Please select the C-Map chip you require above. If you need help or you need to order another type of Digital Chart, then please give us a call at + (+) and ask for our Electronics Department. What does MAP Price mean? "MAP Price" stands for "Minimum Advertised Price" which means that we are not allowed to advertise some of the actual prices we sell for because of a manufacturer's policy requiring that any advertising of its products be done at certain prices at or above a Minimum Advertised Price (MAP). Discover the industry's most advanced high-definition lake coverage with the C-Map® Lake Insight® HD Electronic Map Chart Card. 5 regional cards chart an unbelievable array of lakes, including thousands with high-definition ' shaded depth contours, high-resolution bathymetric contours, C-MAP Depth Area Shading, and high-resolution shaded relief.1/5(2).