6: Examples of GPS handheld units.
receivers can range in price and functionality from simple handheld
units that provide a spatial location to more complex data loggers
that actually collect points for further processing and analysis.
Some receivers can load GIS software such as ArcPad which is a mobile
mapping software created by ESRI. This software allows the user
to perform GIS and mapping tasks in the field based on the locations
collected with the receiver that include:
the more complex GPS units that actually collect and store data,
a GPS processing software is needed to accurately correct errors
and manipulate data. This processing software facilitates transferring
data collected from a GPS unit into your GIS application and includes
but is certainly not limited to the following products:
This software available from Trimble provides advanced processing capabilities that include data dictionary editors, import/export format utilities and differential correction routines. More information can be found at http://www.trimble.com/pathfinderoffice.html.
This software available from Waypoint Consulting Inc. is called GrafNav/GrafNet. It can download raw GPS data files from most GPS receivers, and it processes these files to improve accuracy and quality assurance. More information is available at http://www.waypnt.com/.
This free downloadable GPS application is available at http://www.easygps.com/. It allows the user to transfer data between a computer and a Garmin, Magellan, or Lowrance GPS unit.
are various other GPS processing applications available, many of
which are free and downloadable. It is essential to determine which
particular program will be compatible with the software that your
GIS application uses. The processing program must be able to manipulate
and export the GPS data so it is readable in the GIS software that
you are using.