Show us why the public should always call a land surveyor

Where are you surveying?


🌐 Show Forums for All Locations
Land Surveyor Community

Our company just recently within the last year got a GPS unit for surveying....

So far we have not had many issues that could not be figured out on our own until recently...

We were doing a topographic survey of a large fruit packing facility and we opened a few doors and placed the Rover just inside the door to get Finish Floor Elevations and recorded the shot like normal and continued on like normal. Later back at the office when making the map we noticed that the finish floor shots we took had about 2 foot of variation in elevation between them on a building that had a flat finish floor with no steps up or down.

We went back to the site, set up a level and checked from a benchmark and the finish floor was all the same level.

All of our other topog appeared to be correct as well. So it appears that the GPS rover errored (vertically only) when placed in and under a doorframe.. Has anyone else experienced this???

Also just to clarify when the shots were taken the rover reported fixed and not floating...

You need to be a member of Land Surveyors United - Global Surveying Community to add thoughts!

Join Land Surveyors United - Global Surveying Community

Votes: 0
Email me when people reply –

Replies

  • Thanks you for the input. seems that my operator was loosing his fix in the doorways (he didnt confess to this right away) so he would go out away from the door until he got a fix and then rush back in and take a quick shot before the gps unit could report a lost fix again. So i guess this fools the computer (data collector) into believing it had a good fix at the time of the topog shot. Needless to say we will not be trying this again....

     

  • Land Surveyor
    Sounds like multi path issues and a weak solution as a result of the "masking" of your horizon (you did not get enough Satellites in view). The metadata should confirm this if you take a look.
  • Student Surveyor

    I assume you are using RTK mode in for your survey. Are you able to achieve lock or did you lose lock when you are standing under the doorway? 

This reply was deleted.

Answer As your Facebook Page

Global Surveyor Forum

Latest Discussions by Category

How to Utilize Surveyor Forums

How to use Forums
Our forums on Land Surveyors United are here to be used as much for finding help with problems in the field as the are for you to express your opinions on anything that has to do with land surveying in general. Feel free to share anything that is on your mind, as long as it isn't meant to damage another member's reputation. Please keep it clean and help insure that everyone has the opportunity to enjoy the benefits of being part of a community that grows together.

We are committed to allowing freedom of expression for all of our members, and that includes maintaining a safe space for people with opposing views to express themselves. We get posts from all over the country and even the globe, so needless to say, people come with different viewpoints on lad surveying practices and processes. We see this diversity and variety as a real strength-- dialogue and debate are an integral part of the educational process, as well as an important tool in exploring different sides of complex issues.

All Community Hubs inside the community have their own forum for asking specific questions to other surveyors, by location, equipment type, etc.

Topics by Tags

Monthly Archives

Global Forums

Add Your Expertise

🌐 Explore Forums Based on Location

Blog Topics by Tags

Monthly Archives