Lowrance 540c baja 操作ガイド

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); some major city streets; Interstate, U.S.

and state highways; Interstate highway exits and exit services infor-

mation; large- and medium-sized lakes and streams; and more than

60,000 navigation aids and 10,000 wrecks and obstructions in U.S.

coastal and Great Lakes waters.
MapCreate custom maps include massive amounts of information not

found in the background map. MapCreate maps contain the searchable

Points of Interest database, all the minor roads and streets, all the

landmark features (such as summits, schools, radio towers, etc.); more

rivers, streams, smaller lakes and ponds and their names.
What's more important is the large scale map detail that allows your

GPS unit to show a higher level of position accuracy. For example, the

background map would show you the general outline and approximate