The new basemap upgrade will add 10,000 lakes to the 3000 lakes already included in the Contour XD basemap ...
I'm hearing it's 10-20ft contours ... But that's still better than no contours at all (if your lake is now included in the extra 10,000 lakes added to Contour XD and you don't want to buy a map card with 1ft contours) ...
If one is already using a mapping card with 1ft contour - there is no value in the upgrade ...
Rickie