US 11,940,529 B2
Updating contour maps for bodies of water
Sean Seifert, West Fargo, ND (US); and Mike Seifert, Bismarck, ND (US)
Assigned to Navico, Inc., Tulsa, OK (US)
Filed by Navico, Inc., Tulsa, OK (US)
Filed on Mar. 24, 2022, as Appl. No. 17/703,020.
Application 17/703,020 is a continuation of application No. 16/449,090, filed on Jun. 21, 2019, granted, now 11,340,349, issued on May 24, 2022.
Application 16/449,090 is a continuation of application No. 14/983,996, filed on Dec. 30, 2015, granted, now 10,371,816, issued on Aug. 6, 2019.
Prior Publication US 2022/0214453 A1, Jul. 7, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G01S 15/00 (2020.01); G01S 15/89 (2006.01)
CPC G01S 15/89 (2013.01) 20 Claims
OG exemplary drawing
 
1. A method for dynamically updating a contour map associated with a body of water, the contour map including water depth values of the body of water, the method comprising:
loading a pre-existing contour map of the body of water, the pre-existing contour map including a water depth value at a plurality of positions within the body of water and a plurality of contour lines;
causing display of the contour map on a display;
determining a location within the body of water;
determining, from the pre-existing contour map, a first water depth value at the determined location within the body of water;
determining, 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;
determining that there is a difference between the first water depth value and the second water depth value at the determined location; and
updating, 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.