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Posts Tagged ‘mobile gis’

GeoExplorer 6000 Review (Part 1 – Canopy Challenge)

Thursday, April 7th, 2011

 

The internet tends to be a place of ‘ADD’ and short-lived attention spans when it comes to readers looking at content (trust me, I’m guilty).  That’s why I’m deciding to publish my review of the new GeoExplorer® 6000 into four parts.  Tiny bite size pieces are the way to go, given today’s hustle and bustle.

Welcome to part 1.  On a cold snowy morning some few weeks ago, I took my GeoExplorer® 6000 loaner (from Seiler Instruments) out to meet Tim Smith, the National Park Service’s GPS Program Coordinator.  If anyone knows about GPS under canopy, it’s this guy.  Around a foot of snow had fallen overnight in beautiful Conifer, Colorado helping to load up the evergreen trees around our GPS test course.  The loaded canopy can be a  GPS unit’s worst nightmare.  I thought to myself, “This was exactly how I’d like to put this unit through it’s paces”.

 

We occupied a total of three monuments.  All of them were shot in with a survey-grade total station.  The horizontal and vertical coordinates were of very high accuracy. Besides the GeoExplorer®, we hooked up a Zephyr antenna, and dialed in to the Trimble® VRSNow™ service.

 

VRSNow™ Coverage USA

Trimble GeoExplorer Review Preview

Tuesday, March 22nd, 2011

I just wanted to post a preview for my upcoming review of the GeoExplorer 6000 series.  I’ve been a little busy lately with other work (go figure.)  In my previous post, I outlined the history of the GeoExplorer Series, and promised an in-depth review.

 

I received my GeoExplorer last week from Seiler Instruments (Thanks Jay and Lanny!) and just finished my final test last Sunday 3/20/11.  Here is what I’ve performed for my testing….

 

 

  1. Canopy Testing: Tim Smith at the NPS loaned me his Saturday and his GPS Test course at his house in Conifer, CO for this test.
  2. Urban Canyon:  I drove around the streets of downtown Denver streaming a Polyline feature in TerraSync.  This was probably the hardest test.
  3. Quick static occupations of NGS Control around the Greater Denver Area.  Just to see how accurate this receiver would be against known control that a surveyor would reference.
  4. Relative Precision: I set out some measuring tape in Washington Park in Denver and measured set lengths of 10 feet.  I tested the VRSNow network as well as the beta test the new little known about NGS CORS NTRIP streaming service.
For all of my tests, I used VRSNow or the NGS Streaming Service.  There is so much more to share.  However I’ll just post a preview below of my Downtown Streaming test.  Trimble had a dataset that they used in their GeoExplorer 6000 series webinar for downtown.  I wanted to see just how repeatable this sort of data was.  I used an external Zephyr Antenna (Provided by Frontier Precision) and VRS.  Note: You will need the Google Earth Plugin to view the frame below.  What you are seeing below has not been edited!  Trying to pull off a polyline like this in the first pass can be a pain; that’s no longer the case with this reciever.

Trimble GeoExplorer Timeline

Sunday, February 20th, 2011
GeoExplorer 6000 Series

GeoExplorer 6000 Series

The new GeoExplorer® 6000 Series was just released on February 17th, 2011. We are now coming close to 15 years of the GeoExplorer® series. I thought it prudent to create a timeline for this product’s history and notable specification changes. Take heed, as this timeline might make some feel like old-timers to the game of Mobile GIS. It is amazing how far the hardware has come. The original GeoExplorer® I/II (circa 1996) boasted 250Kb of storage, a 6 Channel GPS Receiver, and AA Batteries (not included). Fast forward to 2011 and the New GeoExplorer® 6000 Series is boasting 2Gb of Storage and a 220 Channel GPS Receiver…. Read More at RockyMountainGeo.com

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