Georeferenced Building Plan Generation via Coordinate Transformation
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Solution Overview
Problem
Existing navigation systems are inadequate for providing precise location and guidance within buildings or building complexes, as they lack detailed 2-dimensional or 3-dimensional plans that can be accurately georeferenced for indoor navigation.
Innovation Solution
A method and device for generating a georeferenced plan of a building or building complex by converting geodetic coordinates into corresponding Cartesian coordinates, allowing for the transformation of a reference image into a georeferenced plan, using a processing device to select and modify a zone selection window, and overlaying it with a building plan to create a georeferenced map.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a detailed 2-dimensional or 3-dimensional plan of a building structure is created, then navigation within buildings can be enabled, but accurately georeferencing points on the plan becomes technically complex
Solution Approach 1:
The patent introduces an intermediary zone selection window that serves as a mediator between the building plan and the reference image. This window allows users to define a selection area in the building plan, which is then automatically transformed and overlaid on the reference image, simplifying the georeferencing process by intermediate transformation steps
Solution Approach 2:
The patent segments the georeferencing process into distinct steps: defining a zone selection window, transforming coordinates, and overlaying the reference image. This segmentation allows each step to be handled independently, reducing overall complexity
2Measurement precision
If coordinate transformation between different projection spaces is performed, then accurate georeferenced plans can be generated, but the transformation process becomes computationally complex
Solution Approach 1:
The patent uses geodetic coordinates as an intermediary system between the building plan's local coordinate system and the reference image's projection space. This intermediate coordinate system simplifies the transformation process by providing a standardized reference framework
Solution Approach 2:
The patent transforms coordinates between different projection spaces by changing the parameter systems (Cartesian to geodetic to Cartesian). This parameter transformation approach maintains accuracy while managing computational complexity through systematic coordinate conversions
Data Source
AI summary
The invention concerns a method of generating a georeferenced plan of a building or building complex, the method involving: providing a georeferenced reference image of a map or aerial view of an area (101) comprising the building or building complex (102) in a first Cartesian projection space; converting, by a processing device, first coordinates of three or more points defining a zone selection window (404) in the reference image into three or more corresponding geodetic coordinates; converting, by the processing device, the three or more geodetic coordinates into second coordinates of the three or more points in a second Cartesian projection space to define a final zone in the second Cartesian projection space; and generating the georeferenced plan by transforming, by the processing device, the image zone of the reference image delimited by the zone selection window (404) to fill the final zone in the second Cartesian projection space.