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Category: one foot contours

How to use multiple C-MAP Genesis charts on your sonar/GPS unit

2-maps-on-same-unit-2-panel-collageDid you know you can use multiple C-MAP Genesis charts on the same SD card or mini-SD card? This functionality is available for charts downloaded for free from Social Map and for custom maps that Genesis Edge subscribers create with sonar recordings made with their own Lowrance depthfinders.

“We/ve made C-MAP Genesis maps as easy to use as possible,” says C-MAP’s Greg Konig. “We know keeping track of multiple SD cards can be difficult, as they are easily misplaced and lost. This advancement allows anglers, cruisers and sailors to keep their C-MAP Genesis custom maps conveniently stored on the same card, for easy use on the water.”  

microsd-cardPreviously, only one C-MAP Genesis map could be saved on an SD card for use on the water. Note, however, that multiple maps won’t all display at the same time on your GPS/sonar unit, but they will be easily accessible via the “Chart Options” window in your sonar units’ Chart page. This is a feature for HDS Gen2, Gen3 and Carbon units only, at this time.

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Pro tip: Map all the spots you graph in tournament practice

When you graph potential hot spots in practice for a fishing tournament, you should also map them and waypoint every fish you catch and/or shake-off. Overlaying your waypoints on the C-MAP Genesis bottom-hardness and vegetation layers will help clue you in on a productive pattern and allow you to run that pattern faster and more precisely.


C-MAP Genesis (formerly know as Insight Genesis) is an innovative software service that anglers use to make custom one-foot contour maps of un-mapped bodies of water, improve contour detail on previously mapped waters, and to find fish-holding bottom structure not charted on off-the shelf maps, including reefs and shoals, sunken islands and holes, humps and hard-bottom areas, drains and ditches. 

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How to create and use a C-MAP Genesis bottom-hardness map layer to catch more and bigger fish

Many fisherman “beat the bank” because they have more confidence targeting visible cover. But the fish in those areas get pounded, making them harder to catch. With an C-MAP Genesis (formerly known as Insight Genesis) bottom-hardness map layer, however, you can fish the bottom as confidently as you do the bank, targeting offshore structure like hard-to-soft-bottom transitions and the fish-holding sweet spots on humps, reefs, and shoals, etc. This article will teach you how.

Although it’s a great fish-finding tool, side-looking sonar alone can’t really show you the size and shape of hard-bottom areas like gravel patches, clay slicks and shellbeds. But the C-MAP Genesis bottom-hardness layer can, making such areas stick out like “Fish Here!” signs on your map. It overlays onto your contour lines a color-coded representation* of the size, shape and location of areas of different bottom hardness: dark orange areas show the hardest bottom; a lighter orange indicates the next-hardest bottom; tan is the next-hardest bottom; and pale yellow shows the softest-bottom areas.

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C-MAP Creates custom Genesis Edge map for Soner Euro Nitro Cup 2016


To help anglers catch more and bigger fish in the Soner Euro Nitro Cup 2016, tournament sponsor C-MAP used its innovative C-MAP Genesis marine-mapping service to create the most detailed contour map ever seen of the tournament venue, 6,332-hectare Embalse de Cijara, in Spain.

American Lowrance Pro Casey Ashley, 2015 Bassmaster Classic Champion

The Soner Euro Nitro Cup is Europe’s most important black bass tournament. All the best European anglers will be there to compete for the grand prize, a Tracker boat. And for the first time in the tournament’s history, a top American bass pro, 2015 Bassmaster Classic Winner Casey Ashley, will compete against Europe’s best.

Like other anglers in the tournament, Ashley will be aided in finding and catching more and bigger fish by studying the one-foot contours on the Insight Genesis fishing maps loaded in his Lowrance HDS Gen3 units. The C-MAP Genesis system helps anglers find fish fast by offering them free downloads of community-sourced contour charts from Social Map, enabling them to create their own custom contour maps of un-mapped bodies of water, and helping them discover and dissect potential tournament-winning spots that don’t appear on store-bought marine maps.

Cijara features steep drop-offs, holes, shallow flats and sunken islands/humps, saddles and points – just the kind of hidden fish-holding structure Insight Genesis excels at uncovering.


French GoFree/Lowrance Pro-Staffer Kevin Hernandez

“It says a lot about commitment to the Soner Euro Nitro cup 2016 to devote time and resources to guarantee that our competitors get the best possible fishing map,” says Maria Jesus Chus Picaza, organizer of the Soner Euro Nitro cup 2016. “With such a highly detailed C-MAP Genesis contour map, no matter where in the world our anglers come from, they’ll be able to fish Cijara with the confidence of a local.”

To create such a high-definition C-MAP Genesis map of Cijara for the Soner Euro Nitro Cup 2016, C-MAP enlisted Genesis and Lowrance pro-staffers Raul Castellano and Stéphane Langlais, who used the Lowrance HDS units on their boats to record sonar logs of the soundings they made across the entire lake. The sonar data from multiple trips they made on the water was aggregated into a high-definition fishing map, complete with one-foot, blue-scaled depth contours. Light blue indicates shallower water; dark blue, deeper water.

Spanish GoFree/Lowrance Pro-Staffer Raul Castellano

Cijara features steep drop-offs, holes, shallow flats and sunken islands/humps, saddles and points – just the kind of hidden fish-holding structure Insight Genesis excels at uncovering. Not only do Genesis maps show you where such areas are located – so you can speed directly to them, rather than slowly idling around searching for them – they also show your boat’s position on the map in relation to them, making it easy to make repeated, pinpoint casts to the strike zone.

Soner Euro Nitro Cup competitors who want to use the Genesis map in the tournament can download it for free* from Social Map at this link. The Cijara map and many, many more are available for free download not just for anglers fishing in the Soner Euro Nitro cup, but also for anyone who opens a free Genesis account. A free account provides access to thousands of free, high-definition contour maps of lakes close to home, across the country and around the world. Sign up for a free account here:

* Registration for a free Genesis account required prior to free download of map files


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