Posted by Chooch on July 04, 2012 at 06:12:07 from (75.19.183.157):
In Reply to: Any Surveyor's here posted by John in la on July 03, 2012 at 20:28:25:
John,
I am a licensed surveyor in IN, OH and was licensed in LA although I have allowed it to expire. You can check to see if a surveyor is licensed by going to www.lapels.com and clicking the licensee search.
Regarding the quotes, it appears that the 3 surveyors are providing an elevation by 3 separate, but valid, means.
Surveyor No. 1 is using an established benchmark and using a 2-man conventional level to bring elevation to the site. He will then set a point at the site to provide elevation for construction. Once constructed, he will come back and check to see that you built to the proper elevation.
Surveyor No. 2 is apparently using static GPS. On the first trip, the receivers will gather information from the satellites but then must be taken back to the office to download to computer. Once he has downloaded the information, then he comes back and uses the GPS points to establish proper elevation at the site. Finally, he will come back to verify that it was built to the proper elevation.
Surveyor No. 3 is apparently using real time (RTK) GPS. The receivers not only download the data but process it on site allowing the surveyor to stake the proper elevation during the first visit. He also will then come back to check to see if it was built correctly.
As stated above, all three are valid methods and as long as the surveyor is licensed, any of the above should be satisfactory.
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