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Best card for Lowrance Elite 7 Chirp

I have a new Lowrance Elite 7 Chirp with Navionics Gold but the detail is not very good. Today I received a new Legend Louisiana Geaux card which has incredible imagery but no depths shown. I note that Standard E-Cards don't seem to have depth either. Isn't there a way to get depths for bayous and bays to show on my Lowranace?

Maspping that shows water depths
~ Captain Paul's response to: ~ jcchev ~

As I said during our recent telephone conservation,
I don’t know of any of the available mapping for you unit that has the depth of the water other than those based on NOAA Marine Charts. However these charts usually do not have water depths listed in the internal Louisiana marshes. They normally show water depths of large lakes and those channels which are marked by Aids to Navigation markers.

As you said, it looks like you will have to input your sonar data as a waypoint on what ever program you settle on.

Please let me know what your final decision.

Captain Paul