HD 1 - and 3-ft. incredibly accurate digital contour maps ProMap Series data cards for Lowarance GPS with Lowarance format. Plug-and-play format only. Micro SD card with SD adapter will work with HDS, LCX, LMX, GloablMap and Endura. Specify region: Iowa/Illinois/Missouri, Lake of the Woods/Rain, Dakotas/Nebraska, Minnesota, Wisconsin,Michigan,Texas/Oklahoma.
I got the Dakotas/Nebraska map for The H2Oc Lowrance. The lake I got it for is off by 2 - 3 ft. almost everywhere. Some areas too deep and some too shallow. There's places the shoreline is not accurate. Areas where there is structure under neath, doesn't show up. I will try a different map company next time.
These map chips are awesome! I have done a great deal of exploring on MN lakes this winter and the depth data is 99% accurate. This cuts my hole drilling by more than 50%. I would feel lost without this information now that I have gotten used to using it.
This card ( for Michigan )will not work in a LMS 520C & LCX 27. I bought one and put in my units and it did not work. Call Lakemaster and sent it in, Bottom line at this time they do not have a fix. 5-17-11. They were very helpfull and are working on the proplem. Rick