LakeMaster has many more high definition surveys of Wisconsin lakes than Navionics and a few more on the Minnesota chip. LakeMaster hasn’t surveyed in Iowa. There is very little difference in the maps for the large lakes in Minnesota. LakeMaster has the only high definition survey of Winnebago and Green bay. I suggest you ask for a sample picture of the lakes you want to fish from each company. You can then make a better decision. They can email them if you have high speed internet. Buying map chips is difficult because the map data isn’t the same for each lake and there is no easy way to tell unless you own both chips and use them on the lake you are fishing. I use both Navionics and LakeMaster depending on where I am fishing. Navionics has some of LakeMaster’s data as LakeMaster sells their surveys to Garmin, Navionics, and whoever. If you look on Navionics website they will list the maps from LakeMaster as +LakeMaster ProMap under Source Key. Last but not least each company adds new high definition surveys each year so you need to update to stay current. Both companies are mapping all summer. LakeMaster just did Michigan and added some of the Canadian side of LOW. Navionics is mapping nationally. I used their map chip for the PWT Championship on Milford Lake, Kansas. When I say mapping, they are taking boats on the water and collecting their own data and creating maps. These maps are much better than the State surveys which is what Fishing Hot Spots mostly uses. If you haven’t noticed, I love maps and have a major collection of paper maps, Navionic and LakeMaster chips, plus my own special maps. This is my record for longest posting. Too much coffee!
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