Thread: Lakemaster HD lakes

When I bought Lakemaster southeast v3 I looked at the the list of lakes on version 3 and Grenada and some other lakes were denoted as new HD surveys done by lakemaster. Does this mean the other lakes were upgraded to HD from surveys already done? Are there any noticeable differences in the two. Kinda wondered if it's like colorizing an old black and white movie. Specifically wondering if they surveyed Barnett or used someone elses maps.