The contour lines and creek channels will come from mapping cards or maps that you make. These are not built-in features.

You really need to decide on what sonar capabilities you need for each unit because that will help determine the unit models to look at. Humminbird offers units that have 2D (conventional) only sonar, 2D + Down Imaging sonar, and 2D + Di + Side Imaging sonar.

If the unit will display maps, it will be able to mark waypoints. Only certain series of our units can share waypoint data through an Ethernet connection, so you are looking at the 800 or larger series of units for this.

Some models to look at:
859ci HD
859ci HD DI
899ci HD Si