CN116307404A - Cultivated land entity data cutting method, cultivated land entity data cutting equipment and storage equipment - Google Patents

Cultivated land entity data cutting method, cultivated land entity data cutting equipment and storage equipment Download PDF

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CN116307404A
CN116307404A CN202310592393.9A CN202310592393A CN116307404A CN 116307404 A CN116307404 A CN 116307404A CN 202310592393 A CN202310592393 A CN 202310592393A CN 116307404 A CN116307404 A CN 116307404A
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geometry
data
cutting
cultivated land
entity
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CN116307404B (en
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王明
俞鹏
樊迪
郑凯
王静怡
李蕊娟
王景华
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Geospace Information Technology Co ltd
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Abstract

The invention relates to a method, equipment and storage equipment for cutting farmland entity data, wherein the method comprises the following steps: acquiring first GeometryB of cultivated land entity space data and agricultural rights space data; obtaining a cutting line L according to the geometry B, and cutting the real space data geometry A of the cultivated land by using the cutting line L to obtain two cut data geometry A1 and geometry A2; replacing the geometry A with the geometry A2; reading the next geometry B of the agro-weighted spatial data, judging whether the next geometry B is the last geometry B, and if not, returning to the step S2; otherwise, entering step S5; outputting all the aggregate of the GeometryA1 and the last GeometryA2 to obtain the cut cultivated land entity data set. The beneficial effects are that: under the condition of ensuring that the boundaries of the cultivated land entity data are not damaged, the cultivated land entity data refinement and cutting according to the agricultural authorization data are realized.

Description

Cultivated land entity data cutting method, cultivated land entity data cutting equipment and storage equipment
Technical Field
The present invention relates to the field of data processing, and in particular, to a method and an apparatus for cutting data of a cultivated land entity, and a storage device.
Background
The natural geographic entity comprises mountain bodies, water systems, ice and snow, sea, agriculture and forestry land and soil, wherein the agriculture and forestry land and soil entity comprises cultivated land entity.
The cultivated land entity data can be converted from paddy fields, dry lands, vegetable lands, aquatic crop lands and the like in the 1:5001:1000 1:2000 basic geographic information element data.
However, the cultivated land entity data obtained by the method is large-block pattern data distinguished according to the land types, can only meet the space positioning requirement, and cannot meet the requirement of land right management in natural resource management. Therefore, the data of the cultivated land entity is required to be thinned and cut according to the rights data, so that finer cultivated land management is realized, and the basic mapping and guaranteeing service capability is improved.
The rights data generally adopts rural land contract management rights data (hereinafter referred to as 'agricultural rights data'), but compared with cultivated land entity data, the agricultural rights data cannot be completely overlapped due to the problems of inconsistent acquisition precision, inconsistent standards, inconsistent operators and the like.
If the farmland entity data (higher precision) is subjected to graphic clipping directly according to the farmland entity data (lower precision), more fine dust patterns can be generated, original spatial graphic data of the farmland entity are damaged, and the spatial data precision is reduced.
Disclosure of Invention
In order to solve the technical problem of original space graphic data destruction caused by low data precision generated by directly carrying out graphic cutting on the cultivated land entity data according to the agricultural right data, the invention provides a cultivated land entity data cutting method, equipment and storage equipment, wherein the method specifically comprises the following steps:
s1: acquiring first GeometryB of tillable physical space data GeometryA and agro-weighted space data;
s2: obtaining a cutting line L according to the geometry B, and cutting the real space data geometry A of the cultivated land by using the cutting line L to obtain two cut data geometry A1 and geometry A2;
s3: replacing the geometry A with the geometry A2;
s4: reading the next geometry B of the agro-weighted spatial data, judging whether the next geometry B is the last geometry B, and if not, returning to the step S2; otherwise, entering step S5;
s5: outputting all the aggregate of the GeometryA1 and the last GeometryA2 to obtain the cut cultivated land entity data set.
The storage device stores instructions and data for implementing a cultivated land entity data cutting method.
A tilling entity data cutting apparatus comprising: a processor and the storage device; and the processor loads and executes the instructions and the data in the storage device to realize a cultivated land entity data cutting method.
The beneficial effects provided by the invention are as follows: under the condition of ensuring that the boundaries of the cultivated land entity data are not damaged, the cultivated land entity data refined and cut according to the agricultural rights data are realized, and the cultivated land entity data refined according to rights are obtained.
Drawings
FIG. 1 is a schematic flow chart of the method of the present invention;
FIG. 2 is a schematic illustration of incomplete overlapping of the outline of farmland entity data and agricultural weight data;
FIG. 3 is the effect of graphic cropping of arable land entity data directly from agricultural weight data;
FIG. 4 is an exemplary diagram of steps S24-S26;
FIG. 5 is a schematic representation of the cutting results obtained by the method of the present invention;
FIG. 6 is a schematic diagram of the operation of a hardware device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a flow chart of the method of the present invention; the invention provides a cultivated land entity data cutting method, which specifically comprises the following steps:
s1: acquiring first GeometryB of tillable physical space data GeometryA and agro-weighted space data;
in the embodiment of the present application, for convenience of explanation, it is assumed that the arable land entity space data includes only one piece of data;
it should be noted that, because the agricultural weighted data includes the weight information, the data information is more detailed, so in the embodiment of the present application, it is assumed that the agricultural weighted data includes a plurality of pieces of data, so the aforementioned geometry b represents the first piece of data in the agricultural weighted data, which is also convenient for illustration.
Referring to fig. 2, fig. 2 is a schematic diagram showing that the outline of the cultivated land entity data and the outline of the agricultural weight data are not completely overlapped;
in fig. 2, a) is a representation of cultivated land physical space data; b) Schematic representation of the agricultural rights data; c) Is an illustration of the combination of two data.
As can be seen from fig. 2, compared with the farmland entity data, the agricultural rights data have inconsistent acquisition precision, inconsistent standards, inconsistent operators and the like, so that the outer contours of the two data cannot be completely overlapped. For example, referring to fig. 3, fig. 3 is an effect of performing graphic clipping on farmland entity data directly according to agricultural weight data. It can be seen that, due to inconsistent precision, standards and the like, a part of original farmland entity data is lost after cutting.
In this application, the first geometry b may be considered as the first rectangular box of b) in fig. 2; the application realizes the rights cutting according to the cutting line L, and solves the problems.
S2: obtaining a cutting line L according to the geometry B, and cutting the real space data geometry A of the cultivated land by using the cutting line L to obtain two cut data geometry A1 and geometry A2;
in step S2, the process of obtaining the cutting line L according to the geometry b is as follows:
s21, obtaining intersection of the Geometry A and the Geometry B to obtain Geometry C;
s22, deleting the vertexes of the GeometryC which are the same as those of GeometryA to obtain a point set { p } of the fold line D 1 ,p 2 ,...,p n }；
S23, let i=1;
s24, calculating the points p respectively i 、p i+1 Distance to all sides of the geometry A and find the minimum d of all distances mini And d mini+1 ；
S25, if d mini And d mini+1 All are smaller than the preset threshold r, the line segment p is not reserved i p i+1 The method comprises the steps of carrying out a first treatment on the surface of the If d mini And d mini+1 One or two of the segments are larger than or equal to a preset threshold r, and the segment p is reserved i p i+1 Adding points pi, pi+1 to the vertex set of polyline L;
s26, enabling i to be added with 1, judging whether i is equal to n or not, and if not, returning to the step S24; otherwise, take the first and last two vertexes P of the broken line L a And P b The method comprises the steps of carrying out a first treatment on the surface of the Judging P a Relationship with geometry a: if P a Outside the geometry A, take line segment P a P a+1 Intersection point O with GeomeryA replaces P a The method comprises the steps of carrying out a first treatment on the surface of the If P a Intersecting with GeomeryA, P is preserved a The method comprises the steps of carrying out a first treatment on the surface of the If P a Within the geometry A, the line segment P is lengthened a+1 P a Taking the intersection point O of the extension line and the geometry A, and adding the intersection point O to the coordinate string P a Front; judging P again b Relationship with geometry a: if P b Outside the geometry A, take line segment P b P b-1 Intersection point O with GeomeryA replaces P b The method comprises the steps of carrying out a first treatment on the surface of the If P b Intersecting with GeomeryA, P is preserved b The method comprises the steps of carrying out a first treatment on the surface of the If P b Within the geometry A, the line segment P is lengthened b-1 P b Taking the intersection point O of the extension line and the geometry A, and adding the intersection point O to the coordinate string P b Afterwards;
s27, collecting connecting lines of all points of the folding line L are used as cutting lines L.
Specifically, the process of steps S21 to S26 is shown in FIG. 4. FIG. 4 is an exemplary diagram of steps S24-S26.
As can be seen from FIG. 4, in step S25, when the line segment is P 1 P 2 When d min2 Greater than a threshold valuer, reserve P 1 P 2 The method comprises the steps of carrying out a first treatment on the surface of the When the line segment is P 2 P 3 When d min2 、d min3 Greater than threshold r, P is reserved 2 P 3 The method comprises the steps of carrying out a first treatment on the surface of the When the line segment is P 3 P 4 When d min3 Greater than threshold r, P is reserved 1 P 2 The method comprises the steps of carrying out a first treatment on the surface of the When the line segment is P 4 P 5 When d min4 、d min5 Less than the threshold r, P is not reserved 4 P 5 The method comprises the steps of carrying out a first treatment on the surface of the When the line segment is P 5 P 6 When d min5 、d min6 Less than the threshold r, P is not reserved 5 P 6 The method comprises the steps of carrying out a first treatment on the surface of the When the line segment is P 6 P 7 When d min6 、d min7 Less than the threshold r, P is not reserved 6 P 7 ；
As can be seen from fig. 4, in step S26, P 1 Intersecting with the geometry A, and directly reserving; p (P) 4 Inside the GeomeryA, then along line segment P 3 P 4 And (5) extending, and taking the intersection point O of the Geometry A.
In the above process, the value of the threshold r is 2.4 meters. Since the agricultural weight data is generally implemented by using a 1:2000 scale map, and the error of the 1:2000 scale map in the point positions of the flat land and the hilly area is +/-1.2 meters, the threshold value selects the maximum error of 2.4 meters.
S3: replacing the geometry A with the geometry A2;
s4: reading the next geometry B of the agro-weighted spatial data, judging whether the next geometry B is the last geometry B, and if not, returning to the step S2; otherwise, entering step S5;
s5: outputting all the aggregate of the GeometryA1 and the last GeometryA2 to obtain the cut cultivated land entity data set.
The cutting result obtained by the method is shown in fig. 5, the outermost wire frame is the agricultural weight data, and the filling rectangle is the cut cultivated land entity data. The algorithm of the invention can ensure that the boundary of the cultivated land entity space data is not destroyed, refine the cultivated land entity data according to rights, ensure the data precision and improve the service capacity of the entity data.
Referring to fig. 6, fig. 6 is a schematic working diagram of a hardware device according to an embodiment of the present invention, where the hardware device specifically includes: a tilling land entity data cutting device 401, a processor 402 and a storage device 403.
Tilling entity data cutting apparatus 401: the tilling entity data cutting apparatus 401 implements the tilling entity data cutting method.
Processor 402: the processor 402 loads and executes the instructions and data in the storage device 403 for implementing the method for cutting data of a cultivated land entity.
Storage device 403: the storage device 403 stores instructions and data; the storage device 403 is configured to implement the method for cutting data of a cultivated land entity.
In combination, the invention has the beneficial effects that: under the condition of ensuring that the boundaries of the cultivated land entity data are not damaged, the cultivated land entity data refined and cut according to the agricultural rights data are realized, and the cultivated land entity data refined according to rights are obtained.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims (4)

1. A method for cutting farmland entity data is characterized in that: the method comprises the following steps:
s1: acquiring first GeometryB of tillable physical space data GeometryA and agro-weighted space data;
s2: obtaining a cutting line L according to the geometry B, and cutting the real space data geometry A of the cultivated land by using the cutting line L to obtain two cut data geometry A1 and geometry A2;
s3: replacing the geometry A with the geometry A2;
s4: reading the next geometry B of the agro-weighted spatial data, judging whether the next geometry B is the last geometry B, and if not, returning to the step S2; otherwise, entering step S5;
s5: outputting all the aggregate of the GeometryA1 and the last GeometryA2 to obtain the cut cultivated land entity data set.
2. The method for cutting the data of the cultivated land entity according to claim 1, wherein the method comprises the following steps: in step S2, the process of obtaining the cutting line L according to the geometry b is as follows:
s21, obtaining intersection of the Geometry A and the Geometry B to obtain Geometry C;
s22, deleting the vertexes of the GeometryC which are the same as those of GeometryA to obtain a point set { p } of the fold line D 1 ,p 2 ,...,p n }；
S23, let i=1;
s24, calculating the points p respectively i 、p i+1 Distance to all sides of the geometry A and find the minimum d of all distances mini And d mini+1 ；
S25, if d mini And d mini+1 All are smaller than the preset threshold r, the line segment p is not reserved i p i+1 The method comprises the steps of carrying out a first treatment on the surface of the If d mini And d mini+1 One or two of the segments are larger than or equal to a preset threshold r, and the segment p is reserved i p i+1 Point p i 、p i+1 Adding to the vertex set of polyline L;
s26, enabling i to be added with 1, judging whether i is equal to n or not, and if not, returning to the step S24; otherwise, take the first and last two vertexes P of the broken line L a And P b The method comprises the steps of carrying out a first treatment on the surface of the Judging P a Relationship with geometry a: if P a Outside the geometry A, take line segment P a P a+1 Intersection point O with GeomeryA replaces P a The method comprises the steps of carrying out a first treatment on the surface of the If P a Intersecting with GeomeryA, P is preserved a The method comprises the steps of carrying out a first treatment on the surface of the If P a Within the geometry A, the line segment P is lengthened a+1 P a Taking the intersection point O of the extension line and the geometry A, and adding the intersection point O to the coordinate string P a Front; judging P again b Relationship with geometry a: if P b Outside the geometry A, take line segment P b P b-1 Intersection point O with GeomeryA replaces P b The method comprises the steps of carrying out a first treatment on the surface of the If P b Intersecting with GeomeryA, P is preserved b The method comprises the steps of carrying out a first treatment on the surface of the If P b Within the geometry A, the line segment P is lengthened b-1 P b Taking the intersection point O of the extension line and the geometry A, and adding the intersection point O to the coordinate string P b Afterwards;
s27, collecting connecting lines of all points of the folding line L are used as cutting lines L.
3. A memory device, characterized by: the storage device stores instructions and data for implementing a method for cutting data of a cultivated land entity according to claim 1 or 2.
4. The utility model provides a cultivated land entity data cutting equipment which characterized in that: comprising the following steps: a processor and a storage device; the processor loads and executes the instructions and data in the storage device for implementing a method for cutting tillable land entity data according to claim 1 or 2.
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