How Do Fish Finders Map Contours?
Using a fish finder’s depth-shading capabilities, you can quickly identify areas of productive water and avoid those that don’t. Whether you’re fishing in a deep lake or a small stream, depth shading will help you focus on the water that is most productive for you. It can also help you identify similar areas on the map. how to read humminbird fish finders
The best way to determine which contours your fish finder can map is by comparing the sonar logs with maps and interpolation models. This process is much more accurate than simply drawing contour lines with a crayon on a koozie. However, if you’re not able to get a high-quality sonar log, it’s unlikely that the contours you see will be accurate.
Modern cartography of waterways typically includes 3D data and algorithms to create contiguous lines. These depth contour lines are superimposed on the displayed maps to give the user an idea of where the bottom of the waterway is. Fish finders that use sonar depth finders may also include algorithms that enable them to identify contour lines.
Customizing maps on chartplotters and sonar systems is easy and free. Many boaters power up their sonar/chartplotter combo and glance at the clear, crisp color screen. They see little detail and aren’t able to clearly identify fish soundings.
The Lowrance Hook Reveal is available in three models and the difference is primarily the screen size. Each model offers some impressive features, such as GPS mapping and one-foot contours of 5,000 lakes, including 9,400 lakes in Canada. These fish finders can also use an optional SD card to store more information.