Lowrance electronic 500 GPS Receiver User Manual


 
28
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; county
boundaries; some major city streets; Interstate, U.S. and state highways;
Interstate highway exits and exit services information; large- and me-
dium-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 contains: 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
shape of a coastline or water body, but the higher detail in MapCreate
shows the shoreline completely and accurately (finer detail). Many
smaller islands would not be included in the background map, but are,
of course, in MapCreate.
When the map is zoomed out far enough, most POIs appear as square dots. As you
zoom in closer, the symbols become readable icons. In the 0.2 nautical mile zoom
example at right, the cursor has selected the Cupps Café POI, which triggers a pop-
up box with the POI name. This pop-up box works on POIs at any zoom range.
School POI
POI
Pop-up
Restaurant
POI
POI
Markers
Position,
distance and
bearing data
Zoom
Range
Cursor lineInterstate Major Street