AI Assistant
Notifications
Clear all

TBC elevation issues

5 Posts
4 Users
0 Reactions
996 Views
Tiglinda
(@tiglinda)
Posts: 44
Member
Topic starter
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

I have a project that has both RTK and conventional data. The conventional data woks with the 2 OPUS points on the project just fine. The RTK data is another story. Every RTK shot appears to be 3 to 4 feet higher than their corresponding conventional points.

I've looked at rod heights, base height, instrument heights, and can't find anything that looks wrong. Even when they were sitting on the 2 OPUS points taking direct shots on the RTK points they were 3 to 4 feet off. When I look at the vector data in TBC it looks like it should work.

Has anyone ever run into this before?

Thanks.


 
Posted : July 30, 2013 4:00 pm
RADAR
(@dougie)
Posts: 7880
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

If this was Washington State, I would say it was the difference between NGVD29 and NAVD88


 
Posted : July 30, 2013 4:25 pm
Tiglinda
(@tiglinda)
Posts: 44
Member
Topic starter
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

I suspect that there's something not processing in TBC corectly and I just can't find it. My project is in NAVD88 and the conventional data is being process with those elevations as its starting point.


 
Posted : July 30, 2013 4:54 pm
John1Minor2
(@john1minor2)
Posts: 688
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

Tiglinda
I don't know if this is pertinent to your problem but one of our guys had a 1.25' discrepancy that we attributed to this issue.


 
Posted : July 30, 2013 7:57 pm
Alan Chyko
(@alan-chyko)
Posts: 159
Member
Translate
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
 

Was the initial RTK base point occupied using a "Here" position? If so, you may have to delete that coordinate entry from that point and recompute the project.


 
Posted : July 31, 2013 5:53 am