14
3. Logging and Describing a Line Feature
Basically, you use the same procedure as when you log a
point feature (see 2. above). There are however two differ-
ences when you log a line feature:
-
You need to define a logging interval when you start
logging the feature
-
And then you are supposed to move from the begin-
ning to the end of the line feature before stopping the
logging.
These differences are explained below.
After highlighting a line feature from the Feature List
screen (for example a road) and pressing ENTER,
MobileMapper Pro starts logging GPS positions from the
position where you are. The default logging interval is 5
seconds.
By decreasing the logging interval you can increase the
level of detail in your maps. By increasing the logging
interval, you can save memory. In general, you should set
the logging interval to the smallest setting possible with-
out running out of memory (see note opposite). Remem-
ber you can take multiple SD cards with you to the field.
The only requirement is that you close a job file before
powering down the receiver to replace the SD card.
To change this interval:
-
Press MENU, highlight
Logging Interval
and press
ENTER.
Note: There is a
spreadsheet calculator
on the Magellan Tech-
nical Support ftp site
(ftp://ftp.magel-
langps.com,
MobileMapper/FAQs
directory) that you can
use to estimate how
long you can log data
based on how much
free memory is on your
receiver's SD card and
which logging interval
you wish to use.
Selecting the logging
interval option
