System and method for updating map data in a map database

Patent metadata

Field	Value
Publication number	US-2020372012-A1
Application number	US-201916419837-A
Country	US
Kind code	A1
Filing date	May 22, 2019
Priority date	May 22, 2019
Publication date	Nov 26, 2020
Grant date	—

Abstract

A method, a system, and a computer program product may be provided for updating map data in a map database to indicate presence of a road sign. The method may include obtaining first sensor data associated with a road sign. The first sensor data may comprise at least one of one or more first positive observations of a road sign or one or more first negative observations of the road sign. The method may further include obtaining second sensor data for the road sign, for example, based on the first sensor data. The second sensor data may comprise cumulative historic road sign observation data for time duration. The method may include determining a sign confidence ratio based on the first sensor data and the second sensor data. The method may include updating the map data based on the sign confidence ratio.

First claim

We claim:

1 . A system for updating map data, comprising:
at least one non-transitory memory configured to store computer program code instructions; and at least one processor configured to execute the computer program code instructions to:
obtain first sensor data associated with a road sign, wherein the first sensor data comprises at least one of one or more first positive observations of a road sign or one or more first negative observations of the road sign;
obtain second sensor data for the road sign, based on the first sensor data, wherein the second sensor data comprise cumulative historic road sign observation data for a time duration;
determine a sign confidence ratio based on the first sensor data and the second sensor data; and
update the map data based on the sign confidence ratio.

2 . The system of claim 1 , wherein the at least one processor is further configured to update the map data to indicate absence of the road sign based on the sign confidence ratio being less than a threshold value.

3 . The system of claim 1 , wherein the at least one processor is further configured to update the map data to indicate presence of the road sign, based on the sign confidence ratio being greater than or equal to a threshold value.

4 . The system of claim 1 , wherein each of the one or more first positive observations comprises time of capture of the road sign and location associated with the capture of the road sign.

5 . The system of claim 1 , wherein the one or more first negative observations indicate no capture of the road sign.

6 . The system of claim 1 , wherein the at least one processor is configured to transmit a notification corresponding to the updated map data to at least one mobile device.

7 . The system of claim 1 , wherein the second sensor data comprises at least one of one or more second positive observations or one or more second negative observations.

8 . The system of claim 7 , wherein the sign confidence ratio is determined as:
SCR=(( N pos +N pos cumulative )/ N pos +N pos cumulative +N neg +N neg cumulative )), wherein SCR indicates the sign confidence ratio, wherein N pos indicates a count of the one or more first positive observations, wherein N pos cumulative indicates a count of the one or more second positive observations, wherein N neg indicates a count of the one or more first negative observations, and wherein N neg cumulative indicates a count of the one or more second negative observations.

9 . A method for updating map data, comprising:
obtaining first sensor data associated with a road sign, wherein the first sensor data comprises at least one of one or more first positive observations of a road sign or one or more first negative observations of the road sign; obtaining second sensor data for the road sign, wherein the second sensor data comprise cumulative historic road sign observation data for a time duration; determining, by one or more processors, a sign confidence ratio based on the first sensor data and the second sensor data; and updating the map data based on the sign confidence ratio.

10 . The method of claim 9 , further comprising updating the map data to indicate absence of the road sign, based on the sign confidence ratio being less than a threshold value.

11 . The method of claim 9 , further comprising updating the map data to indicate presence of the road sign, based on the sign confidence ratio being greater than or equal to a threshold value.

12 . The method of claim 9 , wherein each of the one or more first positive observations comprises time of capture of the road sign and location associated with the capture of the road sign.

13 . The method of claim 9 , wherein the one or more first negative observations indicate no capture of the road sign.

14 . The method of claim 9 , further comprising transmitting a notification corresponding to the updated map data to at least one mobile device.

15 . The method of claim 9 , wherein the second sensor data comprises at least one of one or more second positive observations or one or more second negative observations.

16 . The method of claim 15 , wherein the sign confidence ratio is determined as:
SCR=(( N pos +N pos cumulative )/ N pos +N pos cumulative +N neg +N neg cumulative )), wherein SCR indicates the sign confidence ratio, wherein N pos indicates a count of the one or more first positive observations, wherein N pos cumulative indicates a count of the one or more second positive observations, wherein N neg indicates a count of the one or more first negative observations, and wherein N neg cumulative indicates a count of the one or more second negative observations.

17 . A computer programmable product comprising a non-transitory computer readable medium having stored thereon computer executable instructions, which when executed by one or more processors, cause the one or more processors to carry out operations for updating map data, the operations comprising:
obtaining first sensor data associated with a road sign, wherein the first sensor data comprises at least one of one or more first positive observations of a road sign or one or more first negative observations of the road sign; obtaining second sensor data for the road sign, based on a count of the at least one of the one or more first positive observations or the one or more first negative observations is less than a threshold value, wherein the second sensor data comprise cumulative historic road sign observation data for a time duration; determining a sign confidence ratio based on the first sensor data and the second sensor data; and updating the map data based on the sign confidence ratio.

18 . The computer program product of claim 17 , wherein the operations further comprise updating the map data to indicate absence of the road sign based on the sign confidence ratio being less than a threshold value.

19 . The computer program product of claim 17 , wherein the operations further comprise updating the map data to indicate presence of the road sign, based on the sign confidence ratio being greater than or equal to a threshold value.

20 . The computer program product of claim 17 ,
wherein the second sensor data comprises at least one of one or more second positive observations or one or more second negative observations, and wherein the sign confidence ratio is determined as:
SCR=(( N pos +N pos cumulative )/ N pos +N pos cumulative +N neg +N neg cumulative )),
wherein SCR indicates the sign confidence ratio, wherein N pos indicates a count of the one or more first positive observations, wherein N pos cumulative indicates a count of the one or more second positive observations, wherein N neg indicates a count of the one or more first negative observations, and wherein N neg cumulative indicates a count of the one or more second negative observations.

Assignees

• Here Global Bv

Inventors

• Averbuch Alex
• Stenneth Leon

Classifications

• G06F16/29 Primary

  Geographical information databases · CPC title

• G06F16/2379 Primary

  Updates performed during online database operations; commit processing · CPC title

• G06F16/2365

  Ensuring data consistency and integrity · CPC title