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GNSS purchase - logic check

lukenz · 2018-07-07T08:14:00Z

I'll preface this with the assumption that pretty much everything on the market has the same rtk specs therefore of the "equipment quality (not how pretty it is, just its ability to do the job)"/price/support pyramid the decision is left to be made on price and support.?ÿWe are also down in New Zealand so the selection is a bit narrower.?ÿ We are looking at a standard base/rover pair with data collector and uhf radio (limited to 2w here unless you have a private channel which is unusual to get).At the top of the market we have Trimble/Leica which is the $60k+ range, Topcon/Sokkia not too far behind and then the 'better value' options.We are a small firm in a reasonably competitive market so the premium for the top end gear cannot be justified and both the boss and I (both licensed surveyors) are pretty good with getting the best out of whatever gear we have.Basically we have narrowed down to a pair of Geomax Zenith 35's and a Panasonic tablet with the 15 hour battery (would have to be with SurvPC as the x-pad software we demoed it with was rubbish, fine for a contractor but hides away all the juicy gnss details a surveyor wants to see and it didn't even have a traverse function in the COGO!!) or possibly a Javad Triumph LS + base.?ÿ The geomax's are sold locally and we would have some support locally and warranty in the same Country whereas the Javad would require import direct from the USA (or possibly the Aussie distributor) which raises warranty and support issues.?ÿ They both appear to work out to be around the $35k mark (in south pacific pesos anyway)We run a Leica 1203 robot also and the SurvPC would integrate into that well also or if it dies a Geomax Zoom 90 would be the obvious replacement. Not paying for a TS15 as $50k+ when the Zoom90 at half that will do the job.I've used Trimble Access and more recently Leica Smartworx (both on 1200 and Viva) and prefer the 'details' approach of Leica.?ÿ I've seen on here people are pretty fond of SurvCE but it looks more clunky that either of the other two and it's raw file seems to be projection coordinate not raw geodetic (also seems odd you have to check a box to get it to store the vectors)??ÿ There is another local guy using a Triumph LS (possibly the only one in the country) but he's spent a massive amount of (chargeable) time to get it all running and while he is happy with it he is not as evangelical as some of the chaps on here.?ÿ We could not expect to rely on him for support.I've watched a good number of the canopy videos and the Triumph LS seems pretty unreal but given the test results hereit seems the R10 isn't that far behind.?ÿ The R10 and Leica GS16/Geomax Zenith 35 are pretty much the same level it appears so perhaps we wouldn't be giving up that much and the lack of domestic support I think should be the deciding factor given how important it is when you have an issue (and they do always come up)?The bulk of our work is urban/rural subdivision, boundary marking and small site topo's.?ÿ You get a number of marks under vegetation where it'd be much more convenient not to put a GNSS pair in and bust out the TS but I'd say half the sites we are on you can do 100% with GNSS (or can change the job to suit the gear i.e. for urban sites often we put in 1m o/s dumpy pegs rather than staking the actual boundary covered in fence/vegetation which still meets the client requirements).If you've got this far your obviously a keen surveyor and any considered opinions would be much appreciated.?ÿ?ÿ

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GNSS & Geodesy

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john-hamilton

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Probably talking New Zealand Dollars, so $60K is about $41K US.?ÿ

Maybe consider Spectra? I think they will work with Trimble access.?ÿ

?ÿ

Posted : July 9, 2018 5:45 am

Ron Herrington

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If there is a better system available than the iG8's, somebody needs to show me!?ÿ Call Mark Silver at igage and visit with him.

Posted : July 9, 2018 8:23 am

lukenz

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Posted by: Ron Herrington

If there is a better system available than the iG8's, somebody needs to show me!?ÿ Call Mark Silver at igage and visit with him.

Yes he seems like a top guy and I've watched several of his youtube videos to clarify GNSS usage methods but it's probably about a 20 hour set of flights to get from Bay of Plenty, New Zealand to where he is at hence why I am leaning more toward an option we can get domestically (mainly due to the support)

Posted : July 9, 2018 12:59 pm

nate-the-surveyor

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Luke,

I don't know what's best for you. But, if there is a guy there with javad gear, go waste a day with him.

Other gear is definitely coming along.

I see it like an old graphical equalizer, to dial in the sounds of an 8 track player. They all have their pluses, and minuses.

Pick one, and run.

The impossible shots from javad are real. You do 'em 2x or 3x, and they are all within some hundredths of each other, most of the time.

Nate

Posted : July 9, 2018 4:01 pm

rberry5886

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Posted by: lukenz

Posted by: Ron Herrington

If there is a better system available than the iG8's, somebody needs to show me!?ÿ Call Mark Silver at igage and visit with him.

Yes he seems like a top guy and I've watched several of his youtube videos to clarify GNSS usage methods but it's probably about a 20 hour set of flights to get from Bay of Plenty, New Zealand to where he is at hence why I am leaning more toward an option we can get domestically (mainly due to the support)

I'm sure Mark would happily travel to New Zealand and demonstrate some good GNSS.... ??ÿ ??ÿ

Posted : July 9, 2018 4:34 pm

shelby-h-griggs-pls

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Another setup to look at might be the offerings from Septentrio?ÿ https://www.septentrio.com/products/gnss-receivers/rover-base-receivers/smart-antennas/aps3g not sure of support in NZ, but those are price competitive here in the states AND the Septentrio?ÿCORS receivers are very solid. I believe Carlson and MicroSurvey data collectors are supported (no native Septentrio?ÿdata collectors as far as I know).

SHG

Posted : July 9, 2018 6:22 pm

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GNSS purchase - logic check

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