3
Basic GPS mapping techniques
The basic mapping techniques described are specifically addressed for achieving the best results when
collecting points of interest, ways and areas, using a hand-held GPS units, such as the Garmin eTrex
device.
3.1
Collect satellite data and establish location
The steps to initialize the GPS receiver are already described above (Initializing the GSP receiver).
Before you set out to map, you need to initialize the GPS receiver, meaning, the receiver must collect
satellite data and establish its location. To receive the satellite signals:
➢
Be
outdoors
and have a clear view of the sky!
➢
Turn the GPS device on by pressing the
Power
button
➢
GPS is now searching for the satellite signals
➢
The
Locating Satellites
is replaced by
Acquiring Satellites
message
➢
Once the connection is established the
Location
and
Coordinates
appear in the
Acquiring
Satellites Window
You are ready to map!
Collecting satellite data and establishing location
3.2
Collecting Points of Interest
Points of Interest (POI) are points/locations which are of special interest and usually the reason for
conducting a mapping exercise. They are either physical points or events, placed somewhere in space
and time. Some examples of Points of Interest are hospitals, schools, water points, toilets, shops,
religious institutions, and even events, such as, demonstrations, clashes, rallies, etc. By mapping we
determine the exact location of Points of Interest in space and time.
