Welcome to the Unofficial Humminbird Forums love2fish.
You can ask Matt from ReefMaster about his software but I think all it does is use a Trackline as a depth contour line. He has a separate folder on another board:
The DR. Depth software was bought by Johnson Outdoors, Inc. which is the parent conmpany of Humminbird. The AutoChart software from Humminbird can be used to make an actual lake map.