Transcript .ppt download

Surveying -- HOW
TO
• GPS -- how it works
• GPS -- Garmin 12
GPS Tutorial
http://trimble.com/gps/
go to site
Change
windows
The Garmin 12 GPS
Use to scroll and for keying
Confirm
Get back to a point
TURN ON
First page up….
4 important
pieces of data
The satillite
It’s signal
Nav
Error
Once you
have a fix
Where you are
Your elevation
(flaky)
Are you moving?
Are you late?
Enter a point
1.
2.
3.
4.
5.
6.
7.
Page to a list
Highlight “waypoint”
Hit enter
Select and hit “new”
Name waypoint
Add coordinates
Select and hit “done”
Getting back to
where you
started
Hit GOTO
Pick a Waypoint
Follow the arrow
Monitor Speed
Check Distance
CRUDE
Where you are...
Scale
Zoo
m in or out
GPS Accuracy
Non-corrected 5-30 m
Beacon-corrected 1 m
Radio-corrected cms
Post-processed dm to m
Real Time beacon correction for
lake cores and bathymetry
Differential GPS for precision
surveying of river terraces and
alluvial fans
Cm-scale maps of desert surfaces