Good advice on checking travelocity
There are lots of outfitters that provide guide and equipment services in that region. Check some of their websites and see if you can trade emails with them for a recommendation.
The gps units of different brands all use the same constellation of satellites for determining where your device is. What you want to make sure is that you find the company with the best maps of that region for the application you need. I have a garmin nuvi 370 and think it is great but, I have not used it to navigate in wilderness or remote areas (I am still a compass and map kinda guy)
Have you tried google maps mobile?
If you ave a GPS transponder in the phone, it's even better.
Nice Little App for the iPhone
FYI: If you have an iPhone, there's a nice little 99 cent app called "iMapsPro Buenos Aires." It's just a plain map of Capital Federal up to about Tigre and down to about Avellanada, but the nicest feature is that you just press a little button and it shows you where you are on the map via GPS. No, it doesn't do navigation and you can't look up addresses, and it's not perfect, but hello, 99¢ if you already have an iPhone.
Dude! You have me curious!
I really like your post about the Nuvi Map at 200 pesos. I bought my chip 3 years ago and it was the only real working Garmin chip for Argentina. Although it was very expensive, I was able to sublet it to El Jeffe so as to minimize the pain. I use the Garmin to travel out of BA to the northern provinces on my bi-annual fishing / fucking trips. In reality, it's the getting in and out of BA that motivated my purchase. For what ever it's worth, the Garmin has performed exceptionally well within the Capital and surrounding province as well as throughout Argentina. Very good indeed. My only question relating to the Nuvi / cheap chip GPS unit is have you used it as a navigational tool while driving in argentina, especially BA proper. I kinda of find it hard to believe that the price of the Garmin chip would still be really high if a 200 pesos competitor existed. Your comments will be appreciated on the performance of you're NUVI with the 200 pesos chip.
Happy Mongering All.
Toymann
TomTom Expands to Argentina
Competition is on the horizon: [url]http://www.directionsmag.com/press.releases/index.php?duty=Show&id=34994[/url]
Tom Tom Argentina / Uruguay iPhone
This is just to let you all know that the Tom Tom application for iPhone is now available with the Argentine / Uruguay maps. This is turn-by-turn navigation and it's on sale until January 11th for just $49 at the iTunes store. Pretty sweet deal if you ask me.
don't scoff at proyectomapear. Com. Ar
[QUOTE=Toymann]I am certainly getting a bit of a chuckle out of this thread. Yes, there are some internet free downloads for argentina as far as maps go. As far as I know, at this time, there is only one GARMIN, navigating map set for argentina. It's very pricey, but works quite well. Good luck with the knock-offs! Been there, done that! Doesn't get it done. Happy Mongering All. Toymann[/QUOTE]I have both the original garmin maps (bought on a sd disk from garmin) and the proyectomapear. Com. Ar free downloaded once joined free forum and the mapsource program and at least for now in the Buenos Aires and surroundings (I have gone to Gualiguachu and found hotels using it) the projecto mapear newest version (8.6) is very very good and gets you anywhere with no problem and so far it has helped me find anyplace I need & it had all the info I need and worked great with my garmin nuvi
More than you wanted to know about GPS
[QUOTE=WorldTravel69]I wonder how GPS adjusts for shifts in the Earth crust?
After the earthquake in Chile, BA has moved 3 cm West and Concepcion is now 10 feet West of where it was.[/QUOTE]Your ordinary navigation-grade GPS might register the 10-foot shift. It would take (it [u]took[/u]) a surveying-grade GPS to register the shift of Buenos Aires.
GPS works by time differences. The receiver starts with the difference between "time tick" signals from the satellites in view, and a mathematical model of their positions relative to the center of Earth's gravity. If you've ever looked at the "estimated position error" figures on a GPS when you turn it on, the position gets better with time - it may start out with an EPE of 150 feet or worse, and after a couple of minutes it settles down to 15 feet or better. This is because more time, and more computations, improve the math model.
There are, however, several items that change the signals enough that a navigation-grade GPS will never get much better than 10 feet accuracy. First and worst is "multi-path error," where the signal gets reflected and re-reflected from buildings or even trees. Try using one in the downtown area and you'll soon see what I mean. A similar error can be caused by rain, as the raindrops actually do diffuse the signal. Variations in the ionosphere can slow down or bend the signal (this is familiar to shortwave-radio users); and the troposphere, the lowest layer of our atmosphere, can also bend the signals enough to introduce error. And there are tiny variances in the satellites themselves; although the GPS "control segment", with its monitoring network, keeps pretty good tabs on that. They figure the "satellite almanac" that your receiver uses to predict the orbital position of the satellites on a moment-to-moment basis; it's broadcast with the GPS signal from each satellite, and the receiver downloads it every time you use it.
You can improve that position quite a bit by using "differential GPS," which means you have a GPS receiver at a known, surveyed location near the area where you're working. This broadcasts the difference between its actual position and its "GPS position," in such a way that your GPS receiver can also receive that difference and apply it to the position it's calculating. This wouldn't help after an earthquake that shifted the crust under the benchmarks too!
Surveying GPS receivers operate differently. Rather than calculate your position on a moment-to-moment basis, they save up all of the raw data over an extended period of time. Then the surveyor loads this raw data into a computer for post-processing, using far more positioning data and more sophisticated processing programs than you'd be able to use in a navigation-grade GPS. They can also download the satellites' actual position data from the GPS control segment, 24 hours after they collected their position data; with all that help, they can calculate a position to within a centimeter or better [I]independent of local control.[/i]
This post-processing is what the "national survey" would have used to come up with that 3cm shift in Buenos Aires' position.
(Geez, this should teach you not to dangle an "instructional opportunity" in front of a retired teacher!)