Lowrance electronic globalmap 3500c Manual Do Utilizador

Página de 136
The performance doesn't stop there. Stored in the permanent memory 
of each unit is a basic background map of the entire world. We lock it in 
here at the factory — you can't change or erase this map. 
The background map is suitable for many navigation chores, but for 
maximum accuracy and much more detail, you need our optional map-
making software, MapCreate
 6. Some unit features — such as search-
ing for businesses and addresses — won't work without a custom Map-
Create map. There is so much detail in our background map (and even 
more in MapCreate) that we'll describe their contents and differences in 
Section 3, Basic GPS Operations, on page 31. 
Another portion of the GlobalMap 3500C's onboard memory is devoted to 
recording GPS navigation information, which includes waypoints, event 
marker icons, trails and routes. This lets you look back the way you came. 
Think of this data storage like the hard drive memory in a computer or a 
tape in a cassette tape recorder. You can save several different GPS data 
files, erase 'em and record new ones, over and over again. Like any com-
puter file, these GPS Data Files (file format *.usr) can be shared be-
tween Lowrance GPS or sonar/GPS units or even personal computers. 
This GlobalMap 3500C has one more thing in common with a personal 
computer. Just as computers have a floppy disk drive for storing and ex-
changing files, the unit has a slot for an MMC (MultiMedia Card) or SDC 
(Secure Digital card) flash memory card. These solid-state memory de-
vices are about the size of a postage stamp, but can hold data ranging 
from 8 MB to 128 MB in size. (Compare that to a floppy disk's 1.44 MB 
capacity!) This unit uses all that MMC space for two key GPS purposes. 
First, you can backup your onboard GPS Data Files by copying them to 
the MMC. Since the MMC is removable (like a floppy disk or a cassette 
tape), you can store these GPS Data Files on a personal computer 
equipped with an MMC card reader. (Or store them on a pocketful of 
MMCs, if you don't have a computer.) Our MapCreate mapping software 
can save, edit or create its own GPS Data Files, which can be copied to the 
MMC and then loaded from the MMC into the unit's memory. (NOTE: No 
matter where they come from, GPS Data Files must be loaded from the 
MMC into memory before the GlobalMap 3500C can use them.) 
The other key GPS use for MMCs is storage of special high-detail, cus-
tom maps, which you can produce on your computer with our MapCre-
ate software. These MapCreate custom maps contain much greater de-
tail than the basic background map. These Custom Map Files (file 
format *.lcm) can also be shared between Lowrance GPS or sonar/GPS 
units and personal computers.