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Architectural CAD drawing-based indoor topological map generating method and system

A topology map and generation system technology, applied in the field of indoor positioning and navigation, can solve problems such as differences in expression and redundancy, and achieve the effects of short running time, high extraction accuracy, and low algorithm complexity

Active Publication Date: 2018-09-14
金华航大北斗应用技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most CAD files have errors and redundancy when drawing, and there are differences in expression from the actual map. Therefore, it is necessary to preprocess the original data, correct errors and reduce the data scale, and obtain indoor basic data correctly.

Method used

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  • Architectural CAD drawing-based indoor topological map generating method and system
  • Architectural CAD drawing-based indoor topological map generating method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Embodiment 1, a kind of indoor topological map generation system based on building CAD drawing, refer to figure 1 As shown, includes reading module, processing module, extraction module and analysis module. The reading module reads the CAD DXF file to obtain the original CAD data such as geometric line segments, arcs and blocks representing the internal structure of the building (walls, doors, windows, etc.) in the target positioning area. The processing module gives the definition of describing the relationship between geometric objects in an error-allowed way, and uses the above-mentioned relationship to remove and repair the redundancy and error existing in the original CAD data, and obtain the processed CAD data. The extraction module analyzes and processes the processed CAD data, and sequentially extracts indoor basic data such as doorsteps and walls that meet the requirements of the indoor map, and extracts indoor space units such as rooms and corridors based on ...

Embodiment 2

[0053] Embodiment 2, a method for generating indoor topological maps based on architectural CAD drawings for reference figure 2 As shown, the specific steps of the algorithm implementation are as follows:

[0054] (1) CAD reading

[0055] Select the architectural CAD plan (DXF format) of the target positioning area, and analyze all the parts in the architectural CAD plan according to the multi-segment structure of the DXF file (HEARDER segment, CLASSES segment, TABLES segment, BLOCKS segment, ENTITIES segment, OBJECTS segment and THUMBNAILIMAGE segment, etc.). Data, including geometric line segments, arcs, and blocks representing walls, doors, and walls, etc., and layers used to distinguish and organize different spatial elements.

[0056] (2) Pretreatment

[0057] Because CAD files often have errors, redundancy, and differences in expression when drawing, it is necessary to correct and simplify the original data, that is, to adopt an error-tolerant method for data preproce...

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Abstract

The invention discloses an architectural CAD drawing-based indoor topological map generating method and an architectural CAD drawing-based indoor topological map generating system. Spatial units are extracted based on indoor basic data, and on such basis, the spatial units are topologically analyzed to obtain a topological relationship of the indoor spatial units and finally generate a topologicalmap. An architectural CAD plane drawing is used for achieving automatic generation of the indoor topological map, so that the construction cost of an indoor map is greatly reduced; in addition, the accurate rate for indoor space unit extraction is high, the algorithm complexity is low and the running time is short.

Description

technical field [0001] The invention relates to indoor positioning and navigation technology. Background technique [0002] Indoor positioning and navigation are the basis for realizing ubiquitous computing and providing location-based services. In recent years, indoor positioning technology has made significant progress, but any positioning system needs to be accompanied by a corresponding map to display positioning results and provide further location services. Indoor maps are geographic information datasets that represent the internal structure of buildings, points of interest, and passing paths. They can cooperate with indoor positioning technology to display positioning results and provide navigation services. Unlike the large-scale commercial maps of urban road network space such as Google Maps and AutoNavi Maps in outdoor spaces, there is still a lack of large-scale indoor space maps in indoor spaces. At present, the construction of indoor maps mostly relies on manu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F2111/20G06F30/13
Inventor 不公告发明人
Owner 金华航大北斗应用技术有限公司