2D Road Junction Boundary Estimation From Map Geometry

The patent introduces an intermediary approach by using road map data and geometric relationships as intermediaries between satellite imagery and the final measurement. Instead of directly analyzing complex satellite imagery, the system uses the road map as an intermediate representation that already contains simplified geometric information about roads and junctions, thereby reducing computational complexity while maintaining measurement accuracy.

The patent creates a simplified copy or representation of the real-world road junction geometry within the road map data structure. This digital copy captures the essential geometric characteristics (size and shape) without requiring processing of the full complexity of satellite imagery, enabling efficient computation while preserving measurement precision.

The system enables self-service processing where the road map data structure itself provides the geometric information needed for junction analysis. The road map automatically contains the necessary geometric relationships and boundary definitions, eliminating the need for time-consuming human parsing of satellite imagery while maintaining accurate measurement of junction sizes and shapes.

The patent performs preliminary action by pre-processing and organizing road geometric data within the road map structure before actual analysis is needed. The road map is pre-configured with geometric relationships, road segments, and junction definitions, so that when analysis is required, the data is already prepared and readily available, eliminating time-consuming on-demand parsing.