A Method for Automatically Generating Ground Object Maps Based on Artificial Ground Object Features
A technology of ground features and ground features, applied in 2D image generation, image data processing, instruments, etc., can solve problems such as low efficiency, inconvenient operation, lack of intelligence and flexibility, etc., to achieve high efficiency and improve The level of intelligence and the effect of promoting applications
Inactive Publication Date: 2015-11-18
SOUTHEAST UNIV
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Problems solved by technology
[0004] Since the polygons of ground objects are mostly concave polygons, mathematically concave polygons cannot be uniquely generated by their random shape points
Limited by this, most mobile GIS for land survey do not have the function of automatic mapping of concave polygonal objects at present
Moreover, there are some defects in the method of constructing map spots by using the traditional method of collecting points sequentially. For example, the composition process has a strict dependence on the timing of point collection, and there are problems of inconvenient operation and low efficiency, which restrict the work efficiency of land surveys. Intelligence and flexibility
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[0023] The present invention will be further described below in conjunction with the accompanying drawings.
[0024] Such as figure 1 As shown, a method for automatic generation of feature maps based on artificial feature features includes the following steps:
[0025] (1) First input the point sequence L={V 1 ,V 2 ,···,V n}, using the greedy selection method to generate the initial polygon with the target polygon side length and minimum as constraints;
[0026] (1.1) The specific steps of the greedy selection method to generate the initial polygon include: (a) Randomly select a point V in L i , calculated with V i The point V with the smallest distance i+1 , the V i and V i+1 sequentially added to the result list R, and V i and V i+1 Deleted from L; (b) find out and V in L respectively i and V i+1 nearest point V i-1 and V i+2 , and judge: if V i-1 V i i+1 V i+2 , then V i+2 delete from L and insert at the end of R; if V i-1 V i >V i+1 V i+2 , then V i-...
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The invention discloses a ground object pattern spot automatic generation method based on artificial ground object characteristics. Firstly, a disorder shape point sequence is input, and an initial polygonoun with points of the disorder shape point sequence as top ends is automatically generated through point sequence processing. Then, whether an self-intersection phenomenon of the polygonoun exists is searched. If the self-intersection phenomenon of the polygonoun exists, the self-intersection phenomenon of the polygonoun is eliminated and a simple polygonoun is generated. The simple polygonoun is processes according to pattern spot characteristics of ground objects, so that the generated simple polygonoun is provided with geometrical characteristics of the artificial ground object pattern spots. The ground object pattern spot automatic generation method provided by the invention solve the technical problems that conventional methods are heavily dependent on point collecting sequences, are short of flexibility, intelligence, and concave polygon ground object automatic pattern generating function, and the conventional methods can not be applied to a multi-user cooperative working module or a single-user random point collecting module.
Description
technical field [0001] The invention discloses a data processing method in land management, and in particular relates to a method for automatically generating feature map spots based on artificial feature features, in particular, in land survey, using measuring equipment to collect the disordered shapes of feature polygons Point sequences, and the method of automatically constructing patterns through these point sequences. Background technique [0002] In the field of land and resources, single-type land parcels, and single-type land parcels divided by administrative boundaries, land ownership boundaries or linear features are called map spots. The objects corresponding to the spots in the electronic map can be divided into three categories: natural objects, artificial features and others, such as administrative boundaries. The pattern discussed in this method refers to the pattern of artificial ground features. The geometric characteristics of artificial ground features ha...
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IPC IPC(8): G06T11/00
Inventor 王慧青王庆江文娜张小国
Owner SOUTHEAST UNIV
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