GPS device to land surveying.

[carolschwanke]

Hello,

 

I'm a Forest Engineer, and I'm looking for a new GPS to land surveying.

I'm looking for a few months now, for a cheap gps alternative to land surveying, and the Monterra, seems a good alternative, but I didn't found a few information that I would like to know to help me choose my new GPS, so if possible please answered me this information:

- Which carriers does the Monterra uses: L1, L2, L1 and L2, other carriers?

- What is the possible accuracy that I can met with it, without using the WAAS, as I live in Brazil, and the WAAS don't work here.

Which the other device option that you indicate to land surveying?

 

Thank you.

[RamblinBear]

Hi,

 

As far as I know, the Monterra uses L1 only, as well as being able to access the Russian GLONASS signal and WAAS satellite signals (though as you say WAAS won't work for you in Brazil).

 

I would imagine that the best accuracy you can reliably hope for would be about +/-5 metres - regardless of what it says the error is on the screen of the device.

 

You'll have to pay quite a bit more than the price of a Monterra to get sub-metre accuracy. It all depends on what level of accuracy (and repeatability) you need for your surveys. If you do need better accuracy, then you'll need to look at devices like the Ashtech MobileMapper 120 or the ProMark 120, or some of the Trimble or Topcon devices - but make sure you're sitting down before you look at the prices.