HD Map Format Conversion for Software Compatibility
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Solution Overview
Problem
High Definition (HD) maps used in autonomous vehicles become outdated due to changes in road infrastructure, and their proprietary format limits compatibility with various software applications and online services, making integration and real-time updates challenging.
Innovation Solution
The system converts proprietary HD map data into a standard geospatial format, generating vector tiles that can be selectively provided based on the characteristics of requesting software applications or services, enabling on-the-fly generation and real-time updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If proprietary HD map data format is used, then map data can be maintained with high detail and accuracy, but compatibility with various software applications and online services is limited
Solution Approach 1:
The patent introduces a format conversion system that acts as an intermediary between the proprietary HD map data format and standard geospatial formats. This converter translates map data between formats without losing essential information, enabling both high-accuracy proprietary format storage and broad compatibility through standard format output. The conversion process preserves geometric accuracy while making data accessible to diverse applications and services.
2Reliability
If complete HD map updates are provided frequently, then map data remains current with road infrastructure changes, but data transmission and processing time increases
Solution Approach 1:
The patent extracts and transmits only the changed portions of map data rather than complete updates. The system identifies specific geometric changes (road additions, modifications, deletions) and transmits only these differential updates in standard format. This extraction approach maintains map currency by delivering timely updates while significantly reducing data transmission time and bandwidth requirements compared to full map redistributions.
3Adaptability or versatility
If HD map data is converted to standard format on-demand, then compatibility with requesting applications is improved, but processing time for conversion increases
Solution Approach 1:
The patent implements preliminary conversion by pre-processing HD map data into standard geospatial format and storing it alongside the proprietary format. When applications request map data, the system can immediately provide pre-converted standard format data without performing conversion on-demand. This preliminary action eliminates conversion delays while maintaining both format types for their respective use cases, thus improving application compatibility without sacrificing response time.
Data Source
AI summary
Disclosed herein are systems, methods, and computer program products for providing an electronic map. The methods comprise: identifying at least one first data object that was changed during a last update of the electronic map; creating at least one geometry artifact by converting a format of data associated with the at least one first data object from a first data format to a different second data format (wherein the geometry artifact comprises 2D grid coordinates for a point, a line or a polygon); using the geometry artifact to generate first vector tile(s) in the different second data format; and selectively providing the first map in the first data format or the first vector tile(s) in the second data format based on characteristics of a software application or online service requesting access to contents of the electronic map.