US Patent 10151829 Systems and associated methods for producing sonar image overlay

Overlaying a sonar image over a chart at a corresponding location can provide a beneficial and easy to understand view of the underwater environment for a user. However, in some cases, the watercraft may be close to a boundary of the body of water when the sonar data is gathered. In such a scenario, inaccurate sonar returns or preset display distances of the sonar image can cause the resulting sonar image to be displayed over the boundary and covering land. This can be confusing and can be difficult to decipher. Embodiments of the present invention provide systems and methods for cropping the sonar image for presentation over the chart such that no portion of the image extends beyond the boundary line of the body of water. This creates a smooth and easy to read sonar image/chart display.