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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 0.4 nau-
tical mile zoom example at right, the cursor has selected the Denny's res-
taurant POI, which triggers a pop-up box with the POI name. This pop-up
box works on POIs at any zoom range.
Tip:
In some urban areas, businesses are so close to one another that
their POI icons crowd each other on the screen. In the preceding
figure, you can see a packed string of POIs all along the west half of
11th. You can reduce screen clutter and make streets and other
map features easier to see by simply turning off the display of POIs
you're not watching for. (To see how, check the text on Map Detail
Category Selection, in Sec. 5. It shows how to use the Map Catego-
POI
Pop-up
Restaurant
POI
POI
Markers
Position,
distance and
bearing data
Zoom
Range
Cursor line
Interstate Major Street
Minor
Street
Data boxes
display
navigation
information