Method for determining drawing data of map element, electronic device, and non- transitory computer-readable storage medium

Patent metadata

Field	Value
Publication number	US-12387396-B2
Application number	US-202218077032-A
Country	US
Kind code	B2
Filing date	Dec 7, 2022
Priority date	Dec 8, 2021
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

Provided are a method for determining drawing data of a map element, an electronic device, and a non-transitory computer-readable storage medium. The specific implementation scheme includes determining a reference point position of a non-link element according to a relationship between the non-link element and adjacent link elements in an electronic map and based on lane edge positions of the adjacent link elements; determining a direction of the non-link element according to the relationship between the non-link element and the adjacent link elements; and determining drawing data of the non-link element according to the reference point position and the direction of the non-link element, where the drawing data is used for drawing and rendering an image of the non-link element in a link when the drawing data is loaded by a map interface.

First claim

What is claimed is:

1. A method for determining drawing data of a map element, comprising:
determining a reference point position of a non-link element according to a relationship between the non-link element and adjacent link elements in an electronic map and based on lane edge positions of the adjacent link elements;
determining a direction of the non-link element according to the relationship between the non-link element and the adjacent link elements; and
determining drawing data of the non-link element according to the reference point position and the direction of the non-link element, wherein the drawing data is used for drawing and rendering an image of the non-link element in a link when the drawing data is loaded by a map interface;
wherein the reference point position of the non-link element is on a lane edge on either side of the link or at a center of lane edges on two sides of the link; the direction of the non-link element is related to the link and is used to enable a user to see an effect matching a direction of the link from the electronic map; and the direction of the non-link element is same with the direction of the link or at a set angle with the direction of the link.

2. The method of claim 1 , further comprising:
determining text contents of the non-link element according to attribute contents of the non-link element in electronic map data and determining the text contents as the drawing data of the non-link element.

3. The method of claim 1 , wherein in a case where the non-link element is a direction sign, determining the reference point position of the non-link element according to the relationship between the non-link element and the adjacent link elements in the electronic map and based on the lane edge positions of the adjacent link elements comprises:
in a case where it is determined that a link element adjacent to the direction sign is a single-direction link comprising one downstream link element according to a relationship between the direction sign and the adjacent link elements, acquiring an upstream side lane edge of an upstream link element adjacent to the direction sign from the electronic map; and
drawing a perpendicular line from an original point position of the direction sign in the electronic map to the upstream side lane edge, and using an intersection of the perpendicular line and the upstream side lane edge as a reference point position of the direction sign.

4. The method of claim 2 , wherein in a case where the non-link element is a direction sign, determining the reference point position of the non-link element according to the relationship between the non-link element and the adjacent link elements in the electronic map and based on the lane edge positions of the adjacent link elements comprises:
in a case where it is determined that a link element adjacent to the direction sign is a single-direction link comprising one downstream link element according to a relationship between the direction sign and the adjacent link elements, acquiring an upstream side lane edge of an upstream link element adjacent to the direction sign from the electronic map; and
drawing a perpendicular line from an original point position of the direction sign in the electronic map to the upstream side lane edge, and using an intersection of the perpendicular line and the upstream side lane edge as a reference point position of the direction sign.

5. The method of claim 1 , wherein in a case where the non-link element is a direction sign, determining the reference point position of the non-link element according to the relationship between the non-link element and the adjacent link elements in the electronic map and based on the lane edge positions of the adjacent link elements comprises:
in a case where it is determined that a link element adjacent to the direction sign is a multi-direction link comprising a plurality of downstream link elements according to a relationship between the direction sign and the adjacent link elements, combining direction signs corresponding to the plurality of downstream link elements into one drawing object;
in a case where it is determined that one link element of the plurality of downstream link elements is a ramp and a link element adjacent to the one link element is a main link according to link levels of the plurality of downstream link elements, acquiring a lane edge of the ramp closer to the main link from the electronic map; and
in a case where it is determined that the lane edge is a non-diversion line, using a starting point of the lane edge as a reference point position of the direction sign.

6. The method of claim 2 , wherein in a case where the non-link element is a direction sign, determining the reference point position of the non-link element according to the relationship between the non-link element and the adjacent link elements in the electronic map and based on the lane edge positions of the adjacent link elements comprises:
in a case where it is determined that a link element adjacent to the direction sign is a multi-direction link comprising a plurality of downstream link elements according to a relationship between the direction sign and the adjacent link elements, combining direction signs corresponding to the plurality of downstream link elements into one drawing object;
in a case where it is determined that one link element of the plurality of downstream link elements is a ramp and a link element adjacent to the one link element is a main link according to link levels of the plurality of downstream link elements, acquiring a lane edge of the ramp closer to the main link from the electronic map; and
in a case where it is determined that the lane edge is a non-diversion line, using a starting point of the lane edge as a reference point position of the direction sign.

7. The method of claim 5 , after acquiring the lane edge of the ramp closer to the main link from the electronic map, further comprising:
in a case where it is determined that the lane edge is a diversion line, acquiring a lane edge of the main link closer to the ramp as a main link lane edge, wherein the lane edge of the ramp closer to the main link is used as a ramp lane edge; and
determining a midpoint of a fitting curve between an end point of the main link lane edge and an end point of the ramp lane edge as the reference point position of the direction sign.

8. The method of claim 1 , wherein in a case where the non-link element is a direction sign, determining the direction of the non-link element according to the relationship between the non-link element and the adjacent link elements comprises:
determining, according to a direction of an upstream link element adjacent to the direction sign, that a direction of the direction sign is perpendicular to the direction of the upstream link element.

9. The method of claim 2 , wherein in a case where the non-link element is a direction sign, determining the direction of the non-link element according to the relationship between the non-link element and the adjacent link elements comprises:
determining, according to a direction of an upstream link element adjacent to the direction sign, that a direction of the direction sign is perpendicular to the direction of the upstream link element.

10. The method of claim 8 , after determining that the direction of the direction sign is perpendicular to the direction of the upstream link element, further comprising:
in a case where a link element adjacent to the direction sign is a single-direction link comprising one downstream link element, determining that a sign plane of the direction sign points to a lane boundary line on another side of the one downstream link element f

Assignees

• Beijing Baidu Netcom Sci & Tech Co Ltd

Inventors

• Sheng Changjun
• Kong Xiangxiao
• Tong Juntao
• Zeng Yi

Classifications

• G06T11/23 Primary

  using straight lines or curves · CPC title

• G06T11/10

  Texturing; Colouring; Generation of textures or colours (retouching, inpainting or scratch removal G06T5/77) · CPC title

• G06T11/26 Primary

  Drawing of charts or graphs · CPC title

• G06F16/29

  Geographical information databases · CPC title

• G06T11/203 Primary

  Physics · mapped topic