South America GPS Maps...
Become a high tech adventure traveler

Global Positioning System is a radio-navigation system that can pinpoint your position anywhere on the globe, usually, within few yards or meters.

It was developed in the 1970s for military use by the US Department of Defense (DOD), but they soon realized that there would be many civilian applications as well.

For that reason, DOD created two transmission codes...
- P code (precision code) for highest accuracy level
- C/A code (Civilian Access code)

GPS tracking
GPS Tracking - © Renee Lee / Istockphoto

However, once in operation, GPS receivers using C/A code, proved to be more accurate than intended so DOD created a system for randomly degrading the accuracy level to being within 100 meters or less.

It's called Selective Availavility (S/A). S/A is now turned "off", so readings are much more accurate.

One kind reader, Dave, has provided us with a thorough explanation on this...
"C/A codes are not "civilian access" codes.
A C/A code is a Coarse Acquisition code that is used to acquire a GPS satellite signal from space. Each satellite has a unique code.
The purpose for the code is not to distinguish military from civilian use (although it does do that).
It is necessary to have this long code to identify a GPS signal since it is so far away there are things like noise to filter out.
C/A codes are a specific application of Gold Codes, which are designed to have high cross correlation properties"

Thanks Dave.

If you have something to add on this, don't hesitate to voice your opinion through the Contact Us page.

How GPS Works:

The system uses a constellation of 24 NAVSTAR satellites and five ground stations to keep them in precise orbit.
Each satellite was placed at an altitude of 10,900 miles and orbits the earth in about 12 hours.

The satellites transmit data via high frequency radio waves back to earth and, by locking onto those signals, a GPS receiver can process this data to triangulate its precise location on the globe.
It is basically a technique for measuring distance with time.

By locking onto the signals, from a minimum of three different satellites, a GPS receiver can calculate a two-dimensional positional fix consisting of your latitude and longitude.
By locking onto a fourth satellite, it can compute a tree-dimensional reading that gives your altitude as well.

An average GPS receiver has twelve channels, and the remaining eight track all other visible satellites, providing an accurate and enhanced reading even in adverse conditions such as valleys and heavy foliage (dense woods).

Please check the following sources to get you started on the road of high-tech adventure traveller...

Southamerica GPS Maps for Travellers:

Because GPS operates 24 hours a day, in all weather conditions, we can use it worldwide for precise navigation on land, water or air.
In addition, receivers had been miniaturized and became affordable money ways.

Our adventure travel South America will be enhanced and more accurate whichever our travel needs are...

Please Note:
Never rely solely on a GPS receiver

An interesting resource is (in Portuguese).
It has combined Google Maps with lots of info for travellers, mainly for Brazil, but some places in Paraguay and Argentina as well (i.e. Iguazu falls).

If you are looking for Brazil GPS maps compatible with Garmin devices, check (site in Portuguese). It's free and very accurate, according to Wilson Roque, one of our kind readers and supporters.
Thanks Wilson for helping us to make South America GPS maps bigger and better.

GPS TrackMaker®#13.0:

TrackMaker is one of the most complete free programs for GPS devices.
Please downloaded it here at no cost.

There is also the PRO version, but most likely you won't need it. You can always buy it later if the situation arises.

TrackMaker® has many interesting features and supports a huge number of models and brands such as Garmin, Maguellan, Lowrance, etc.

Learn how to use the program by downloading the complete help file in English, and also how to connect a device to a PC.

TrackMaker®#13.0 supports different brands and models.

GPS Maps:

GPS maps are map images, waypoints coordinates, route and/or track data for receivers.
Please note that not all of those maps are compatible with all GPS's manufacturer's receivers.
Find out specifically about your receiver before buying it.

A good source for Argentina GPS Maps is Mapear, web site mainly in Spanish that provides free electronic maps for Garmin receivers. In order to use them, you will need to subscribe to their site and to have Mapsource software from Garmin.

For Venezuela GPS Maps visit (free maps, website in Spanish).

Maps (Free) Download Area:

Background Maps:
Machu Picchu-Atacama Expedition:
Files with Photos and Map Images:
General Files:

Have a wonderful South america vacation with South America GPS Maps!...


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