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A Method for Uncertainty Evaluation of Multi-granularity Spatial Orientation Relationships Based on Rough Sets

A technology of spatial direction and uncertainty, applied in the field of geographic information

Active Publication Date: 2015-12-02
XINYANG NORMAL UNIVERSITY
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Problems solved by technology

Therefore, the introduction of rough set theory for approximate expression and evaluation of the uncertainty of multi-granularity spatial direction relations has operability and application space, but no relevant research has yet appeared

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  • A Method for Uncertainty Evaluation of Multi-granularity Spatial Orientation Relationships Based on Rough Sets
  • A Method for Uncertainty Evaluation of Multi-granularity Spatial Orientation Relationships Based on Rough Sets
  • A Method for Uncertainty Evaluation of Multi-granularity Spatial Orientation Relationships Based on Rough Sets

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Embodiment Construction

[0060] For the convenience of describing the technical solutions of the present invention, the theoretical basis involved in the embodiments of the present invention is provided as follows:

[0061] Uncertainty of spatial orientation relationship: The spatial orientation relationship is directly calculated through spatial data, and the spatial data used to calculate the spatial orientation relationship has position uncertainty. This uncertainty is calculated according to the error propagation law in the process of calculating the orientation relationship It will be propagated to the direction relationship, so that there is also uncertainty in the spatial direction relationship, that is, the uncertainty of the spatial direction relationship caused by the uncertainty of the location of the spatial data.

[0062] Rough set: Let R be a family of equivalence relations on the universe of discourse U, and U is divided into disjoint basic equivalence classes, binary pairs K=(U,R) const...

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Abstract

The invention discloses a coarse-set-based multi-granularity space direction relation uncertainty evaluation method which defines coarse set expressions of multi-granularity space direction relations of a source target respectively in the condition that the source target is point, line and plane and further defines knowledge-(direction relation)-based roughness and approximate precision to evaluate the multi-granularity space direction relation uncertainty from the aspect of space direction relation uncertainty, based on advantages of the coarse set in disclosing and expressing multi-layer (or granularity) space knowledge and relation established between the space direction and the coarse set by adequately analyzing the space direction relation according to influence of uncertainty of source target position on space direction relation uncertainty. An effective evaluation method is provided for evaluation of multi-granularity space direction relation uncertainty.

Description

technical field [0001] The invention belongs to the technical field of geographic information, in particular to a method for evaluating the uncertainty of multi-granularity spatial direction relations based on rough sets. Background technique [0002] Like spatial distance and spatial topological relationship, spatial direction relationship is an important theoretical issue of GIS (Geographic Information System). It plays an important role in the process of spatial data modeling, spatial query, spatial analysis, spatial reasoning, cartographic synthesis, and map interpretation of geographic information systems. Scholars at home and abroad have conducted a lot of research on the spatial orientation relationship, such as the expression model of the spatial orientation relationship of precise data, the expression model of the spatial orientation relationship of fuzzy spatial objects (uncertain geographical objects), and the multi-scale spatial data simplification uncertainty. ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 徐丰牛继强
Owner XINYANG NORMAL UNIVERSITY