Patent ID: 11940529
Assignee: NAVICO, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 18:
19. A method for providing a dynamically updated contour map associated with a body of water, the contour map including water depth values of the body of water and a plurality of contour lines, the method comprising:
causing display of a first contour map on a display;
determining a location within the body of water;
determining, from data corresponding to the first contour map, a first water depth value at the determined location within the body of water;
determining, from at least two of a global position system (GPS) altitude signal, a sonar system, an online database that provides periodic updates regarding the water depth values of the body of water, or tide levels, a second water depth value at the determined location within the body of water;
determining that there is a difference between the first water depth value and the second water depth value at the determined location; and
providing, on the display and based on the difference, a second contour map for the body of water to indicate the difference at the determined location where the first water depth value is replaced by the second water depth value at the determined location while the plurality of contour lines are maintained.