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

Claim 9:
10. A system comprising:
at least one processor;
a display;
a database storing a pre-existing contour map for a body of water, wherein the pre-existing contour map includes water depth values for the body of water and a plurality of contour lines; and
a memory operatively connected to the at least one processor, the memory comprising computer executable instructions that, when executed by the at least one processor, cause the processor to:
load the pre-existing contour map of the body of water;
cause display of the pre-existing contour map on a display;
determine a location within the body of water;
determine, from the pre-existing contour map, a first water depth value at the determined location within the body of water;
determine, from at least one of a global position system (GPS) altitude signal, 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;
determine that there is a difference between the first water depth value and the second water depth value at the determined location; and
update, on the display and based on the difference, the contour map for the body of water to indicate the difference at the determined location by replacing the first water depth value with the second water depth value at the determined location while maintaining the plurality of contour lines.