Lowrance electronic LMS-520C - Manual (Page 124)

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Map Page opening screen (left). Set to 100-mile zoom (center) and 10-
mile zoom (right). Over Zoomed means you have reached the detail
limits in an area covered only by the basic background map. Zooming
in closer will reveal no more map detail because a high-detail custom
map has not been loaded on the MMC for this area.
If you're using only the factory-loaded background map, the maximum
zoom range for showing additional map detail is 20 miles. You can con-
tinue to zoom in closer, but the map will simply be enlarged without
revealing more map content (except for a few major city streets.) Load
your own high-detail custom map made with MapCreate (or a pre-made
FreedomMap from LEI), and you can zoom in to 0.02 miles with mas-
sive amounts of accurate map detail.
Map Pages with high-detail MapCreate map of an urban area loaded on
the MMC. Arterial streets appear at the 4-mile zoom range (left) with a
few Point of Interest icons visible. Numerous dots representing Points of
Interest are visible at the 2-mile range (center) along with minor streets.
At a 0.4-mile zoom (right), you can see an interstate highway with an
exit, major and minor streets as well as Point of Interest icons.
Background map vs. MapCreate map content
The background map includes: low-detail maps of the whole world, con-
taining cities, major lakes, major rivers, political boundaries, and me-
dium-detail maps of the United States. The medium-detail U.S. maps
contain: all incorporated cities, shaded metropolitan areas, county
boundaries, shaded public lands (such as national forests and parks)