal directions that is closest to the four cardinal directions (north, south, east, and west) from all the azimuth angles recorded in the dictionary, and uses it as the description of the four cardinal directions of the land parcel. The computing terminal generates land parcel boundary information, which includes the land parcel name and the corresponding land parcel boundary description.

8. A land parcel boundary information calculation system based on ArcGIS, characterized in that, The method for calculating the boundaries of a land parcel based on ArcGIS, as described in any one of claims 1-7, is used; the system includes a computing terminal; the computing terminal runs ArcGIS software.

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