4. Select Datum. It is especially important that the datum be correct, since it represents fundamental
assumptions about the size and shape of the earth. Most US users will find NAD83 or WGS 84
appropriate for use with recent data sets, though some older data sets are NAD27.
5. When done, highlight Save and press ENTER
Batteries:
The GPS unit is circulated with two rechargeable batteries. If you need to replace the
batteries with non-rechargeable batteries, change the battery type as follows:
1. From the Main Menu page, select Setup and then
System
.
2. Change the battery type from
NiMH
to
Alkaline.
Waypoints
Collecting Data with the GPS
The Mark Waypoint Page can be used to record individual point coordinates and attributes (name,
elevation, time and date).
1. Press in and hold the ENTER/MARK key until the Mark Waypoint Page appears.
2. To change the name of the waypoint (optional), use the ROCKER key to highlight the waypoint
name field and press ENTER to display the on-screen keypad. Use the ROCKER key and ENTER
key to create a name for the waypoint. If you choose a name that has already been used, a
"Waypoint Already Exits” message appears.
3. To assign an identifying symbol to a waypoint, use the ROCKER key to highlight the symbol block
next to the waypoint name and press ENTER to display the Symbols Chart.
4. To save the waypoint to the Find Menu Waypoints List, highlight “OK” and press ENTER.
5. If you do not want to save it as a new waypoint, press the QUIT button to cancel.
Tracks
Tracks consist of data (Track Log) gathered automatically (at specified time or distance intervals)
while in motion.
Tracks primary purpose is to record path and speed, rather than detailed info for
particular points. The Garmin 76CS can also be used to measure the area of any space you
encompass with a track, and retrace your path in either direction. The Tracks page can be accessed
from the Main Menu page or by cycling though active pages using the PAGE button. The Setup page
can be used to configure logging options.
Routes
Routes are a sequence of waypoints which lead to a destination. Their primary purpose is as a
navigational aid when used in conjunction with a GPS. The GPS will tell you the bearing and distance
to the next point in sequence as you navigate along your route. The 76CS can store 50 routes, with
up to 250 waypoints each. To create a route, access the Routes page from the Main Menu.
Downloading Data
Note: The Mann Library classroom computers have the necessary software and drivers already
installed. If using a different computer, you will first need to download and install drivers from
http://www.garmin.com/support/blosp.jsp
, and the DNR Garmin software. It is available for free from
http://www.dnr.state.mn.us/mis/gis/tools/arcview/extensions/DNRGarmin/DNRGarmin.html
.
